TSUREKAWA Sadahiro

J-GLOBAL         Last updated: Jul 12, 2019 at 11:59
 
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Name
TSUREKAWA Sadahiro
URL
http://www.msre.kumamoto-u.ac.jp/~mice/
Affiliation
Kumamoto University
Job title
Professor
Degree
Doctor of Engineering(Kyushu University), Master of Engineering(Kyushu University)

Research Areas

 
 

Academic & Professional Experience

 
Apr 2017
 - 
Today
Professor, Faculty of Advanced Science and Technology, Kumamoto University
 
2010
 - 
2011
 Professor, ,Graduate School of Science and Technology(Engineering group),Kumamoto University
 
2009
 - 
2010
 Professor, ,Graduate School of Science and Technology(Engineering group),Kumamoto University
 
2009
 - 
2011
 Professor, ,Faculty of Engineering,Kumamoto University
 
2011
   
 
 Professor, ,Graduate School of Science and Technology(Engineering group),Kumamoto University
 

Education

 
 
 - 
1990
Materials Science and Technology, Graduate School, Division of Integrated Science and Engineering, Kyushu University
 
 
 - 
1987
Materials Science and Technology, Graduate School, Division of Integrated Science and Engineering, Kyushu University
 
 
 - 
1985
Faculty of Engineering, Kumamoto University
 

Published Papers

 
Seiichiro Ii, Kyosuke Hirayama, Sadahiro Tsurekawa
Materials Transactions   60(5) 636-641   May 2019   [Refereed]
We measured the local magnetic moments at grain boundaries in Fe–Si and Fe–Sn alloys by electron energy loss spectroscopy with a transmission electron microscope and evaluated the relation between the grain boundary magnetism and grain boundary se...
S. Kobayashi, S. Ogoe, S. Tsurekawa
Materials Transactions      Apr 2019   [Refereed]
K. E. Aifantis, H. Deng, H. Shibata, S. Tsurekawa, P. Lejček, S. A. Hackney
Journal of Materials Science   54 1831-1843   2019   [Refereed]
TSUREKAWA Sadahiro
ISIJ International   58(11) 2110-2116   Nov 2018   [Refereed]
S. Nakayama, N. Sekito, S. Uemura, S. Tsurekawa, K. Yoshimi
Materials Transactions   59(4) 518-527   Apr 2018   [Refereed]
Y. Tokuda, S. Tsurekawa, D. A. Molodov
Materials Science and Engineering A   716 37-41   Feb 2018   [Refereed]
Sojiro Uemura, Takateru Yamamuro, Joung Wook Kim, Yasuhiro Morizono, Sadahiro Tsurekawa, Kyosuke Yoshimi
Materials Transactions   59(1) 136-145   Jan 2018   [Refereed]
K. Kaede, A. Jäger, V. Gärtnerová, C. Takushima, T. Yamamuro, S. Tsurekawa
MRS Advances      Jan 2018   [Refereed]
Y. Morizono, S. Tsurekawa, T. Yamamuro, S. Yoshida, Y. Kawano
Materials Transactions   58(4) 600-605   Apr 2017   [Refereed]
J. Bočan, S. Tsurekawa, A. Jäger
Materials Science and Engineering A   678 337-342   2017   [Refereed]
M. Matsuda, R. Sago, K. Akamine, S. Tsurekawa, K. Takashima, M. Nishida
Journal of Alloys and Compounds   682 124-131   Oct 2016   [Refereed]
© 2016 Elsevier B.V. All rights reserved.We investigated the relationship between the microstructure and mechanical properties of the ternary Co50Fe50-xPdx alloys with different Pd content. Co50Fe45Pd5, Co50Fe40Pd10 and Co50Fe35Pd15 alloys anneale...
Sojiro Uemura, Takateru Yamamuro, Joung Wook Kim, Yasuhiro Morizono, Yasuhiro Morizono, Sadahiro Tsurekawa, Sadahiro Tsurekawa, Kyosuke Yoshimi
Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals   80 529-538   Jan 2016   [Refereed]
© 2016 The Japan Institute of Metals and Materials.Mo-Si-B-TiC alloys have been produced as candidates for a ultrahigh-temperature materials to replace Ni-base superalloys. We have quantitatively investigated the microstructure of a Mo-Si-B-TiC al...
S. Kobayashi, S. Tsurekawa, T. Watanabe
Journal of Nanotechnology   7 1829-1849   2016   [Refereed][Invited]
K. Hirayama, Y. Yoshii, Y. Morizono, S. Tsurekawa, Y. Hidaka
ISIJ International   55(9) 1973-1979   Sep 2015   [Refereed]
M. Matsuda, S. Nishimura, S. Tsurekawa, K. Takashima, M. Mitsuhara, M. Nishida
Journal of Alloys and Compounds   618 527-532   Jan 2015
© 2014 Elsevier B.V. All rights reserved.The antiphase boundary (APB)-like structure of both 9R and B19 martensites in the Ti-Pd-Fe alloy was investigated by means of transmission electron microscopy. Some APB-like structures with curved and wide ...
Mitsutaka Yoshimoto, Shinzi Agawa, Yasuhiro Morizono, Sadahiro Tsurekawa
Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan   123 903-907   Jan 2015
© 2015 The Ceramic Society of Japan.Titanium plates covered with anodic oxide films with thicknesses of approximately 10μm were embedded in a mixture of iron, graphite, and alumina powders, and then heated in the temperature range of 10731373K for...
Kyosuke Hirayama, Kyosuke Hirayama, Yonosuke Yoshii, Yasuhiro Morizono, Sadahiro Tsurekawa, Yasuyosi Hidaka
ISIJ International   55 1973-1979   Jan 2015
? 2015 ISIJ.Thermomechanical treatments for manipulating grain boundary microstructure in 10 wt%Cr ferriticmartensitic steel SUH3 have been studied. Material with a high fraction of coincidence site lattice (CSL) boundaries was successfully produc...
Yasuhiro Morizono, Takuya Yamaguchi, Takuya Yamaguchi, Sadahiro Tsurekawa
ISIJ International   55(1) 272-277   Jan 2015
? 2015 ISIJ.A carbon steel plate containing 0.87 mass% C was coated with an aluminum foil with a thickness of 100 μm by explosive welding. This aluminum-coated steel was heat-treated in the temperature range of 973-1 273 K for up to 7.2 ks in the ...
M. Matsuda, F. Tanaka, S. Tsurekawa, K. Takashima, M. Mitsuhara M. Nishida
Philosophical Magazine Letters   95(1) 21-29   Jan 2015   [Refereed]
M. Matsuda, F. Tanaka, S. Tsurekawa, K. Takashima, M. Mitsuhara, M. Nishida
Philosophical Magazine Letters   95 21-29   Jan 2015   [Refereed]
? 2015 Taylor & Francis.A novel long-period stacking-ordered (LPSO) structure of a martensitic phase in a Zr-Co-Pd alloy was discovered and characterized by means of conventional transmission electron microscopy and high-angle annular dark-field s...
Kyosuke Hirayama, Seiichiro Ii, Sadahiro Tsurekawa
Science and Technology of Advanced Materials   15 015005   Feb 2014
We have determined local magnetic moments at nickel grain boundaries using a transmission electron microscopy/electron energy loss spectroscopy method assuming that the magnetic moment of Ni atoms is a linear function of the L 3/L2 (white-line rat...
M. Matsuda, R. Yamashita, S. Tsurekawa, K. Takashima, M. Mitsuhara, M. Nishida
Journal of Alloys and Compounds   586 87-93   Jan 2014
The antiphase boundary (APB)-like structure of B19′ martensite via R-phase transformation in a Ti-Ni-Fe alloy was investigated by means of transmission electron microscopy. The APB-like structure exhibited shifts along the (0 1 0)B19′, (0 0 1)B19′...
Sadahiro Tsurekawa, Yuta Chihara, Kyohei Tashima, Seiichiro Ii, Pavel Lej?ek
Journal of Materials Science   49 4698-4704   Jan 2014
Nanoindentation was used to study incipient plastic deformation in the vicinity of grain boundaries of different character in Fe-3 mass% Si alloy bicrystals and tricrystal. Pop-in events associated with the grain boundaries were observed in the lo...
M. Matsuda, K. Yamashita, S. Tsurekawa, K. Takashima, M. Nishida
Intermetallics   52 124-130   Jan 2014
We investigated the relationship between the microstructure and mechanical properties of ternary Co-Fe-Ni alloys. The solution-treated Co 50Fe40Ni10 alloy was composed of only the α′-phase having a B2 structure with a low degree of order, whereas ...
Shigeaki Kobayashi, Tatsuya Maruyama, Sakae Saito, Sadahiro Tsurekawa, Tadao Watanabe, Tadao Watanabe
Journal of Materials Science   49 4007-4017   Jan 2014
In situ observations of crack propagation in sulfur-doped coarse-grained nickel were performed for the specimens with grain boundary microstructure pre-determined by SEM/EBSD analysis. The role of grain boundary microstructure was studied in the c...
K. Hirayama, S. Ii, S. Tsurekawa
Scripta Materialia   69(11-12) 823-825   Dec 2013
As a response to the comment by St?ger-Pollach, we discuss the effect of the grain boundary segregation of oxygen on the local magnetic moment at the grain boundary in iron based on ab initio calculations. Oxygen at the grain boundary enhanced the...
Masakazu Baba, Sadahiro Tsurekawa, Kentaro Watanabe, W. Du, Kaoru Toko, Kosuke O. Hara, Noritaka Usami, Noritaka Usami, Takashi Sekiguchi, Takashi Suemasu, Takashi Suemasu
Applied Physics Letters   103    Oct 2013
Potential variations around the grain boundaries (GBs) on the surface in undoped n-BaSi2 epitaxial films on Si(111) and Si(001) were analyzed using Kelvin prove force microcopy. The potentials were higher at GBs than those in the BaSi2 grains on S...
Wataru Maruno, Yasuhiro Morizono, Sadahiro Tsurekawa
Materials Transactions   54(9) 1823-1828   Sep 2013
This study investigates how a magnetic field affects the α/γ transformation in FeCo alloys, particularly its entropy of transformation. Pure Fe, Fe9.5 at% Co alloy and Fe19.2 at% Co alloy were analyzed by differential scanning calorimetry in a mag...
Yasuhiro Morizono, Yuka Kawano, Yuka Kawano, Sadahiro Tsurekawa, Takateru Yamamuro
Materials Transactions   54(8) 1454-1459   Sep 2013
Commercially pure titanium plates were embedded in mixtures of steel and activated carbon powders and then heated at 1273K for 3.6 ks in a nitrogen flow. During this simplified treatment, a Ti(C, N) layer with a thickness of approximately 10μm for...
Takeshi Hikata, Soichiro Okubo, Yugo Higashi, Teruaki Matsuba, Risa Utsunomiya, Sadahiro Tsurekawa, Katsuhisa Murakami, Jun Ichi Fujita
AIP Advances   3(4) 042127   May 2013
We produced novel carbon nanofibers (CNFs) by oxidizing high-purity iron foil and then carburizing it in acetylene gas flow. This formed cracks in the heat-treated iron foil with CNFs bridging the two walls of each crack. The CNFs were drawn out f...
H. Kurishita, H. Arakawa, S. Matsuo, T. Sakamoto, S. Kobayashi, K. Nakai, G. Pintsuk, J. Linke, S. Tsurekawa, V. Yardley, K. Tokunaga, T. Takida, M. Katoh, A. Ikegaya, Y. Ueda, M. Kawai, N. Yoshida
Materials Transactions   54(4) 456-465   Apr 2013
Mitigation of embrittlement caused by recrystallization and radiation is the key issue of tungsten (W based materials for use in the advanced nuclear system such as fusion reactor applications. In this paper, our nanostructured W materials develop...
Sadahiro Tsurekawa, Hiroaki Takahashi, Yumi Nishibe, Tadao Watanabe
Philosophical Magazine   93(10-12) 1413-1424   Apr 2013
We used Kelvin probe force microscopy to measure the potential barrier associated with grain boundaries in B-doped p-type polycrystalline silicon. The potential barrier at non-contaminated grain boundaries varied approximately from 5 to 90 meV acc...
Gouki Yamada, Hiroyuki Kokawa, Yu Yasuda, Shun Tokita, Takashi Yokoyama, Yutaka S. Sato, Hiromichi T. Fujii, Sadahiro Tsurekawa
Philosophical Magazine   93(10-12) 1413-1424   Apr 2013
Control of grain boundary microstructure for grain boundary engineering (GBE) is effective to prevent intergranular corrosion by disconnection of corrosive random boundary network resulting from the introduction of coincidence site lattice boundar...
Seiichiro Ii, Kyosuke Hirayama, Kyohei Matsunaga, Hiromichi Fujii, Sadahiro Tsurekawa
Scripta Materialia   68(5) 253-256   Mar 2013
We have succeeded for the first time to directly measure the local magnetic moments in the vicinity of well-characterized grain boundaries in pure iron by electron energy loss spectroscopy on transmission electron microscope. The measured local ma...
M. Matsuda, Y. Iwamoto, Y. Morizono, S. Tsurekawa, K. Takashima, M. Nishida
Intermetallics   36 45-50   Feb 2013
We investigated the microstructural evolution during tensile deformation of ZrCo and ternary Zr-Co-Ni alloys with the aim of clarifying the mechanism of enhancement of ductility in these alloys. Some long and slender microcracks were present perpe...
Masakazu Baba, Sadahiro Tsurekawa, Kotaro Nakamura, Du Weijie, Shintaro Koike, Kaoru Toko, Kosuke O. Hara, Noritaka Usami, Noritaka Usami, Takashi Suemasu, Takashi Suemasu
Conference Record of the IEEE Photovoltaic Specialists Conference   535-538   Jan 2013
Grain boundaries (GBs) in a-axis-oriented semiconducting n-BaSi2 epitaxial films on Si(111) and Si(001) grown by molecular beam epitaxy were evaluated using Kelvin probe force microscopy. The GBs of n-BaSi2 on Si(111) has a higher electrostatic po...
Seiichiro Ii, Mitsuhiro Matsuda, Tomomasa Matsui, Towako Fujimoto, Akinori Kakisaka, Takafumi Kikutake, Sadahiro Tsurekawa, Ken Ichi Ikeda, Minoru Nishida
Intermetallics   31 65-71   Dec 2012
A method is proposed for controlling the grain boundary character distribution of high-temperature B2 phase in Ti-Ni-Fe alloys. The method utilizes the lattice correspondence between the deformation twins in B19′ martensite and the residual planar...
S. Kobayashi, T. Maruyama, S. Tsurekawa, T. Watanabe, T. Watanabe
Acta Materialia   60 6200-6212   Oct 2012
The effect of grain boundary microstructure on the fracture resistance of sulfur-doped polycrystalline nickel was investigated using specimens with different grain boundary microstructures to reveal the usefulness of grain boundary engineering for...
Yasuhiro Morizono, Sadahiro Tsurekawa, Takateru Yamamuro
Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan   98 476-481   Sep 2012
A ferritic stainless steel was embedded in mixtures of steel and activated carbon powders, and heated at 1273 K for 3.6 ks in flowing N 2. The specimen was quenched into the water after heating. This simplified treatment enabled the diffusion of c...
Pavel Lej?ek, Petra ?ed?, Petra ?ed?, Yu Kinoshita, Victoria Yardley, Victoria Yardley, Ale? J?ger, Sadahiro Tsurekawa
Journal of Materials Science   47(13) 5106-5113   Jul 2012
Experiments on growth and annealing of biand tricrystals of an Fe-6at.%Si model alloy are described in this study that investigates the behavior of (a) a free grain boundary in a bicrystal and (b) constrained grain boundaries at the triple junctio...
Mitsutaka Yoshimoto, Mitsutaka Yoshimoto, Yasuhiro Morizono, Sadahiro Tsurekawa, Tomoyuki Baba
Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan   120(7) 276-279   Jul 2012
Anodic oxidation of a pure Al plate was carried out in aqueous solutions containing sulfuric acid (H 2SO 4), oxalic acid (H 2C 2O 4) and a percarboxylic acid-based additive at temperatures between 273 and 293K for 0.6 to 9 ks under a constant curr...
Yasuhiro Morizono, Tomofumi Fukuyama, Tomofumi Fukuyama, Mitsuhiro Matsuda, Sadahiro Tsurekawa
Materials Transactions   52(12) 2178-2183   Dec 2011
A Ti plate coated with an Al foil with a thickness of 100 μm was prepared by using explosive energy. The bonding was momentarily achieved without breaking the Al foil. This Al-coated Ti plate was heated between 898 and 1273K in the air to investig...
Sadahiro Tsurekawa, Hiroki Hatao, Hirofumi Takahashi, Yasuhiro Morizono
Japanese Journal of Applied Physics   50    Sep 2011
Piezoelectric materials should have stable performance during electric cycling in service. Because piezoelectricity-related properties depend on the ferroelectric domain structure, it is essential to investigate the fatigue characteristics of doma...
M. Matsuda, T. Nishimoto, Y. Morizono, S. Tsurekawa, M. Nishida
Intermetallics   19(7) 894-899   Jul 2011
The relationship between the microstructures and the mechanical properties in the ternary Zr-Co-Pd alloys has been investigated. X-ray diffraction measurements at room temperature indicated that Zr50Co 50-xPdx alloys underwent martensitic transfor...
Mitsuhiro Matsuda, Takahiro Nishimoto, Kyohei Matsunaga, Yasuhiro Morizono, Sadahiro Tsurekawa, Minoru Nishida
Journal of Materials Science   46 4221-4227   Jun 2011
Microstructural evolution during tensile deformation in ternary Zr-Co-Ni alloys were investigated using transmission electron microscopy to clarify the mechanism of the enhancement of ductility observed in these alloys. In Zr 50Co39Ni11 alloy defo...
Shigeaki Kobayashi, Manabu Nakamura, Sadahiro Tsurekawa, Tadao Watanabe, Tadao Watanabe
Journal of Materials Science   46 4254-4260   Jun 2011
The effect of grain boundary microstructure on fatigue crack propagation in austenitic stainless steel was investigated in order to control fatigue crack propagation. The fraction of low-Σ coincidence boundaries in specimens was controlled by ther...
Y. Kinoshita, V. A. Yardley, V. A. Yardley, S. Tsurekawa
Journal of Materials Science   46(12) 4261-4269   Jun 2011
Tempered martensitic 9-12 wt% Cr ferritic steels are used as heat resistant materials in power plant, where service under conditions of high temperature and pressure for several decades is required, and an adequate resistance to creep is one of th...
Tatsuya Fukino, Sadahiro Tsurekawa, Yasuhiro Morizono
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science   42 587-593   Mar 2011
This article presents in-situ observation of ferrite (α)/austenite (γ) phase transformation in an Fe-8.5 at. pct Ni alloy deformed by rolling using an automated scanning electron microscopy/energy backscattered diffraction (SEM/EBSD) system. Durin...
Hiromichi Fujii, Hiromichi Fujii, Hiromichi Fujii, Sadahiro Tsurekawa
Physical Review B - Condensed Matter and Materials Physics   83(5) 054412   Feb 2011
This study was conducted with the aim of investigating the effect of magnetic fields on the carbon diffusion in pure iron. The Fe/Fe-0.87 mass% C diffusion couples prepared by explosive welding were annealed at temperatures from 850 to 1200 K with...
Shigeaki Kobayashi, Masashi Hirata, Sadahiro Tsurekawa, Tadao Watanabe, Tadao Watanabe
Procedia Engineering   10 112-117   Jan 2011
The roles of grain boundary microstructure in fatigue crack propagation during cyclic deformation were investigated in order to evidence the utility of grain boundary engineering for control of fatigue crack propagation in SUS304 austenitic stainl...
M. Matsuda, K. Kuramoto, Y. Morizono, S. Tsurekawa, E. Okunishi, T. Hara, M. Nishida
Acta Materialia   59 133-140   Jan 2011
An antiphase boundary (APB)-like structure of the B19′ martensite in Ti-Ni alloy was investigated by transmission electron microscopy. The APB-like structure shows atomic shifts on both the (0 1 0)B19′ plane along the c-axis and the (0 0 1)B19′ pl...
渡邉 英二, 森園 靖浩, 連川 貞弘
Copper and copper alloy   50(1) 253-258   2011
V. A. Yardley, T. Matsuzaki, R. Sugiura, A. T. Yokobori, S. Tsurekawa, Y. Hasegawa
Journal of Physics: Conference Series   240    Dec 2010
The region around the tip of a creep crack obtained using an interrupted test on a C(T) specimen of the 9 wt.% Cr power plant alloy P92 has been examined using electron backscatter diffraction to study the relationship between the crack morphology...
Sadahiro Tsurekawa, Kyosuke Inoue, Pavel Lej?ek
ISIJ International   50(4) 591-595   Jun 2010
Grain boundary migration under a magnetic field was studied using Fe-3mass%Si alloy bicrystals with (001)/Σ5 (φ=36°) and (001>/random (φ0=45°) tilt boundaries at temperatures between 1 223 K and 1 323 K. A capillarity method (Sun and Bauer method)...
S. Kobayashi, S. Tsurekawa, T. Watanabe, G. Palumbo
Scripta Materialia   62(5) 294-297   Mar 2010
Control of brittleness associated with segregation of sulfur to grain boundaries in ultrafine-grained nickel was investigated. The brittleness could be successfully improved by controlling the grain boundary microstructure. The specimens with a hi...
Changshu He, Sadahiro Tsurekawa, Hiroyuki Kokawa, Xiang Zhao, Liang Zuo
Materials Science Forum   638-642 2781-2786   Feb 2010
An AC magnetic field (0.5Tesla) is applied with the field direction perpendicular to the rolling direction during annealing of a 76% cold-rolled IF steel sheet. Microstructure and texture evolution in the as-annealed specimens were determined usin...
Pavel Lej?ek, Petra ?ed?, Petra ?ed?, Yu Kinoshita, Ale? J?ger, Victoria Yardley, Sadahiro Tsurekawa
METAL 2010 - 19th International Conference on Metallurgy and Materials, Conference Proceedings   340-343   Jan 2010
? 2010 TANGER Ltd., Ostrava.Grain Boundary Engineering is a modern concept for the production of polycrystalline materials with optimized properties. It is based on manipulation of the structure to increase the proportion of special grain boundari...
R. Sumi, N. Toda, H. Fujii, S. Tsurekawa
Reviews on Advanced Materials Science   21(1) 35-43   Dec 2009
We have investigated the effect of a magnetic field on grain boundary energy in a 99.9% Fe and an Fe-0.8at.%Sn alloy. The average grain boundary energy in the Fe-Sn alloy was increased by application of a magnetic field. The energy curves as a fun...
A. S. Gornakova, B. B. Straumal, B. B. Straumal, S. Tsurekawa, L. S. Chang, A. N. Nekrasov
Reviews on Advanced Materials Science   21(1) 18-26   Dec 2009
The wetting phase transition of grain boundaries (GBs) by the melt has been studied in the Zn - 6 wt.% Sn and Zn - 5.3 wt.% In polycrystals and Zn bicrystals (two [10 1? 0] tilt GBs with misorientation angles φ = 19° and 66°, and one [11 2? 0] til...
Sadahiro Tsurekawa, Tatsuya Fukino, Takashi Matsuzaki
International Journal of Materials Research   100(6) 800-805   Dec 2009
An in-situ SEM/EBSD technique has been applied to observe initial-stage and late-stage abnormal grain growth in electrodeposited nanocrystalline nickel with the aim of obtaining a comprehensive understanding of the dynamics of abnormal grain growt...
MATSUDA Mitsuhiro, KURAMOTO Kazuhiko, MORIZONO Yasuhiro, TSUREKAWA Sadahiro, HARA Toru, NISHIDA Minoru
Bulletin of the Japan Institute of Metals   48(12) 596   Dec 2009
Takenao Nemoto, Tatsuya Fukino, Sadahiro Tsurekawa, Xun Gu, Akinobu Teramoto, Tadahiro Ohmi, Tadahiro Ohmi
Japanese Journal of Applied Physics   48 066507-1-066507-8   Jun 2009
In situ observations using an automated electron backscatter diffraction (EBSD) system with a heating stage were carried out to clarify the mechanism of grain growth on electroplated Cu and Cu deposited by physical vapor deposition (PVD). Hardness...
Tadao Watanabe, Tadao Watanabe, Sadahiro Tsurekawa, Yudong Zhang, Xiang Zhao, Liang Zuo, Claude Esling
Ceramic Transactions   200 421-433   Dec 2008
Recent achievements of the texturing and grain boundary engineering (GBE) by magnetic field application have been introduced. The versatility and high potential of magnetic field application have been effectively utilized as non-contacting process...
Shigeaki Kobayashi, Sadahiro Tsurekawa, Tadao Watanabe, Tadao Watanabe
Ceramic Transactions   201 681-692   Dec 2008
The evolution of grain boundary microstructures in bcc molybdenum polycrystals produced by thermomechanical processing from single crystals was investigated to obtain a clue to grain boundary engineering of bcc metals. Molybdenum single crystals w...
Hirofumi Takahashi, Yoshiki Numamoto, Junji Tani, Sadahiro Tsurekawa
A Global Road Map for Ceramic Materials and Technologies: Forecasting the Future of Ceramics, International Ceramic Federation - 2nd International Congress on Ceramics, ICC 2008, Final Programme      Dec 2008
The authors reported the possibility of improvements in the piezoelectric characteristics of barium titanate (BaTiO3), which is a non lead-based piezoelectric material produced by microwave (MW) sintering. Since conventional sintering results in t...
Tatsuya Fukino, Tatsuya Fukino, Sadahiro Tsurekawa
Materials Transactions   49 2770-2775   Dec 2008
The in-situ SEM/EBSD technique has been applied to observe the dynamics of ferrite(α) → austenite(γ) phase transformation and to examine the orientation relationship between α and γ phases in an Fe-9.5 at% Ni alloy. Random grain boundaries and gra...
Shigeaki Kobayashi, Sadahiro Tsurekawa, Tadao Watanabe, Tadao Watanabe
17th European Conference on Fracture 2008: Multilevel Approach to Fracture of Materials, Components and Structures   1 733-740   Dec 2008
The effects of grain boundary microstructures, such as grain boundary character distribution (GBCD), grain boundary connectivity and triple junction distribution (TJD), on cavity nucleation and crack propagation in an Al-Li-Cu-Mg-Zr alloy during s...
Hirofumi Takahashi, Yoshiki Numamoto, Junji Tani, Sadahiro Tsurekawa
Japanese Journal of Applied Physics   47 8468-8471   Nov 2008
A decrease in the domain size of barium titanate (BaTiO3) improves the piezoelectric constant (?/33). Other considerations suggest the high d33 of BaTiO3 may be caused by the enhanced high dielectric constant (ε33T/ε0) at room temperature due to t...
Shigeaki Kobayashi, Sadahiro Tsurekawa, Tadao Watanabe
Materials Science and Engineering A   483-484 712-715   Jun 2008
Structure-dependent grain boundary hardening and triple junction hardening were investigated in connection with plastic deformation and fracture in polycrystalline molybdenum with different carbon contents by the microindentation test. Low-angle a...
Hiromichi Fujii, Victoria A. Yardley, Takashi Matsuzaki, Sadahiro Tsurekawa
Journal of Materials Science   43 3837-3847   Jun 2008
The effect of a magnetic field on the nature of nanocrystallization from a melt-spun Fe73.5Si13.5B9Nb3Cu 1 amorphous precursor has been studied with the aim of controlling microstructures and magnetic properties. Annealing for magnetic crystalliza...
Shigeaki Kobayashi, Toshiyuki Inomata, Hiroyuki Kobayashi, Sadahiro Tsurekawa, Sadahiro Tsurekawa, Tadao Watanabe, Tadao Watanabe
Journal of Materials Science   43 3792-3799   Mar 2008
The effects of grain boundary- and triple junction-character on intergranular fatigue crack nucleation were studied in coarse-grained polycrystalline aluminum specimens whose grain boundary microstructures were analyzed by SEM-EBSD/OIM technique. ...
S. Kobayashi, S. Tsurekawa, T. Watanabe, A. Kobylanski
Philosophical Magazine   88 489-509   Feb 2008
The formation of grain structures and grain boundary microstructures in polycrystalline molybdenum, produced by thermomechanical processing from cylindrical single crystals with different initial surface normal orientations of 110, 111 and 112, we...
Sadahiro Tsurekawa, Sadahiro Tsurekawa, Kouichi Kawahara, Hideharu Nakashima
Precursor-Derived Ceramics: Synthesis, Structures and High Temperature Mechanical Properties   260-269   Dec 2007
? WILEY-VCH Verlag GmbH, 1999. All rights reserved.A review is given on our recent investigations concerning the high temperature deformation mechanism of covalent bonded ceramics, titanium carbide (TiC) and silicon carbide (SiC). Particular atten...
V. A. Yardley, V. A. Yardley, R. Sugiura, T. Matsuzaki, S. Tsurekawa, A. T. Yokobori, Y. Hasegawa
Strength, Fracture and Complexity   5 39-52   Dec 2007
Ferritic/martensitic steels for use in power generation, such as the modified 9-12 wt% Cr alloy P92, are required to withstand temperatures of 450-600°C or more for several decades. Under such conditions, one major failure mode is creep fracture, ...
Tadao Watanabe, Tadao Watanabe, Kota Kido, Sadahiro Tsurekawa, Kolch Kawahara
Materials Science Forum   558 - 559 834-850   Dec 2007
A new approach to grain boundary engineering for photovoltaic polysilicon has been attempted using a new processing method of unidirectional and rotational solidification from the melt, in order to control the grain boundary microstructure and to ...
S. Tsurekawa, H. Fujii, V. A. Yardley, T. Matsuzaki, T. Watanabe
Materials Science Forum   559 - 559 1371-1376   Dec 2007
Crystallization kinetics and texture evolution in iron-based amorphous alloys (Fe78Si9B13, Fe73.5Si 13.5B9Nb3Cu1) under a magnetic field have been studied. We have found that the application of a magnetic field during crystallization at a temperat...
Sadahiro Tsurekawa, Shinya Nakamichi, Tadao Watanabe
Materials Science Forum   539 ? 543 2371-2376   Dec 2007
Grain boundary engineering through the control of grain boundary character distribution (GBCD) has been extensively employed as a powerful tool for achieving enhanced properties and for development of high performance both structural and functiona...
Victoria A. Yardley, Sadahiro Tsurekawa, Sadahiro Tsurekawa, Hiromichi Fujii, Hiromichi Fujii, Takashi Matsuzaki
Materials Transactions   48 2826-2832   Nov 2007
Recent work has shown that annealing amorphous alloys under an applied magnetic field can enhance the fraction of nanocrystalline phase formed and induce a strong texture. This effect has been attributed to the displacement of thermodynamic equili...
Hirofumi Takahashi, Yoshiki Numamoto, Junji Tani, Sadahiro Tsurekawa
Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers   46(10) 7044-7048   Oct 2007
It has been known that barium titanate (BaTiO3) causes abnormal grain growth during conventional sintering utilizing resistance heating. The grain growth of barium titanate induced using by a hydrothermal synthesis method is controlled using micro...
Sadahiro Tsurekawa, Kota Kido, Tadao Watanabe
Materials Science and Engineering A   462 61-67   Jul 2007
Importance of polycrystalline silicon has been recognized in the electronic device technology. The interfacial states in the band-gap and potential barrier associated with grain boundaries in polycrystalline silicon can exert their detrimental inf...
T. Watanabe, T. Watanabe, S. Tsurekawa, S. Kobayashi, X. Zhao, L. Zuo
Key Engineering Materials   345-346 I 619-624   May 2007
In last two decades it has been extensively studied whether the grain boundary engineering can be effectively applied to controlling intergranular fracture and brittleness of different kinds of brittle materials. Grain boundary engineering has bee...
S. Tsurekawa, K. Ibaraki, K. Kawahara, T. Watanabe
Scripta Materialia   56 577-580   Apr 2007
The continuity of ferroelectric domain structures across grain boundaries in lead zirconate titanate was observed and discussed in connection with grain-boundary character based on the coincidence site lattice and plane-matching models. The domain...
Ryusuke Nakamura, Kyosuke Yoshimi, Sadahiro Tsurekawa
Materials Science and Engineering A   448-451 1036-1040   Mar 2007
The formation of vacancy complexes through aging heat treatments between 800 and 1200 K was studied for rapidly solidified NiAl and CoAl ribbons using TEM. In the case of the NiAl ribbons, the density of dislocations decreased with increasing anne...
S. Kobayashi, S. Tsurekawa, T. Watanabe
Philosophical Magazine   86 5419-5429   Nov 2006
The roles of grain boundaries and triple junctions in crack nucleation and propagation in polycrystalline molybdenum are discussed in connection with grain boundary and triple junction hardening. Hardness measurements were made by microindentation...
TSUREKAWA Sadahiro, KIDO Kota, WATANABE Tadao
Bulletin of the Japan Institute of Metals   45(10) 734-737   Oct 2006
Hirofumi Takahashi, Yoshiki Numamoto, Junji Tani, Sadahiro Tsurekawa
Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers   45 7405-7408   Sep 2006
Hydrothermally synthesized BaTiO3 powders with nanoscale-sized particles were densified by microwave sintering. A sintered sample of the nanopowder fabricated by hydrothermal synthesis has a high piezoelectric constant d33 due to fabrication by mi...
Sadahiro Tsurekawa, Shinya Nakamichi, Tadao Watanabe
Acta Materialia   54 3617-3626   Aug 2006
The connectivity of grain boundaries can be an important microstructural parameter governing the bulk properties of polycrystalline materials as well as the grain boundary character distribution. On the basis of the percolation theory, the connect...
T. Watanabe, T. Watanabe, S. Tsurekawa, X. Zhao, L. Zuo
Scripta Materialia   54 969-975   Mar 2006
A new vision, involving the use of magnetic fields to engineer grain boundaries, is proposed on the basis of recent observations. It is shown that the properties associated with grain boundaries can be manipulated by applying magnetic fields durin...
H. Fujii, S. Tsurekawa, T. Matsuzaki, T. Watanabe
Philosophical Magazine Letters   86 113-122   Feb 2006
The effect of magnetic crystallization on texture evolution and control in nanocrystalline materials has been studied using a melt-spun amorphous Fe 78 Si 9 B 13 alloy. The magnetic crystallization was conducted at temperatures ranging from 653 to...
Hirofumi Takahashi, Yoshiki Numamoto, Junji Tani, Kazuya Matsuta, Jinhao Qiu, Sadahiro Tsurekawa
Japanese Journal of Applied Physics, Part 2: Letters   45 L30-L32   Jan 2006
A lead-free barium titanate (BaTiO3) ceramics with a high density and a large piezoelectric constant, d33, as manufactured at 1320°C by microwave sintering, using a pure fine powder with a particle size of 100 nm produced by hydrothermal synthesis...
T. Watanabe, S. Tsurekawa, H. Fujii, T. Kanno
Materials Science Forum   495 - 497 1151-1158   Dec 2005
This paper gives an overview of our recent works on the effect of magnetic annealing, i.e. annealing in a magnetic field, on the evolution of texture and grain boundary microstructure in ultra-fine grained and nanocrystalline magnetic materials di...
Tadao Watanabe, Sadahiro Tsurekawa
Materials Science Forum   482 55-62   Dec 2005
This paper discusses micropstructural aspects of brittleness fracture of polycrystalline materials caused by intergranular fracture. Structure-dependent intergranular brittle fracture in bicrystals and polycrystals are discussed and predicted theo...
Tadao Watanabe, Sadahiro Tsurekawa, Shigeaki Kobayashi, Shin Ichi Yamaura
Materials Science and Engineering A   410 - 411 140-147   Nov 2005
This paper gives an overview of structure-dependent intergranular deformation and fracture of metallic bicrystals and polycrystals at high temperatures. Structure-dependent grain boundary sliding and migration during high temperature deformation a...
Tadao Watanabe, Tadao Watanabe, Kouichi Obara, Sadahiro Tsurekawa, G?nter Gottstein
Zeitschrift fuer Metallkunde/Materials Research and Advanced Techniques   96 1196-1203   Oct 2005
On the basis of in-situ observations of the α/γ phase transformation in an iron-4.2 at.% Cr alloy, it was found that triple junctions with more random boundaries can be preferential sites for nucleation and that a two-stage migration of α/γ interp...
Kyosuke Yoshimi, Akira Yamauchi, Ryusuke Nakamura, Sadahiro Tsurekawa, Shuji Hanada
Materials Research Society Symposium Proceedings   842 449-454   Aug 2005
The effect of heat treatments (aging or annealing) on microstructure was investigated for rapidly solidified ribbons of near-stoichiometric TiCo. In as-spun ribbons, it was observed by TEM that an equiaxed grain structure was developed and its cry...
S. Nakamichi, S. Tsurekawa, Y. Morizono, T. Watanabe, M. Nishida, A. Chiba
Journal of Materials Science   40 3191-3198   Jun 2005
The diffusion coefficients of carbon and titanium in γ -iron were measured in a 6T magnetic field and in magnetic field gradients ranging from 30 to 45 T/m. We have found that the diffusion of carbon in γ -iron is retarded by application of a 6T m...
Kyosuke Yoshimi, Minseok Sung, Sadahiro Tsurekawa, Akira Yamauchi, Ryusuke Nakamura, Shuji Hanada, Koichi Kawahara, Tadao Watanabe
Materials Science Forum   475 - 479 849-852   Apr 2005
Substructure development through aging and annealing treatments was studied for rapidly solidified TiCo ribbons using TEM. In as-spun ribbons, equiaxed grain structure was developed and its crystal structure was B2-ordered immediately after melt-s...
Koichi Kawahara, Koichi Kawahara, Ken Ichiro Ibaraki, Sadahiro Tsurekawa, Tadao Watanabe
Materials Science Forum   475-479 3871-3874   Apr 2005
The stability of the plane matching boundary is discussed in connection with the deviation from the exact plane matching orientation and the atomic density per unit area of the lattice plane. The statistic calculation of the plane matching boundar...
R. Ishibashi, T. Horiuchi, J. Kuniya, M. Yamamoto, S. Tsurekawa, H. Kokawa, T. Watanabe, T. Shoji
Materials Science Forum   475 - 479 3863-3866   Apr 2005
The effect of grain boundary character distribution (GBCD) on intergranular stress corrosion cracking (IGSCC) in austenitic stainless steels in high temperature water was verified experimentally. GBCD control using the strain annealing method incr...
T. Watanabe, S. Tsurekawa
Journal of Materials Science   40 817   Feb 2005

Conference Activities & Talks

 
Control of low-angle boundary network for improving high-cycle fatigue in 430 ferritic stainless steel
S. Kobayashi, S. Tsurekawa
Intergranular and Interphase Boundaries in Materials   1 Jul 2019   
Critical stress required to propagate yield past the grain boundary
S. Tsurekawa, D. A. Molodov, P. Lejcek
Intergranular and Interphase Boundaries in Materials   1 Jul 2019   
Structure-Dependent Local Mechanical Properties Near the Grain Boundaries in Aluminum Bicrystals [Invited]
Sadahiro Tsurekawa, Tokuda Yoshiyuki, Molodov Dmitri
International Conference on Processing & Manufacturing of Advanced Materials (THERMEC'2018)   9 Jul 2018   
Grain Boundary Engineering Based on Fractal analysis for Control of intergranular Corrosion in Metallic Materials
Shigeaki Kobayashi, Yang Weitao, Okada Rei, Tsurekawa Sadahiro
International Conference on Processing & Manufacturing of Advanced Materials (THERMEC'2018)   9 Jul 2018   
In-situ TEM Observation of Dislocation-Grain Boundary interaction in Aluminum [Invited]
Seiichiro Ii, Enami Takero, Ohmura Takahito, Tsurekawa Sadahiro
International Conference on PROCESSING & MANUFACTURING OF ADVANCED MATERIALS Processing, Fabrication, Properties, Applications (THERMEC'2018)   9 Jul 2018   
Real time analysis of dislocation motion and mechanical response in pure aluminum bicrystal using in-situ deformation in TEM
T. Enami, S. II, T. Ohmura; S. Tsurekawa
6th International Indentation Workshop   1 Jul 2018   
Evaluation of mechanical properties of Mo5SiB2 via micropillar compression and nanoindentation
T. Yoshida, S. Uemura, K. Yoshimi, S. Tsurekawa
6th International Indentation Workshop   1 Jul 2018   
Challenge of grain boundary plane engineering towards enhancing bulk properties of polycrystalline materials
T. Kitagawa, P. Lejcek, T. Yamamuro, S. Tsurekawa
23 Jun 2018   
Effect of high magnetic field on diffusion of cobalt in copper
Z. Zhang, T. Yamamuro, X. Zhao, S. Tsurekawa
23 Jun 2018   
Local mechanical properties near [1010] symmetric tilt grain boundaries in pure Zn bicrystals
M. Tashiro, S. Tsurekawa
23 Jun 2018   
Measurement of Local Mechanical Properties of T91 Steel Corroded by Molten Lead-Bismuth Eutectic Alloy via Micropillar Compression Test
K. Kaede, A. Jäger, V. Gärtnerová, C. Takushima, T. Yamamuro, S. Tsurekawa
2017 MRS Fall Meeting & Exhibit   26 Nov 2017   
Anomalous grain growth in sulfur-doped nickel [Invited]
Sadahiro Tsurekawa, On Yamasaki
14th International Symposium on Physics of Materials (ISPMA14)   10 Sep 2017   
Quantitative evaluation and 3-dimensional analysis of microstructure in Mo-Si-B-TiC alloy
S. Uemura, T. Yamamuro, J. W. Kim, Y. Morizono, S. Tsurekawa, K. Yoshimi
International Conference on Frontiers in Materials Processing, Applications, Research & Technology (FiMPART'2017)   9 Jul 2017   
Enhancement of Creep Strength of Ferritic-Martensitic Steel T91 via Grain Boundary Engineering
S. Tsurekawa, R. Ishii, Y. Morizono
9th Pacific Rim International Conference on Advanced Materials and Processing (PRICM9)   5 Aug 2016