TAKAKUWA Osamu

J-GLOBAL         Last updated: Nov 13, 2019 at 14:44
 

Research Areas

 
 

Academic & Professional Experience

 
Apr 2012
 - 
Sep 2016
Assistant Professor, Tohoku University Graduate School of Engineering, Department of Finemechanics, Materials Physics and Engineering,Intelligent Sensing of Materrials
 

Committee Memberships

 
2013
   
 
自動車技術会東北支部学生自動車研究会  参与
 

Awards & Honors

 
2014
日本機械学会奨励賞(研究)
 
2013
日本ウォータージェット学会論文賞
 
2013
日本材料学会優秀講演発表賞
 
2012
東北大学総長賞
 
2007
日本機械学会フェロー賞若手優秀講演
 

Misc

 
Yuhei Ogawa, Osamu Takakuwa, Saburo Okazaki, Koichi Okita, Yusuke Funakoshi, Hisao Matsunaga, Saburo Matsuoka
Corrosion Science   161    Dec 2019
© 2019 Elsevier Ltd The role of hydrogen in tensile ductility loss and on the fracture behaviours of Ni-based superalloy 718 was investigated via tensile tests under hydrogen-charged conditions (internal hydrogen) or in gaseous hydrogen environmen...
Kentaro Wada, Junichiro Yamabe, Yuhei Ogawa, Osamu Takakuwa, Takashi Iijima, Hisao Matsunaga
Materials Science and Engineering A   766    Oct 2019
© 2019 Elsevier B.V. In order to clarify the contribution of dislocation‒hydrogen interaction on the hydrogen embrittlement (HE) of pure Ni and of Cu‒55 wt% Ni binary alloy, slow strain rate tensile (SSRT) tests were conducted at room temperature ...
Jean Gabriel Sezgin, O. Takakuwa, H. Matsunaga, Junichiro Yamabe
Engineering Fracture Mechanics   216    Jul 2019
© 2019 Elsevier Ltd Three effects of hydrogen have been reported on an austenitic stainless steel (Type-316L), a Cr-Mo steel (JIS-SCM435) and a carbon steel (JIS-SGP) during slow strain rate tensile (SSRT) tests performed in air on H-charged, smoo...
Domas Birenis, Yuhei Ogawa, Hisao Matsunaga, Osamu Takakuwa, Junichiro Yamabe, Øystein Prytz, Annett Thøgersen
Materials Science and Engineering A   756 396-404   May 2019
© 2019 Elsevier B.V. Elasto-plastic fracture toughness tests of a commercially pure iron were performed in air and in hydrogen gas at two different pressures. Some unique characteristics of hydrogen-enhanced cracking were exhibited at both the mac...
Kevinsanny, Saburo Okazaki, Osamu Takakuwa, Yuhei Ogawa, Koichi Okita, Yusuke Funakoshi, Junichiro Yamabe, Saburo Matsuoka, Hisao Matsunaga
Fatigue and Fracture of Engineering Materials and Structures   42 1203-1213   May 2019
© 2019 Wiley Publishing Ltd. Tension-compression fatigue tests were performed on two types of Ni-based superalloy 718 with different microstructures in which small artificial defects of various sizes and shapes were introduced. The susceptibility ...
Osamu Takakuwa, Yuhei Ogawa, Junichiro Yamabe, Hisao Matsunaga
Materials Science and Engineering A   739 335-342   Jan 2019
© 2018 Elsevier B.V. A brittle-like faceted morphology of a precipitation-strengthened Fe-Ni-Cr-based superalloy after charging via exposure to high-pressure hydrogen gas (100 MPa) at elevated temperature (543 K) was interpreted based on multiple ...
Eric Maire, Stanislas Grabon, Jérôme Adrien, Pablo Lorenzino, Yuki Asanuma, Osamu Takakuwa, Hisao Matsunaga
Materials   12    Jan 2019
© 2019 by the authors. Hydrogen energy is a possible solution for storage in the future. The resistance of packaging materials such as stainless steels has to be guaranteed for a possible use of these materials as containers for highly pressurized...
Yuhei Ogawa, Saburo Okazaki, Osamu Takakuwa, Hisao Matsunaga
Scripta Materialia   157 95-99   Dec 2018
© 2018 Fatigue crack growth (FCG) tests were performed with two types of metastable austenitic stainless steels having different austenite phase stabilities under hydrogen-precharged conditions (internal hydrogen) and in gaseous hydrogen environme...
Domas Birenis, Yuhei Ogawa, Hisao Matsunaga, Osamu Takakuwa, Junichiro Yamabe, Øystein Prytz, Annett Thøgersen
Acta Materialia   156 245-253   Sep 2018
© 2018 Acta Materialia Inc. A new model for hydrogen-assisted fatigue crack growth (HAFCG) in BCC iron under a gaseous hydrogen environment has been established based on various methods of observation, i.e., electron backscatter diffraction (EBSD)...
Saburo Matsuoka, Osamu Takakuwa, Saburo Okazaki, Michio Yoshikawa, Junichiro Yamabe, Hisao Matsunaga
Scripta Materialia   154 101-105   Sep 2018
© 2018 Acta Materialia Inc. The peculiar temperature dependence of hydrogen-enhanced fatigue crack growth (HEFCG) of low-carbon steel in hydrogen gas was successfully interpreted in terms of ‘trap-site occupancy’ of hydrogen. HEFCG decreased with ...
Yuhei Ogawa, Domas Birenis, Hisao Matsunaga, Osamu Takakuwa, Junichiro Yamabe, Øystein Prytz, Annett Thøgersen
Materials Science and Engineering A   733 316-328   Aug 2018
© 2018 Elsevier B.V. Hydrogen-assisted fatigue crack growth (HAFCG) in pure iron at a relatively low stress intensity range exhibits brittle-like intergranular (IG) fracture, while the macroscopic crack acceleration is not significant. The present...
Yuhei Ogawa, Domas Birenis, Hisao Matsunaga, Osamu Takakuwa, Junichiro Yamabe, Øystein Prytz, Annett Thøgersen
MATEC Web of Conferences   165    May 2018
© The Authors, published by EDP Sciences, 2018. The role of hydrogen on intergranular (IG) fracture in hydrogen-assisted fatigue crack growth (HAFCG) of a pure iron at low stress intensity was discussed in terms of the microscopic deformation stru...
Domas Birenis, Yuhei Ogawa, Hisao Matsunaga, Osamu Takakuwa, Junichiro Yamabe, Øystein Prytz, Annett Thøgersen
MATEC Web of Conferences   165    May 2018
© The Authors, published by EDP Sciences, 2018. Hydrogen effect on fatigue performance at relatively high values of stress intensity factor range, ΔK, of pure BCC iron has been studied with a combination of various electron microscopy techniques. ...
Jean Gabriel Sezgin, Osamu Takakuwa, Hisao Matsunaga, Junichiro Yamabe
Procedia Structural Integrity   13 1615-1619   Jan 2018
© 2018 The Authors. The aim of this study is to provide a quantification of the internal pressure contribution to the SSRT properties of H-charged Type-316L steel tested in air at room temperature. Considering pre-existing penny-shaped voids, the...
Osamu Takakuwa, Michio Yoshikawa, Saburo Matsuoka, Junichiro Yamabe, Saburo Okazaki, Hisao Matsunaga
American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP   6B-2018    Jan 2018
Copyright © 2018 ASME. In order to elucidate the temperature dependence of hydrogen-enhanced fatigue crack growth (FCG), the FCG test was performed on low-alloy Cr-Mo steel JIS-SCM435 according to ASTM E647 using compact tension (CT) specimen unde...
Domas Birenis, Yuhei Ogawa, Hisao Matsunaga, Osamu Takakuwa, Øystein Prytz, Junichiro Yamabe, Annett Thøgersen
American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP   6B-2018    Jan 2018
Copyright © 2018 ASME. Hydrogen effect on fatigue performance of commercially pure BCC iron has been studied with a combination of various electron microscopy techniques. The fatigue crack growth (FCG) in gaseous hydrogen was found to consist of t...
Osamu Takakuwa, Junichiro Yamabe, Hisao Matsunaga, Yoshiyuki Furuya, Saburo Matsuoka
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science   48 5717-5732   Nov 2017
© 2017, The Minerals, Metals & Materials Society and ASM International. Hydrogen-induced ductility loss and related fracture morphologies are comprehensively discussed in consideration of the hydrogen distribution in a specimen with external and...
Yuhei Ogawa, Domas Birenis, Hisao Matsunaga, Annett Thøgersen, Øystein Prytz, Osamu Takakuwa, Junichiro Yamabe
Scripta Materialia   140 13-17   Nov 2017
© 2016 Elsevier Ltd In order to study the influence of hydrogen on plastic deformation behavior in the vicinity of the fatigue crack-tip in a pure iron, a multi-scale observation technique was employed, comprising electron channeling contrast imag...
Hisao Matsunaga, Osamu Takakuwa, Junichiro Yamabe, Saburo Matsuoka
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences   375    Jul 2017
© 2017 The Author(s) Published by the Royal Society. All rights reserved. In the context of the fatigue life design of components, particularly those destined for use in hydrogen refuelling stations and fuel cell vehicles, it is important to under...
Junichiro Yamabe, Osamu Takakuwa, Hisao Matsunaga, Hisatake Itoga, Saburo Matsuoka
International Journal of Hydrogen Energy   42 13289-13299   May 2017
© 2017 Hydrogen Energy Publications LLC The effects of external and internal hydrogen on the slow-strain-rate tensile (SSRT) properties at room temperature were studied for ten types of solution-treated austenitic stainless steels containing a sma...
Osamu Takakuwa, Junichiro Yamabe, Hisao Matsunaga, Yoshiyuki Furuya, Saburo Matsuoka
American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP   6B-2017    Jan 2017
Copyright © 2017 ASME. Slow-strain rate tensile (SSRT) tests on various metals having γ-Fe phase; Type 304 and 316L stainless steels, HP160 high strength stainless steel, and A286 Fe-based super alloy were conducted in external hydrogen and with i...
Junichiro Yamabe, Osamu Takakuwa, Tohru Awane, Saburo Matsuoka
American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP   6B-2017    Jan 2017
Copyright © 2017 ASME. The paper presents the hydrogen-entry, tensile, and fatigue properties of a precipitation-hardened martensitic stainless steel, JIS-SUS630, with a newly developed coating, whose thickness ranges from 10 to 20 μm. The newly d...
O. Takakuwa, T. Fujisawa, H. Soyama
International Journal of Hydrogen Energy   41 23188-23195   Dec 2016
© 2016 Hydrogen Energy Publications LLC We employed X-ray diffraction using collimated X-rays to quantitatively evaluate the local hydrogen concentration behavior in metals. Hydrogen concentrating around a crack tip significantly accelerates crack...
O. Takakuwa, F. Takeo, M. Sato, H. Soyama
Surface and Coatings Technology   307 200-205   Dec 2016
© 2016 Elsevier B.V. The purpose of this study is to examine the effect of peening on the fatigue life of a duralumin plate containing a hole with rounded edges. To this end, duralumin plates containing holes with rounded edges with a radius of 0....
Osamu Takakuwa, Masaaki Nakai, Kengo Narita, Mitsuo Niinomi, Kazuhiro Hasegawa, Hitoshi Soyama
International Journal of Fatigue   92 360-367   Nov 2016
© 2016 Elsevier Ltd The surface treatment technology known as ‘cavitation peening’ was employed in this study in order to enhance the durability of spinal implant fixture applications, which are subject to fretting fatigue. Cavitation peening can ...
O. Takakuwa, H. Soyama
23rd International Conference on Water Jetting 2016   215-221   Jan 2016
© BHR Group 2016 Water Jetting Hydrogen diffuses quickly in metals, making them brittle and accelerating crack propagation. Controlling the mobility of hydrogen in metals is one of the key factors used to prevent hydrogen embrittlement. If the hyd...
Using Cavitation Peening to Improve the Fatigue Life of Titanium Alloy Ti-6Al-4V Manufactured by Electron Beam Melting
Mitsuru Sato, Osamu Takakuwa, Masaaki Nakai, Mitsuo Niinomi, Fumio Takeo and Hitoshi Soyama
Materials Sciences and Applications   7(4)    2016
水噴流加速式循環型ショットピーニングによるステンレス鋼の下限界応力拡大係数範囲の増大
内藤 暁馬,髙桑脩,祖山均
噴流工学   32(1) 4-9   2016
Osamu Takakuwa and Hitoshi Soyama
Advanced in Chemical Engineering and Science   5(1) 62-71   2015
Osamu Takakuwa, Akihiko Chiba and Hitoshi Soyama
Materials Sciences and Applications   6(2) 140-144   2015
眞野優太,髙桑脩,祖山均
日本機械学会論文集   81(823)    2015
髙桑脩,眞野優太,祖山均
日本機械学会論文集   81(824)    2015
Osamu Takakuwa and Hitoshi Soyama
The Journal of Engineering      2015
Hitoshi Soyama, Naoki Kumagai, Osamu Takakuwa and Fumio Takeo
The Journal of Engineering      2015
O. Takakuwa, Y. Mano, H. Soyama
International Journal of Hydrogen Energy   39(11) 6095-6103   Apr 2014
In order to determine the effect of hydrogen on the local yield stress near the surface of austenitic stainless steel, an indentation test combined with inverse problem analysis was employed. For austenitic stainless steel, the indentation test is...
Satoshi Nishimura, Osamu Takakuwa, Hitoshi Soyama
Fluid Mechanics and its Applications   106 283-302   Jan 2014
© Springer Science+Business Media Dordrecht 2014 In order to estimate cavitation erosion rate in hydraulic machinery the erosion resistance of materials can be investigated using a cavitating jet apparatus, standardized by ASTM G134. As the jet ag...
Osamu Takakuwa, Yuta Mano, Hitoshi Soyama
American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP   28280 1-6   Jan 2014
Copyright © 2014 by ASME. In order to reveal the effect of indentation load on Vickers hardness of austenitic stainless steel after hydrogen charging, the Vickers hardness measurements have been conducted with three different indentation load of 0...
Osamu Takakuwa, Yuta Mano, Hitoshi Soyama
Advanced Materials Research   936 1298-1302   Jan 2014
The objective of this study is to evaluate the effect of hydrogen on the micro- and macro-strain of austenitic stainless steel using X-ray diffraction. When hydrogen is trapped in lattice sites, it can affect both the micro- and macro-strain. The ...
K. Hasuda, O. Takakuwa, H. Soyama
Solid-State Electronics   91 130-136   Jan 2014
In this paper, we demonstrate that improvements in the Cu2O film quality and consequently the output power of Cu2O/Cu solar cells can be achieved by decreasing the load current density used in production of the film by anodic oxidation. Cu2O films...
脊椎固定用インプラントロッドへの水噴流加速式循環型ショットピーニングの適用
髙桑脩,祖山均
噴流工学   31(1) 20-27   2014
The Interaction between Hydrogen and Surface Stress in Stainless Steel
Osamu Takakuwa, Yuta Mano and Hitoshi Soyama
Proceedings of the 12th International Conference on Material Science and Engineering Technology   1285-1289   2014
Reduction of Hydrogen Embrittlement Cracking of Stainless Steel SUS316L by Cavitation Peening
Hitoshi Soyama and Osamu Takakuwa
Proceedings of the International Congress (APCF/SIF-2014)   401-405   2014
髙桑脩,左奈田一将,祖山均
日本機械学会論文集   80(810) SMM0022   2014
Yoshiteru Aoyagi, Yusuke Kawaragi, Ai Tokue, Chikahiro Ohkubo, Osamu Takakuwa, Hitoshi Soyama
Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A   79 1019-1029   Aug 2013
Shot peening is one of the most effective techniques for surface modification. Fatigue strength of dental prosthesis is increased by the peening introducing compressive residual stress and work-hardening into sub-surface of metallic materials. In ...
Osamu Takakuwa, Kouhei Yamamiya and Hitoshi Soyama
Journal of Solid Mechanics and Materials Engineering   7(3) 357-371   2013
Osamu Takakuwa and Hitoshi Soyama
Advances in Materials Physics and Chemistry   3(1A) 8-18   2013
Enhancing the Resistance to Fatigue Crack Growth in Steel Accelerated due to Hydrogen Charging by Cavitation Peening
O. Takakuwa, H. Soyama
Metal Finishing News   14(4) 62-65   2013
Osamu Takakuwa, Amrinder S. Gill, Gokul Ramakrishnan, Seetha R. Mannava, Vijay K. Vasudevan and Hitoshi Soyama
Materials Science and Applications   4(7A2) 23-28   2013
Osamu Takakuwa, Yusuke Kawaragi and Hitoshi Soyama
Journal of Surface Engineered Materials and Advanced Technology   3(4) 262-268   2013
O. Takakuwa, M. Nishikawa, H. Soyama
Energy Materials: Materials Science and Engineering for Energy Systems   6 1422-1426   Dec 2012
Cavitation peening (CP), which utilises the impact caused by cavitation bubbles collapsing, can improve the fatigue strength of metallic materials as well as the yield stress and tensile strength. The rotor cores in interior permanent magnet motor...
H. Soyama, O. Takakuwa, A. Naito
BHR Group - 21st International Conference on Water Jetting: Looking to the Future, Learning from the Past   367-378   Dec 2012
A cavitating jet can be used for cutting and a material testing to evaluate cavitation erosion resistance of materials. In order to use the cavitating jet more efficiently, effect of nozzle shape should be investigated, as aggressivity of the jet ...
S. Kanou, O. Takakuwa, S. R. Mannava, D. Qian, V. K. Vasudevan, H. Soyama
Journal of Materials Processing Technology   212(10) 1998-2006   Oct 2012
In order to clarify the relationship between the depth of dimples and the plastically deformed region beneath the surface induced by shot peening and compare the characteristics of various peening methods in terms of single impact energy, the plas...
O. Takakuwa, M. Nishikawa, H. Soyama
Journal of Materials Processing Technology   212(8) 1716-1722   Aug 2012
In this paper we propose an experimental method for estimating the depth to which the surface of a material is modified after being treated by cavitation peening. The estimate is made on the basis of two theories: plate theory and beam theory, in ...
O. Takakuwa, H. Soyama
Surface and Coatings Technology   206(23) 4756-4762   Jul 2012
The objective of this paper is to optimize the pitch at which the nozzle of a cavitating jet is scanned during peening. The evaluations of an effect of the pitch on overlapping treatment are done, firstly theoretically, by estimating the aggressiv...
O. Takakuwa, H. Soyama
Surface and Coatings Technology   206(18) 3747-3750   May 2012
In order to demonstrate the effect that the compressive residual stress introduced by cavitation peening has on suppressing the invasion of the surface of steel by hydrogen, we examined the surface after hydrogen charging using a spherical indente...
O. Takakuwa, H. Soyama
International Journal of Hydrogen Energy   37(6) 5268-5276   Mar 2012
In this paper we demonstrate the suppression of hydrogen-assisted fatigue crack growth in type 316L austenitic stainless steel by cavitation peening employing a cavitating jet in air. Plate bending fatigue tests on pre-cracked samples were conduct...
O. Takakuwa, M. Nishikawa, H. Soyama
Surface and Coatings Technology   206(11-12) 2892-2898   Feb 2012
For this study we used finite element analysis to show how the residual stress affects the hydrogen concentration around a crack tip in a plastically deformable material after a fatigue process. Following a 9. cycle fatigue process, hydrogen diffu...
A. Naito, O. Takakuwa, H. Soyama
Materials Science and Technology   28(2) 234-238   Jan 2012
The present paper demonstrates the development of a peening technique using recirculating shot accelerated by a water jet that can be used as a risk free treatment in power and chemical plants. Although it is important to increase the reliability ...
Hitoshi Soyama, Kazuya Nagasaka, Osamu Takakuwa and Akima Naito
Journal of Power and Energy Systems   6(2) 63-75   2012
Satoshi Nishimura, Osamu Takakuwa and Hitoshi Soyama
Journal of Fluid Science and Technology   7(3) 405-420   2012
Crystal Plasticity Simulation on Fatigue Crack Propagation in Steel and Effect of Residual Stress by Cavitation Peening
Yoshiteru Aoyagi, Osamu Takakuwa, Hitoshi Soyama
Metal Finishing News   13(3) 58-60   2012
Osamu Takakuwa, Toshihito Ohmi, Masaaki Nishikawa, A. Toshimitsu Yokobori, Hitoshi Soyama
Strength, Fracture and Complexity   7(1) 79-85   Nov 2011
In the use of hydrogen energy, the hydrogen embrittlement should be investigated, and it is necessary to improve reliability and safety of machine components which are used in hydrogen environment. The hydrogen sensitivity of material depends on m...
O. Takakuwa, M. Nishikawa, H. Soyama
Materials Science and Technology   27(9) 1422-1426   Sep 2011
Cavitation peening (CP), which utilises the impact caused by cavitation bubbles collapsing, can improve the fatigue strength of metallic materials as well as the yield stress and tensile strength. The rotor cores in interior permanent magnet motor...
Hitoshi Soyama, T. Kikuchi, M. Nishikawa, O. Takakuwa
Surface and Coatings Technology   205(10) 3167-3174   Feb 2011
In order to eliminate stress corrosion cracking, a method of introduction of compressive residual stress using cavitation impacts was proposed, without use of shots. The cavitation impacts were successfully produced by a cavitating jet in air, wit...
Hitoshi Soyama and Osamu Takakuwa
Journal of Fluid Science and Technology   6(4) 510-521   2011
水噴流加速式循環型ショットピーニングによるステンレス鋼の水素脆化抑止
内藤 暁馬, 髙桑 脩, 祖山 均
噴流工学   28(2) 12-17   2011
Effect of Injection Pressure and Size of Nozzle Throat of a Cavitating Jet on Cavitation Peening
Hitoshi Soyama, Osamu Takakuwa and Akima Naito
Proceedings of the 11th International Conference on Shot peening   129-134   2011
Masaaki Nishikawa, Osamu Takakuwa, Hitoshi Soyama
Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A   76(770) 1367-1372   Jan 2010
The present study evaluated the yield stress distribution in the surface layer and the fatigue properties of a steel SUS316L modified by cavitation peening (CP). The yield stress was evaluated based on micro-indentation tests using a spherical ind...
キャビテーションピーニングによる圧縮応力付与
髙桑 脩, 西川 雅章, 祖山 均
砥粒加工学会誌   54 574-577   2010
Suppression of Fatigue Crack Propagation in Steel by Cavitation Peening
O. Takakuwa, M. Nishikawa and H. Soyama
Metal Finishing News   58-60   2010
Osamu Takakuwa, Masaaki Nishikawa, Hitoshi Soyama
Key Engineering Materials   452-453 641-644   2010
Cavitation normally causes severe damage in hydraulic machinery such as pumps and turbines by the impact produced by cavitation bubbles collapsing. Although cavitation is known as a factor of erosion, Soyama et al. succeeded in utilizing impacts o...
H. Soyama, N. Yamada, O. Takakuwa, Y. Sekine, M. Mikami
19th International Conference on Water Jetting   219-228   Dec 2008
Cavitation impacts can be utilized to improve material properties such as fatigue strength. In case of such application, cavitation was produced by a cavitating jet. In order to investigate mechanism of surface modification, tool alloy steel was t...

Books etc

 
水素利用技術集成Vol. 4
2014   ISBN:978-4-86469-082-9
(1) Advanced Experimental and Numerical Techniques for Cavitation Erosion Prediction
2014   ISBN:978-94-017-8538