論文

査読有り
2011年3月1日

In-situ scanning electron microscopy/electron backscattered diffraction observation of microstructural evolution during α → γ phase transformation in deformed Fe-Ni alloy

Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
  • Tatsuya Fukino
  • ,
  • Sadahiro Tsurekawa
  • ,
  • Yasuhiro Morizono

42
開始ページ
587
終了ページ
593
DOI
10.1007/s11661-010-0285-4

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. During heating, recrystallization in α phase and α → γ phase transformation independently occurred. The γ grains nucleated in unrecrystallized α grains were most probably incorporated into the grain interior of recrystallized α grains. They did not have any specific orientation relation (OR) with recrystallized α grains and grew in an isotropic manner. On the other hand, the intragranular γ grains nucleated in recrystallized α grains had a Kurdjumov-Sachs (K-S) OR with the α grains and grew in a considerably anisotropic manner. They preferentially grew along the common direction of surface traces of {110} α /{111} γ . Approximately half of grain boundary (GB) allotriomorphs had either the K-S OR or the Nishiyama-Wasserman (N-W) OR with the parent α grains. The γ allotriomorphs predominantly grew into the α grain having the special OR with themselves. The GB character distribution of γ phase at high temperatures was measured. The fraction of CSL boundaries was as high as 63 pct, particularly that of ?3 grain boundaries (GBs) was 54 pct. ? 2010 The Minerals, Metals & Materials Society and ASM International.

リンク情報
DOI
https://doi.org/10.1007/s11661-010-0285-4
URL
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=79951509061&origin=inward
ID情報
  • DOI : 10.1007/s11661-010-0285-4
  • ISSN : 1073-5623

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