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タイトル: Significant contribution of stacking faults to the strain hardening behavior of Cu-15%Al alloy with different grain sizes.
著者: Tian, Y. Z.
Zhao, L. J.
Chen, S.
Shibata, A.
Zhang, Z. F.
Tsuji, N.
著者名の別形: 田, 艶中
柴田, 曉伸
辻, 伸泰
発行日: 19-Nov-2015
出版者: Nature Publishing Group
誌名: Scientific reports
巻: 5
論文番号: 16707
抄録: It is commonly accepted that twinning can induce an increase of strain-hardening rate during the tensile process of face-centered cubic (FCC) metals and alloys with low stacking fault energy (SFE). In this study, we explored the grain size effect on the strain-hardening behavior of a Cu-15 at.%Al alloy with low SFE. Instead of twinning, we detected a significant contribution of stacking faults (SFs) irrespective of the grain size even in the initial stage of tensile process. In contrast, twinning was more sensitive to the grain size, and the onset of deformation twins might be postponed to a higher strain with increasing the grain size. In the Cu-15 at.%Al alloy with a mean grain size of 47 μm, there was a stage where the strain-hardening rate increases with strain, and this was mainly induced by the SFs instead of twinning. Thus in parallel with the TWIP effect, we proposed that SFs also contribute significantly to the plasticity of FCC alloys with low SFE.
記述: 構造材料の変形挙動に新たな視点 -強さとねばさを兼備した材料開発へ-. 京都大学プレスリリース. 2015-11-20.
著作権等: This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
URI: http://hdl.handle.net/2433/201884
DOI(出版社版): 10.1038/srep16707
PubMed ID: 26582568
関連リンク: http://www.kyoto-u.ac.jp/ja/research/research_results/2015/151119_2.html
出現コレクション:学術雑誌掲載論文等

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