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タイトル: | Martensite phase stress and the strengthening mechanism in TRIP steel by neutron diffraction |
著者: | Harjo, Stefanus Tsuchida, Noriyuki Abe, Jun Gong, Wu |
著者名の別形: | ハルヨ, ステファヌス 土田, 紀之 阿部, 淳 ゴン, ウー |
キーワード: | Characterization and analytical techniques Mechanical properties |
発行日: | 9-Nov-2017 |
出版者: | Springer Nature |
誌名: | Scientific Reports |
巻: | 7 |
論文番号: | 15149 |
抄録: | Two TRIP-aided multiphase steels with different carbon contents (0.2 and 0.4 mass%) were analyzed in situ during tensile deformation by time-of-flight neutron diffraction to clarify the deformation induced martensitic transformation behavior and its role on the strengthening mechanism. The difference in the carbon content affected mainly the difference in the phase fractions before deformation, where the higher carbon content increased the phase fraction of retained austenite (γ). However, the changes in the relative fraction of martensitic transformation with respect to the applied strain were found to be similar in both steels since the carbon concentrations in γ were similar regardless of different carbon contents. The phase stress of martensite was found much larger than that of γ or bainitic ferrite since the martensite was generated at the beginning of plastic deformation. Stress contributions to the flow stress were evaluated by multiplying the phase stresses and their phase fractions. The stress contribution from martensite was observed increasing during plastic deformation while that from bainitic ferrite hardly changing and that from γ decreasing. |
記述: | 自動車用鋼板の開発に新しい道筋 --先端鉄鋼「TRIP鋼」の引張力に対するふるまいを実験的に解明--. 京都大学プレスリリース. 2018-02-27. |
著作権等: | © Te Author(s) 2017. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
URI: | http://hdl.handle.net/2433/229496 |
DOI(出版社版): | 10.1038/s41598-017-15252-5 |
PubMed ID: | 29123143 |
関連リンク: | http://www.kyoto-u.ac.jp/ja/research/research_results/2017/171109_1.html |
出現コレクション: | 学術雑誌掲載論文等 |
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