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isijinternational.ISIJINT-2017-011.pdf | 8.41 MB | Adobe PDF | 見る/開く |
タイトル: | Crystal plasticity finite-element simulation on development of dislocation structures in BCC ferritic single crystals |
著者: | Hama, Takayuki https://orcid.org/0000-0002-6464-9947 (unconfirmed) Kojima, Keisuke Kubo, Masahiro Fujimoto, Hitoshi https://orcid.org/0000-0001-6772-1097 (unconfirmed) Takuda, Hirohiko |
著者名の別形: | 濵, 孝之 久保, 雅寛 藤本, 仁 宅田, 裕彦 |
キーワード: | ferritic single crystal crystal plasticity finite-element method dislocation structure work-hardening behavior body-centered cubic metal |
発行日: | May-2017 |
出版者: | Iron and Steel Institute of Japan |
誌名: | ISIJ International |
巻: | 57 |
号: | 5 |
開始ページ: | 866 |
終了ページ: | 874 |
抄録: | The role of {112} slip activity on the deformation of bcc ferritic single crystals with different crystallographic orientations was studied numerically using a crystal plasticity finite-element method. Peeters model [Peeters et al., Acta Mater., 49 (2001), 1607] was utilized to predict development of dislocation structures as well as work-hardening behavior. To examine the effect of the {112} slip activity in detail, the simulation was carried out using original Peeters model in which development of cell-block boundaries (CBBs) along the {112} planes was not taken into account, Peeters model in which development of CBBs along the {112} planes was taken into account (extended-1 model), and Peeters model in which {112} slip activity was not taken into consideration (extended-2 model). The predicted stress-strain curves were in qualitatively good agreement with the experimental results for all cases when the original and extended-1 models were used, whereas two-stage work hardening observed for the crystal with {100} <011> was not predicted when the extended-2 model was used. Concerning development of CBBs, the extended-1 and extended-2 models gave better prediction as compared to the original model. The abovementioned results suggested that the extended-1 model gave the most appropriate predictions among the models in terms of work-hardening behavior and development of CBBs, showing that it was more reasonable to take into account both {110} and {112} slip systems and development of CBBs along not only the {110} planes but also the {112} planes. |
著作権等: | © 2017 by The Iron and Steel Institute of Japan Publisher permitted to deposit this paper on this repository. |
URI: | http://hdl.handle.net/2433/235949 |
DOI(出版社版): | 10.2355/isijinternational.ISIJINT-2017-011 |
出現コレクション: | 学術雑誌掲載論文等 |
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