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タイトル: Effect of twinning and detwinning on inelastic behavior during unloading in a magnesium alloy sheet
著者: Hama, Takayuki  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0002-6464-9947 (unconfirmed)
Kitamura, Naoya
Takuda, Hirohiko  KAKEN_id
著者名の別形: 浜, 孝之
キーワード: Magnesium alloy sheet
Crystal plasticity
Finite element method
Unloading
Twinning
Texture
発行日: Oct-2013
出版者: Elsevier B.V.
誌名: Materials Science and Engineering: A
巻: 583
開始ページ: 232
終了ページ: 241
抄録: We investigate the nonlinear response arising during unloading under in-plane uniaxial compression of a rolled magnesium alloy sheet using a crystal plasticity finite-element method, focusing on the effects of twinning and detwinning, and discuss the mechanism that causes the nonlinear response to be more pronounced under uniaxial compression than under uniaxial tension. In the simulation, we employed a twinning and detwinning model recently proposed by the authors. From numerical experiments, we confirmed that, as already noted in previous studies, detwinning activity plays an important role in the nonlinear response during unloading. However, we also found that the basal slip could become very active during unloading because of the dispersion of crystallographic orientations caused by twinning activity during loading, which is another factor in the pronounced nonlinear response during unloading under uniaxial compression. We conclude that the nonlinear response during unloading is more pronounced under uniaxial compression than under uniaxial tension because of these two factors--i.e., the detwinning activity and the pronounced basal slip activity--which are not present under uniaxial tension.
著作権等: © 2013 Elsevier B.V.
この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
This is not the published version. Please cite only the published version.
URI: http://hdl.handle.net/2433/178736
DOI(出版社版): 10.1016/j.msea.2013.06.070
出現コレクション:学術雑誌掲載論文等

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