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j.msea.2013.10.083.pdf | 3.04 MB | Adobe PDF | 見る/開く |
タイトル: | Effect of pre-strain on work-hardening behavior of magnesium alloy sheets upon cyclic loading |
著者: | Hama, Takayuki Nagao, Hirotaka Kobuki, Akihiro Kuchinomachi, Yota Takuda, Hirohiko |
著者名の別形: | 濵, 孝之 宅田, 裕彦 |
キーワード: | Magnesium alloy sheet In-plane cyclic loading Pre-strain Twinning Work-hardening |
発行日: | 3-Jan-2014 |
出版者: | Elsevier B.V. |
誌名: | Materials Science and Engineering A |
巻: | 591 |
開始ページ: | 66 |
終了ページ: | 77 |
抄録: | This paper reports the effect of pre-strain on the work-hardening behavior of rolled AZ31 magnesium alloy sheets during in-plane cyclic loading. The work-hardening behavior of the alloy remained almost unchanged when tensile strain was applied before cyclic loading. However, the work-hardening behavior was significantly affected when a compressive strain was applied. First, the resulting stress–strain curve was not sigmoidal upon tension in some cases, depending on the magnitudes of the applied compressive pre-strain owing to the inversion of the loading direction from tension to compression before the second increase in the work-hardening rate. In other words, a sigmoidal stress–strain curve certainly arose upon tension when compressive pre-strain was applied and the loading direction was not inverted from tension to compression. It was found that the strain at the beginning of the second increase had a high correlation with the volume fraction of twins. Second, the change in the rate of work-hardening at the beginning of tension became sharp as compressive pre-strain increased, probably owing to the effect of activation of detwinning on the stress–strain curve, which became increasingly significant as the compressive pre-strain increased the volume fraction of twins. |
著作権等: | © 2014. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/. The full-text file will be made open to the public on 3 January 2016 in accordance with publisher's 'Terms and Conditions for Self-Archiving' This is not the published version. Please cite only the published version. 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。 |
URI: | http://hdl.handle.net/2433/237629 |
DOI(出版社版): | 10.1016/j.msea.2013.10.083 |
出現コレクション: | 学術雑誌掲載論文等 |
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