Strain hardening behaviors and strain rate sensitivity of gradient-grained Fe under compression over a wide range of strain rates
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- 作者：Fuping Yuan ; fpyuan@lnm.imech.ac.cn" class="auth_mail" title="E-mail the corresponding author ; Ping Chen ; Yanpeng Feng ; Ping Jiang ; Xiaolei Wu
- 关键词：Dynamic loading ; Strain hardening behaviors ; Strain rate sensitivity ; Gradient-grained structure ; Coarse-grained structure
- 刊名：Mechanics of Materials
- 出版年：2016
- 出版时间：April 2016
- 年：2016
- 卷：95
- 期：Complete
- 页码：71-82
- 全文大小：3786 K
文摘
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Gradient-grained Fe was synthesized by SMGT and its microstructures were examined.
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Gradient-grained Fe shows apparent strain hardening at strain rates up to 104 s−1.
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The extra hardening is due to the back stress hardening in the gradient-grained Fe.
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Dynamic SRS of gradient-grained Fe is larger than that of coarse-grained Fe.
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Enhanced SRS is due to the increased dislocation density by gradient structure.