Serration Flow Behavior with Abnormal Strain Rate Sensitivity of Fine-Grained Mg-0.8 Wt Pct Ca Alloy

被引：0
|
作者：
Qiuming Peng
Hui Fu
Wenlong Xiao
机构：
[1] Yanshan University,State Key Laboratory of Metastable Materials Science and Technology
[2] Beihang University,School of Materials Science and Engineering
来源：
Metallurgical and Materials Transactions A | 2013年 / 44卷
关键词：
Strain Rate Sensitivity; Solute Atom; Solid Solution Strengthen; Dislocation Interaction; Solid Solution Softening;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Serration flow is first observed in a fine-grained Mg-0.8 wt pct Ca alloy throughout the deformation history. Strain rate sensitivity (SRS) is sensitive with the deformation temperatures. A positive SRS in combination with a type of downward serration is found at low temperatures, which is mostly attributed to the strong dislocation–dislocation interaction. However, at high temperatures, another upward serration is observed and the SRS is changed to negative as a result of the solute pinning dislocation.
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页码：4469 / 4474
页数：5
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