Abstract

The surface twins were characterized for a strongly basal-textured Mg sheet that was deformed under tension in the extrusion direction (hard-orientation). All the twins observed were tension twins. A significant number of them exhibited negative Schmid factor (m) and Luster–Morris parameter (m′) values. Both a normalized m and grain-boundary misorientation were correlated to the twinning behavior, which was shown to be more dependent on the local conditions than the globally applied stress, thereby limiting the m and m′ correlations.

Graphic Abstract

中文翻译：

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室温下硬取向载荷下挤压镁片材的异常拉伸孪生活性

摘要

表面孪晶的特征是具有强烈基部结构的Mg片材，该片材在拉伸方向（拉伸方向）的拉伸作用下变形。观察到的所有双胞胎都是张力双胞胎。他们中的许多人都表现出负的Schmid因子（m）和Luster-Morris参数（m'）值。归一化的m取向和晶界取向错误都与孪生行为相关，这表明孪晶行为比局部施加的应力更依赖于局部条件，从而限制了m和m'的相关性。

图形摘要