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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Nucleation and growth analysis of {10(1)over-bar2} extension twins in AZ31 magnesium alloy during in-situ tension
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Nucleation and growth analysis of {10(1)over-bar2} extension twins in AZ31 magnesium alloy during in-situ tension

机译：在原位张力期间AZ31镁合金中的{10（1）次过度条2}延伸双胞胎的成核和生长分析

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The in-situ tensile test combined with electron back-scattering diffraction (EBSD) method is carried out to observe the nucleation and growth of {10 (1) over bar2} extension twins in AZ31 magnesium alloy. The dynamic process of twinning can be clearly revealed by tracing the same position in the process of increasing of cumulative strain. According to the statistical analysis results, which are based on a large number of data set, Schmid Factor (SF) plays an important role in the nucleation and growth of twins. The twin variants with high SF are easier to activate and have a relatively high growth rate. However, not all the twins follow the SF rule. About 60% of the nucleated twins during the in-situ tensile test satisfy the SF rule, while for the twin growth this number is decreased to 50%. In addition, the strain accommodation factors between the deformation modes in neighboring grains and extension twins are analyzed. The shear accommodation for extension twins nucleation and growth in neighboring grains plays an important role. The shear accommodation imposed by pyramidal slip in the neighboring grains is beneficial to the twin nucleation, however, is unfavorable for the twin growing. (C) 2019 Elsevier B.V. All rights reserved.
机译：与电子背散射衍射（EBSD）方法结合的原位拉伸试验进行，以观察AZ31镁合金中的{10（1）°突出双胞胎的含量和生长。通过在增加累积菌株的过程中追踪相同的位置，可以清楚地揭示孪生的动态过程。根据基于大量数据集的统计分析结果，施密因子（SF）在双胞胎的成核和生长中起重要作用。具有高SF的双变体更容易激活并且具有相对高的增长率。但是，并非所有的双胞胎都遵循SF规则。在原位拉伸试验期间约有60％的核肉双胞胎满足SF规则，而对于双胞胎增长，该数量降低至50％。此外，分析了相邻晶粒和延伸双胞胎中变形模式之间的应变容纳因子。用于延伸双胞胎的剪切住宿，邻近谷物的成核和生长起着重要作用。在邻近晶粒中通过金字塔滑动施加的剪切容纳有利于双胞胎成核，但是对于双胞胎生长而言是不利的。 （c）2019 Elsevier B.v.保留所有权利。

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