Elasticity-based model of the variant selection observed in the β to α phase transformation of a Zircalloy-4 sample
Elasticity-based model of the variant selection observed in the β to α phase transformation of a Zircalloy-4 sample
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DOI：
10.1016/s1359-6454(03)00318-5
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发表时间：
2003-09
期刊：
影响因子：
9.4
通讯作者：
M. Humbert;N. Gey
中科院分区：
文献类型：
--
作者：
M. Humbert;N. Gey
本文研究了Zr-4合金经过α→β→α相变循环后的β→α织构遗传。通过电子背散射衍射确定的晶体取向图确定了最终的遗传α织构，而高温β相的织构通过分析α变体的取向和取向差的方法重建。通过比较由无变体选择的母β织构计算得到的α织构与实验得到的尖锐α织构，发现两者之间存在差异，这是由于在冷却时相变过程中出现了强变体选择机制。基于母体β相弹性各向异性的变体选择机制模型导致模拟的继承α织构具有实验织构的主要特征。
The β→α texture inheritance of a Zircalloy-4 sample has been investigated after an α→β→α transformation cycle. The final inherited α texture has been determined from a crystal orientation map determined by electron back-scattering diffraction, whereas the texture of the high temperature β phase has been reconstructed by a method analysing the orientations and misorientations of α variants. The comparison of the α texture calculated from the parent β texture without variant selection with the experimental sharp α texture shows differences due to a strong variant selection mechanism occurring during the phase transformation at cooling. A model of a variant selection mechanism based on the elastic anisotropy of the parent β phase leads to a simulated inherited α texture with the main characteristics of the experimental texture.