A new double twinning mode in a cold-rolled Zr alloy
A new double twinning mode in a cold-rolled Zr alloy
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DOI：
10.1080/09500839.2019.1612107
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发表时间：
2019-01-02
影响因子：
1.2
通讯作者：
Song, Min
中科院分区：
文献类型：
--
作者：
An, Xinglong;Ni, Song;Song, Min
用透射电子显微镜观察到了以38°孪晶/母体取向错位为特征的冷轧ZR70Ti30合金中的双孪晶。孪晶中存在P-Py、P-B和B-Py界面，并在原子尺度上进行了鉴定。沿孪晶界的大量台阶(P-Py和P-B界面)的存在导致了双孪晶界在宏观尺度上的曲率和偏离孪晶面。结果表明，多道次轧制过程中温度的升高促进了初生孪晶的形成。
A new double twinning mode characterised by a 38 degrees twin/matrix misorientation was observed in a cold-rolled Zr70Ti30 alloy using transmission electron microscope (TEM). The P-Py, P-B and B-Py interfaces coexist in double twins and were identified at the atomic scale. The presence of a large number of steps (P-Py and P-B interfaces) along the twin boundaries led to the curvature and deviation of the double twin boundaries from the twinning planes in macroscale. It is proposed that the temperature increase during multi-pass rolling process activated the twinning in primary twins.