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影响因子：18.9

DOI码：10.1038/s41467-020-16349-8

所属单位：Department of Mechanical Engineering and Materials Science, University of Pittsburgh

发表刊物：Nature communications

刊物所在地：UK

摘要：Twinning is commonly activated in plastic deformation of low stacking-fault face-centered cubic (Fcc) metals but rarely found in body-centered cubic (Bcc) metals under room temperature and slow strain rates. Here, by conducting in situ transmission electron microscopy (TEM) at atomic scale, we discover that, in stark contrast to those in most Fcc metals, a majority of deformation twins in Bcc metals are unstable and undergo spontaneously detwinning upon unloading. Such unexpected instability of Bcc twins is found to be closely related to the prevalence of the inclined twin boundaries—a peculiar structure where twin boundaries are not parallel to the twinning plane, and the degree of instability is in direct proportion to the fraction of the inclined twin boundary. This work provides significant insights into the structure and stability of deformation twins in Bcc metals.

合写作者：Jiangwei Wang,Yang He

第一作者：Xiang Wang

论文类型：期刊论文

通讯作者：Chongmin Wang,Li Zhong,Scott X Mao

学科门类：工学

文献类型：J

卷号：11

期号：1

页面范围：2497

是否译文：否

发表时间：2020-05-19

收录刊物：SCI

发布期刊链接：https://doi.org/10.1038/s41467-020-16349-8