Unstable twin in body-centered cubic tungsten nanocrystals

Xiang Wang; Jiangwei Wang; Yang He; Chongmin Wang; Li Zhong; Scott X. Mao

doi:10.1038/s41467-020-16349-8

journal article Open Access May 19, 2020

Unstable twin in body-centered cubic tungsten nanocrystals

Xiang Wang

Nature Communications Vol. 11 No. 1 · Springer Science and Business Media LLC

View at Publisher Save 10.1038/s41467-020-16349-8

Abstract

AbstractTwinning 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.

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Details

Published: May 19, 2020
Vol/Issue: 11(1)
License: View

Authors

National Key Laboratory of Agricultural Microbiology, Center for Proteomics Research, College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China

Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States

Cite This Article

Xiang Wang, Jiangwei Wang, Yang He, et al. (2020). Unstable twin in body-centered cubic tungsten nanocrystals. Nature Communications, 11(1). https://doi.org/10.1038/s41467-020-16349-8

Unstable twin in body-centered cubic tungsten nanocrystals

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