Unstable twin in body-centered cubic tungsten nanocrystals
Abstract
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 discovered 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 was 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.
- Authors:
-
[3];
[1];
[1]
- Univ. of Pittsburgh, PA (United States)
- Univ. of Pittsburgh, PA (United States); Zhejiang Univ., Hangzhou (China). Center of Electron Microscopy and State Key Lab. of Silicon Materials
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
- Publication Date:
- Research Org.:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Biological and Environmental Research (BER); National Science Foundation (NSF)
- OSTI Identifier:
- 1638497
- Report Number(s):
- PNNL-SA-152500
Journal ID: ISSN 2041-1723
- Grant/Contract Number:
- AC05-76RL01830; CMMI 1760916
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nature Communications
- Additional Journal Information:
- Journal Volume: 11; Journal Issue: 1; Journal ID: ISSN 2041-1723
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Metals and alloys; structural properties
Citation Formats
Wang, Xiang, Wang, Jiangwei, He, Yang, Wang, Chongmin, Zhong, Li, and Mao, Scott X. Unstable twin in body-centered cubic tungsten nanocrystals. United States: N. p., 2020.
Web. doi:10.1038/s41467-020-16349-8.
Wang, Xiang, Wang, Jiangwei, He, Yang, Wang, Chongmin, Zhong, Li, & Mao, Scott X. Unstable twin in body-centered cubic tungsten nanocrystals. United States. https://doi.org/10.1038/s41467-020-16349-8
Wang, Xiang, Wang, Jiangwei, He, Yang, Wang, Chongmin, Zhong, Li, and Mao, Scott X. Tue .
"Unstable twin in body-centered cubic tungsten nanocrystals". United States. https://doi.org/10.1038/s41467-020-16349-8. https://www.osti.gov/servlets/purl/1638497.
@article{osti_1638497,
title = {Unstable twin in body-centered cubic tungsten nanocrystals},
author = {Wang, Xiang and Wang, Jiangwei and He, Yang and Wang, Chongmin and Zhong, Li and Mao, Scott X.},
abstractNote = {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 discovered 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 was 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.},
doi = {10.1038/s41467-020-16349-8},
journal = {Nature Communications},
number = 1,
volume = 11,
place = {United States},
year = {Tue May 19 00:00:00 EDT 2020},
month = {Tue May 19 00:00:00 EDT 2020}
}
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