Impact Factor:

18.9

DOI number:

10.1038/s41467-020-16349-8

Affiliation of Author(s):

Department of Mechanical Engineering and Materials Science, University of Pittsburgh

Journal:

Nature communications

Place of Publication:

UK

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 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.

Co-author:

Jiangwei Wang,Yang He

First Author:

Xiang Wang

Indexed by:

Journal paper

Correspondence Author:

Chongmin Wang,Li Zhong,Scott X Mao

Discipline:

Engineering

Document Type:

J

Volume:

11

Issue:

1

Page Number:

2497

Translation or Not:

no

Date of Publication:

2020-05-19

Included Journals:

SCI

Links to published journals:

https://doi.org/10.1038/s41467-020-16349-8