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Title: Characterizing the boundary lateral to the shear direction of deformation twins in magnesium

Journal Article · · Nature Communications
DOI:https://doi.org/10.1038/ncomms11577· OSTI ID:1259961
 [1];  [2]; ORCiD logo [1];  [3]; ORCiD logo [3];  [1];  [4];  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Materials Science and Technology Division
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Materials Physics and Applications Division
  3. Univ. of Nebraska-Lincoln, Lincoln, NE (United States)
  4. Univ. of Nevada, Reno, NV (United States)

The three-dimensional nature of twins, especially the atomic structures and motion mechanisms of the boundary lateral to the shear direction of the twin, has never been characterized at the atomic level, because such boundary is, in principle, crystallographically unobservable. We thus refer to it here as the dark side of the twin. Here, using high-resolution transmission electron microscopy and atomistic simulations, we characterize the dark side of {1012} deformation twins in magnesium. It is found that the dark side is serrated and comprised of {1012} coherent twin boundaries and semi-coherent twist prismatic–prismatic {2110} boundaries that control twin growth. The conclusions we find in this work apply to the same twin mode in other hexagonal close-packed materials, and the conceptual ideas discussed here should hold for all twin modes in crystalline materials.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1259961
Report Number(s):
LA-UR-16-22025
Journal Information:
Nature Communications, Vol. 7; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 64 works
Citation information provided by
Web of Science

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Cited By (4)

Direct observation and impact of co-segregated atoms in magnesium having multiple alloying elements journal July 2019
Three-dimensional character of the deformation twin in magnesium journal July 2019
The surface nucleation of tension twin via pure-shuffle mechanism: The energy landscape sampling and dynamic simulations journal May 2018
Effect of Micro-Steps on Twinning and Interfacial Segregation in Mg-Ag Alloy journal April 2019

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