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

Abstract

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.

Authors:
 [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)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1259961
Report Number(s):
LA-UR-16-22025
Journal ID: ISSN 2041-1723
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 7; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Liu, Y., Li, N., Shao, S., Gong, M., Wang, J., McCabe, R. J., Jiang, Y., and Tomé, C. N. Characterizing the boundary lateral to the shear direction of deformation twins in magnesium. United States: N. p., 2016. Web. https://doi.org/10.1038/ncomms11577.
Liu, Y., Li, N., Shao, S., Gong, M., Wang, J., McCabe, R. J., Jiang, Y., & Tomé, C. N. Characterizing the boundary lateral to the shear direction of deformation twins in magnesium. United States. https://doi.org/10.1038/ncomms11577
Liu, Y., Li, N., Shao, S., Gong, M., Wang, J., McCabe, R. J., Jiang, Y., and Tomé, C. N. Wed . "Characterizing the boundary lateral to the shear direction of deformation twins in magnesium". United States. https://doi.org/10.1038/ncomms11577. https://www.osti.gov/servlets/purl/1259961.
@article{osti_1259961,
title = {Characterizing the boundary lateral to the shear direction of deformation twins in magnesium},
author = {Liu, Y. and Li, N. and Shao, S. and Gong, M. and Wang, J. and McCabe, R. J. and Jiang, Y. and Tomé, C. N.},
abstractNote = {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 {101⁻2} deformation twins in magnesium. It is found that the dark side is serrated and comprised of {101⁻2} coherent twin boundaries and semi-coherent twist prismatic–prismatic {211⁻0} 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.},
doi = {10.1038/ncomms11577},
journal = {Nature Communications},
number = ,
volume = 7,
place = {United States},
year = {2016},
month = {6}
}

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    Works referencing / citing this record:

    Three-dimensional character of the deformation twin in magnesium
    journal, July 2019


    Direct observation and impact of co-segregated atoms in magnesium having multiple alloying elements
    journal, July 2019


    The surface nucleation of tension twin via pure-shuffle mechanism: The energy landscape sampling and dynamic simulations
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    Effect of Micro-Steps on Twinning and Interfacial Segregation in Mg-Ag Alloy
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