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Title: Twinning-like lattice reorientation without a crystallographic twinning plane

Abstract

Twinning on the f g 1012 plane is a common mode of plastic deformation for hexagonal-close-packed metals. Here we report, by monitoring the deformation of submicron-sized single-crystal magnesium compressed normal to its prismatic plane with transmission electron microscopy, the reorientation of the parent lattice to a ‘twin’ lattice, producing an orientational relationship akin to that of the conventional f g 1012 twinning, but without a crystallographic mirror plane, and giving plastic strain that is not simple shear. Aberration corrected transmission electron microscopy observations reveal that the boundary between the parent lattice and the ‘twin’ lattice is composed predominantly of semi-coherent basal/ prismatic interfaces instead of the f g 1012 twinning plane. The migration of this boundary is dominated by the movement of these interfaces undergoing basal/prismatic transformation via local rearrangements of atoms. This newly discovered deformation mode by boundary motion mimics conventional deformation twinning but is distinct from the latter and, as such, broadens the known mechanisms of plasticity.

Authors:
 [1];  [2];  [3];  [4];  [5];  [1];  [6];  [4];  [1];  [1]
  1. Xi'an Jiaotong Univ., Shaanxi (China). State Key Lab. for Mechanical Behavior of Materials. Hysitron Applied Research Center in China (HARCC). Center for Advancing Materials Performance from the Nanoscale (CAMP-Nano)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Mississippi State Univ., Mississippi State, MS (United States). Center for Advanced Vehicular Systems
  4. Xi'an Jiaotong Univ., Shaanxi (China). International Center of Dielectric Research
  5. Chongqing Univ. (China). School of Materials Science and Engineering
  6. Xi'an Jiaotong Univ., Shaanxi (China). State Key Lab. for Mechanical Behavior of Materials. Hysitron Applied Research Center in China (HARCC). Center for Advancing Materials Performance from the Nanoscale (CAMP-Nano); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Materials Science and Engineering. Dept. of Nuclear Science and Engineering
Publication Date:
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
OSTI Identifier:
1623934
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 5; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; Science & Technology - Other Topics

Citation Formats

Liu, Bo-Yu, Wang, Jian, Li, Bin, Lu, Lu, Zhang, Xi-Yan, Shan, Zhi-Wei, Li, Ju, Jia, Chun-Lin, Sun, Jun, and Ma, Evan. Twinning-like lattice reorientation without a crystallographic twinning plane. United States: N. p., 2014. Web. https://doi.org/10.1038/ncomms4297.
Liu, Bo-Yu, Wang, Jian, Li, Bin, Lu, Lu, Zhang, Xi-Yan, Shan, Zhi-Wei, Li, Ju, Jia, Chun-Lin, Sun, Jun, & Ma, Evan. Twinning-like lattice reorientation without a crystallographic twinning plane. United States. https://doi.org/10.1038/ncomms4297
Liu, Bo-Yu, Wang, Jian, Li, Bin, Lu, Lu, Zhang, Xi-Yan, Shan, Zhi-Wei, Li, Ju, Jia, Chun-Lin, Sun, Jun, and Ma, Evan. Thu . "Twinning-like lattice reorientation without a crystallographic twinning plane". United States. https://doi.org/10.1038/ncomms4297. https://www.osti.gov/servlets/purl/1623934.
@article{osti_1623934,
title = {Twinning-like lattice reorientation without a crystallographic twinning plane},
author = {Liu, Bo-Yu and Wang, Jian and Li, Bin and Lu, Lu and Zhang, Xi-Yan and Shan, Zhi-Wei and Li, Ju and Jia, Chun-Lin and Sun, Jun and Ma, Evan},
abstractNote = {Twinning on the f g 1012 plane is a common mode of plastic deformation for hexagonal-close-packed metals. Here we report, by monitoring the deformation of submicron-sized single-crystal magnesium compressed normal to its prismatic plane with transmission electron microscopy, the reorientation of the parent lattice to a ‘twin’ lattice, producing an orientational relationship akin to that of the conventional f g 1012 twinning, but without a crystallographic mirror plane, and giving plastic strain that is not simple shear. Aberration corrected transmission electron microscopy observations reveal that the boundary between the parent lattice and the ‘twin’ lattice is composed predominantly of semi-coherent basal/ prismatic interfaces instead of the f g 1012 twinning plane. The migration of this boundary is dominated by the movement of these interfaces undergoing basal/prismatic transformation via local rearrangements of atoms. This newly discovered deformation mode by boundary motion mimics conventional deformation twinning but is distinct from the latter and, as such, broadens the known mechanisms of plasticity.},
doi = {10.1038/ncomms4297},
journal = {Nature Communications},
number = 1,
volume = 5,
place = {United States},
year = {2014},
month = {2}
}

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