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Title: Three-dimensional character of the deformation twin in magnesium

Abstract

Deformation twins are three-dimensional domains, traditionally viewed as ellipsoids because of their two-dimensional lenticular sections. In this work, we performed statistical analysis of twin shapes viewing along three orthogonal directions: the ‘dark side’ (DS) view along the twin shear direction (η1), the twinning plane normal (TPN) view (k1) and the ‘bright side’ (BS) view along the direction λ(=k1 × η1). Our electron back-scatter diffraction results show that twins in the DS and BS views normally exhibit a lenticular shape, whereas they show an irregular shape in the TPN view. Moreover, the findings in the TPN view revealed that twins grow faster along λ the lateral direction than along η1 the forward propagation direction at the initial stages of twin growth. These twin sections are irregular, indicating that growth is locally controlled and the overall shape is not perfectly ellipsoidal. We explain these findings using atomistic models, and ascribe them to differences in the mobility of the edge and screw components of the twinning dislocations.

Authors:
ORCiD logo [1];  [2];  [3]; ORCiD logo [4];  [5];  [4]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Shanghai Jiao Tong Univ. (China)
  2. Shanghai Jiao Tong Univ. (China)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Univ. of Nebraska, Lincoln, NE (United States)
  4. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  5. Univ. of Nebraska, Lincoln, NE (United States)
Publication Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC). Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1558214
Report Number(s):
LA-UR-18-31163
Journal ID: ISSN 2041-1723
Grant/Contract Number:  
89233218CNA000001
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 10; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Liu, Y., Tang, P.Z., Gong, M.Y., Mccabe, R.J., Wang, J., and Tome, C.N. Three-dimensional character of the deformation twin in magnesium. United States: N. p., 2019. Web. doi:10.1038/s41467-019-10573-7.
Liu, Y., Tang, P.Z., Gong, M.Y., Mccabe, R.J., Wang, J., & Tome, C.N. Three-dimensional character of the deformation twin in magnesium. United States. https://doi.org/10.1038/s41467-019-10573-7
Liu, Y., Tang, P.Z., Gong, M.Y., Mccabe, R.J., Wang, J., and Tome, C.N. Thu . "Three-dimensional character of the deformation twin in magnesium". United States. https://doi.org/10.1038/s41467-019-10573-7. https://www.osti.gov/servlets/purl/1558214.
@article{osti_1558214,
title = {Three-dimensional character of the deformation twin in magnesium},
author = {Liu, Y. and Tang, P.Z. and Gong, M.Y. and Mccabe, R.J. and Wang, J. and Tome, C.N.},
abstractNote = {Deformation twins are three-dimensional domains, traditionally viewed as ellipsoids because of their two-dimensional lenticular sections. In this work, we performed statistical analysis of twin shapes viewing along three orthogonal directions: the ‘dark side’ (DS) view along the twin shear direction (η1), the twinning plane normal (TPN) view (k1) and the ‘bright side’ (BS) view along the direction λ(=k1 × η1). Our electron back-scatter diffraction results show that twins in the DS and BS views normally exhibit a lenticular shape, whereas they show an irregular shape in the TPN view. Moreover, the findings in the TPN view revealed that twins grow faster along λ the lateral direction than along η1 the forward propagation direction at the initial stages of twin growth. These twin sections are irregular, indicating that growth is locally controlled and the overall shape is not perfectly ellipsoidal. We explain these findings using atomistic models, and ascribe them to differences in the mobility of the edge and screw components of the twinning dislocations.},
doi = {10.1038/s41467-019-10573-7},
journal = {Nature Communications},
number = 1,
volume = 10,
place = {United States},
year = {Thu Jul 25 00:00:00 EDT 2019},
month = {Thu Jul 25 00:00:00 EDT 2019}
}

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Cited by: 33 works
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The roles of grain boundary dislocations and disclinations in the nucleation of {102} twinning
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Twin–twin interactions in magnesium
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A new mechanism for twin growth in Mg alloys
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First-principles study of energy and atomic solubility of twinning-associated boundaries in hexagonal metals
journal, February 2015


Effect of local stress fields on twin characteristics in HCP metals
journal, September 2016


Hardening evolution of AZ31B Mg sheet
journal, January 2007


Modeling the effect of twinning and detwinning during strain-path changes of magnesium alloy AZ31
journal, May 2009

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  • International Journal of Plasticity, Vol. 25, Issue 5
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A crystal plasticity model for hexagonal close packed (HCP) crystals including twinning and de-twinning mechanisms
journal, October 2013


Effect of realistic 3D microstructure in crystal plasticity finite element analysis of polycrystalline Ti-5Al-2.5Sn
journal, June 2015


Dislocation transmutation by tension twinning in magnesium alloy AZ31
journal, June 2016


Twinning and the ductility of magnesium alloys
journal, August 2007


Disconnections and other defects associated with twin interfaces
journal, October 2016


The origins of high hardening and low ductility in magnesium
journal, September 2015


Characterizing the boundary lateral to the shear direction of deformation twins in magnesium
journal, June 2016


Twinning-like lattice reorientation without a crystallographic twinning plane
journal, February 2014

  • Liu, Bo-Yu; Wang, Jian; Li, Bin
  • Nature Communications, Vol. 5, Issue 1
  • DOI: 10.1038/ncomms4297

Structural characterization of {101¯2} twin boundaries in cobalt
journal, July 2013

  • Tu, Jian; Zhang, Xiyan; Wang, Jian
  • Applied Physics Letters, Vol. 103, Issue 5
  • DOI: 10.1063/1.4817180

Pure-Shuffle Nucleation of Deformation Twins in Hexagonal-Close-Packed Metals
journal, September 2013


Interface structures and twinning mechanisms of twins in hexagonal metals
journal, June 2017


An image force theorem for dislocations in anisotropic bicrystals
journal, October 1974


EAM potential for magnesium from quantum mechanical forces
journal, May 1996

  • Liu, Xiang-Yang; Adams, James B.; Ercolessi, Furio
  • Modelling and Simulation in Materials Science and Engineering, Vol. 4, Issue 3
  • DOI: 10.1088/0965-0393/4/3/004

Periodic Segregation of Solute Atoms in Fully Coherent Twin Boundaries
journal, May 2013


Works referencing / citing this record:

Twin hopping in nanolayered Zr-2.5Nb
text, January 2020


Twin hopping in nanolayered Zr-2.5Nb
journal, April 2020


Twin hopping in nanolayered Zr-2.5Nb
text, January 2020