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Title: Twinning-detwinning behavior during cyclic deformation of magnesium alloy

Abstract

In situ neutron diffraction has been used to examine the deformation mechanisms of a precipitation-hardened and extruded Mg-8.5wt.%Al alloy subjected to (i) compression followed by reverse tension (texture T1) and (ii) tension followed by reverse compression (texture T2). Two starting textures are used: (1) as-extruded texture, T1, in which the basal pole of most grains is normal to the extrusion axis and a small portion of grains are oriented with the basal pole parallel to the extrusion axis; (2) a reoriented texture, T2, in which the basal pole of most grains is parallel to the extrusion axis. For texture T1, the onset of extension twinning corresponds well with the macroscopic elastic-plastic transition during the initial compression stage. The non-linear macroscopic stress/strain behavior during unloading after compression is more significant than during unloading after tension. For texture T2, little detwinning occurs after the initial tension stage, but almost all of the twinned volumes are detwinned during loading in reverse compression.

Authors:
 [1];  [2];  [3]
  1. Chungnam National Univ., Daejeon (Korea)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Canadian Nuclear Lab., Chalk River, ON (Canada)
Publication Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1208853
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Metals
Additional Journal Information:
Journal Volume: 5; Journal Issue: 2; Journal ID: ISSN 2075-4701
Publisher:
MDPI
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; magnesium alloy; deformation; twinning; detwinning; neutron diffraction

Citation Formats

Lee, Soo Yeol, Wang, Huamiao, and Gharghouri, Michael A. Twinning-detwinning behavior during cyclic deformation of magnesium alloy. United States: N. p., 2015. Web. doi:10.3390/met5020881.
Lee, Soo Yeol, Wang, Huamiao, & Gharghouri, Michael A. Twinning-detwinning behavior during cyclic deformation of magnesium alloy. United States. https://doi.org/10.3390/met5020881
Lee, Soo Yeol, Wang, Huamiao, and Gharghouri, Michael A. 2015. "Twinning-detwinning behavior during cyclic deformation of magnesium alloy". United States. https://doi.org/10.3390/met5020881. https://www.osti.gov/servlets/purl/1208853.
@article{osti_1208853,
title = {Twinning-detwinning behavior during cyclic deformation of magnesium alloy},
author = {Lee, Soo Yeol and Wang, Huamiao and Gharghouri, Michael A.},
abstractNote = {In situ neutron diffraction has been used to examine the deformation mechanisms of a precipitation-hardened and extruded Mg-8.5wt.%Al alloy subjected to (i) compression followed by reverse tension (texture T1) and (ii) tension followed by reverse compression (texture T2). Two starting textures are used: (1) as-extruded texture, T1, in which the basal pole of most grains is normal to the extrusion axis and a small portion of grains are oriented with the basal pole parallel to the extrusion axis; (2) a reoriented texture, T2, in which the basal pole of most grains is parallel to the extrusion axis. For texture T1, the onset of extension twinning corresponds well with the macroscopic elastic-plastic transition during the initial compression stage. The non-linear macroscopic stress/strain behavior during unloading after compression is more significant than during unloading after tension. For texture T2, little detwinning occurs after the initial tension stage, but almost all of the twinned volumes are detwinned during loading in reverse compression.},
doi = {10.3390/met5020881},
url = {https://www.osti.gov/biblio/1208853}, journal = {Metals},
issn = {2075-4701},
number = 2,
volume = 5,
place = {United States},
year = {Tue May 26 00:00:00 EDT 2015},
month = {Tue May 26 00:00:00 EDT 2015}
}

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Cited by: 12 works
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Works referenced in this record:

The strengthening effect of Al atoms into Mg–Al alloy: A first-principles study
journal, August 2009


Investigation of deformation mechanisms involved in the plasticity of AZ31 Mg alloy: In situ neutron diffraction and EPSC modelling
journal, November 2008


The crystallography and deformation modes of hexagonal close-packed metals
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journal, March 2010


Role of {10–12} twinning characteristics in the deformation behavior of a polycrystalline magnesium alloy
journal, October 2010


Reorientation and stress relaxation due to twinning: Modeling and experimental characterization for Mg
journal, June 2008


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


In-plane anisotropic deformation behavior of rolled Mg–3Al–1Zn alloy by initial {10–12} twins
journal, May 2013


Study of the mechanical properties of Mg-7.7at.% Al by in-situ neutron diffraction
journal, July 1999


Internal strain and texture evolution during deformation twinning in magnesium
journal, June 2005


Pseudoelastic behavior of magnesium alloy during twinning-dominated cyclic deformation
journal, June 2013


Works referencing / citing this record:

Reversible plasticity of metallic single crystals at the stage of their residual twinning
journal, December 2016