Twinning-detwinning behavior during cyclic deformation of magnesium alloy

Lee, Soo Yeol; Wang, Huamiao; Gharghouri, Michael A.

doi:10.3390/met5020881

Twinning-detwinning behavior during cyclic deformation of magnesium alloy

Journal Article · Tue May 26 00:00:00 EDT 2015 · Metals

DOI:https://doi.org/10.3390/met5020881· OSTI ID:1208853

Lee, Soo Yeol ^[1]; Wang, Huamiao ^[2]; Gharghouri, Michael A. ^[3]

Chungnam National Univ., Daejeon (Korea)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Canadian Nuclear Lab., Chalk River, ON (Canada)

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.

View Accepted Manuscript (DOE)

Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1208853

Journal Information:: Metals, Journal Name: Metals Journal Issue: 2 Vol. 5; ISSN 2075-4701; ISSN MBSEC7

Publisher:: MDPICopyright Statement

Country of Publication:: United States

Language:: English

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Reversible plasticity of metallic single crystals at the stage of their residual twinning Chikova, Tamara S.; Bashmakov, Victor I. St. Petersburg Polytechnical University Journal: Physics and Mathematics, Vol. 2, Issue 4 https://doi.org/10.1016/j.spjpm.2016.11.002	journal	December 2016

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