Plastic deformation of magnesium alloy subjected to compression-first cyclic loading

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TypeArticle
Proceedings titleMagnesium Technology
ConferenceMagnesium Technology 2011 - TMS 2011 Annual Meeting and Exhibition, 27 February 2011 through 3 March 2011, San Diego, CA
ISSN1545-4150
ISBN9781118029367
Pages595597; # of pages: 3
SubjectAl alloys; Compressive loading; Cyclic loadings; Deformation mechanism; Deformation twinning; Detwinning; Diffraction peaks; Elastic-plastic transition; Grain orientation; In-situ; In-situ neutron diffraction; Nonlinear behavior; Plastic deformation behavior; Tensile loading; Exhibitions; Extrusion; Magnesium; Magnesium alloys; Neutron diffraction; Poles; Precipitation (chemical); Tensile strength; Twinning; Unloading; Plastic deformation
AbstractIn-situ neutron diffraction has been employed to study the deformation mechanisms in a precipitation-hardened and extruded Mg-8.5wt.% Al alloy subjected to compression followed by reverse tension. The starting texture is such that the basal poles of most grains are oriented normal to the extrusion axis and a small portion of grains are oriented with the basal pole parallel to the extrusion axis. Diffraction peak intensities for several grain orientations monitored in-situ during deformation show that deformation twinning plays an important role in the elastic-plastic transition and subsequent plastic deformation behavior. Significant non-linear behavior is observed during unloading after compression and appears to be due to detwinning. This effect is much stronger after compressive loading than after tensile loading.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Canadian Neutron Beam Centre (CNBC-CCFN)
Peer reviewedYes
NPARC number21271552
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Record identifier8bbdfe75-0a81-4dd9-a8f0-9cd90e47df52
Record created2014-03-24
Record modified2016-05-09
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