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

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Proceedings titleMagnesium Technology
ConferenceMagnesium Technology 2011 - TMS 2011 Annual Meeting and Exhibition, 27 February 2011 through 3 March 2011, San Diego, CA
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.
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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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