首页|Significant Bauschinger effect and back stress strengthening in an ultrafine grained pure aluminum fabricated by severe plastic deformation process
Significant Bauschinger effect and back stress strengthening in an ultrafine grained pure aluminum fabricated by severe plastic deformation process
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NSTL
Elsevier
? 2022 The AuthorsBauschinger test in uniaxial tension-compression mode was carried out for the first time on the pure Al specimens having homogeneous ultra-fine grained (UFG) microstructures fabricated by equal-channel angular pressing (ECAP) and subsequent annealing processes. Significant Bauschinger stress (transient softening), Bauschinger energy parameter and their strong dependences on the tensile plastic pre-strain at the very early stage of the tensile deformation were measured in the UFG specimens, in sharp contrast to their coarse-grained (CG) counterpart. The grain size dependence of the Bauschinger effect in pure Al was qualitatively discussed in terms of the back stress arising from the formation of dislocation pile-up against the grain boundary during plastic deformation.
Back stressBauschinger effectMechanical propertiesUltrafine-grained materials
Gao S.、Yoshino K.、Tsuji N.、Terada D.、Kaneko Y.
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Department of Materials Science and Engineering Kyoto University
Department of Mechanical Science and Engineering Chiba Institute of Technology
Department of Mechanical Engineering Osaka City University
NSTL
Elsevier
