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Influence of deformation conditions and texture on the high temperature flow stress of magnesium AZ31
The evolution of hot working flow stress with strain is examined in torsion, uniaxial compression and channel die compression. The flow stress was found to be strongly dependent on texture and deformation mode. At low strains this dependency accounted for a difference in flow stress of up to a factor of two. At higher strains the influence of texture and deformation mode was less marked. The stresses corresponding to an equivalent strain of 0.5 were modelled using a power law expression with an activation energy of 147 kJ/mol and a strain rate exponent of 0.15. The influence of texture and deformation mode on flow stress is rationalised in terms of the influence of prismatic slip, twinning and dynamic recrystallisation on deformation stress and structure.
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Journal
Journal of light metalsVolume
1Issue
3Pagination
167 - 177Publisher
Elsevier ScienceLocation
New York, N.Y.Publisher DOI
ISSN
1471-5317Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2001, Elsevier ScienceUsage metrics
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