Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 464, Issue 1-2, Pages 8-16Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2007.02.109
Keywords
tensile test; ductility; work softening; twinning
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Magnesium and its alloys do not in general undergo the same extended range of plasticity as their competitor structural metals. The present work presents part 11 of a study that examines some of the roles deformation twinning might play in the phenomenon. A series of tensile and compression tests results are reported for common wrought alloys: AD31, ZK60 and ZM20. These data are combined with EBSD analysis and simple flow stress models to argue the following: (i) that contraction double twinning (which enables contraction along the c axis) can decrease the uniform elongation, and (ii) that compression double twinning can also account for shear failure at low strains. The last of these is described as a combined consequence of strain softening of the continuum and the local generation of twin sized voids. (c) 2007 Elsevier B.V. All rights reserved.
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