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Twinning and the ductility of magnesium alloys:Part I: “Tension” twins

Authors
Journal
Materials Science and Engineering A
0921-5093
Publisher
Elsevier
Publication Date
Volume
464
Identifiers
DOI: 10.1016/j.msea.2006.12.037
Keywords
  • Tensile Test
  • Ductility
  • Work Softening
  • Twinning

Abstract

Abstract Magnesium and its alloys do not in general undergo the same extended range of plasticity as their competitor structural metals. The present work is part I of a study that examines some of the roles deformation twinning might play in the phenomenon. A series of tensile test results are reported for the common wrought alloy AZ31. These data are employed in conjunction with a simple constitutive model to argue that { 1   0   1 ¯   2 } twinning (which gives extension along the c-axis) can increase the uniform elongation in tensile tests. This effect appears to be similar to that seen in Ti, Zr and Cu–Si and in the so called TWIP phenomenon in steel.

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