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Improving the anisotropy of rolled Mg–3Al–1Zn alloy by pre-strain and annealing

Authors
Journal
Materials Science and Engineering A
0921-5093
Publisher
Elsevier
Publication Date
Volume
616
Identifiers
DOI: 10.1016/j.msea.2014.08.005
Keywords
  • Magnesium Alloy
  • Twinning
  • Annealing
  • Texture
  • Anisotropy

Abstract

Abstract Two steps of pre-strain (pre-compression along TD and subsequent re-compression along RD) and annealing were conducted on the hot-rolled AZ31 Mg alloy. The effects of pre-compression and annealing on the texture and anisotropy modification of AZ31 were investigated by XRD and EBSD observations. The results revealed that the generation of the {10−12} twins in the matrix and {10−12}–{10−12} double twins in the previous {10−12} twins dominated the re-compression along RD. The changes occurred in macro-texture with different pre-compression and re-crystallization texture was observed after annealing. The {10−12}–{10−12} double twins formed in the previous {10−12} twins, which significantly modified the compression behavior along the normal direction (ND). The grain refinement by twin lamellas after pre-strain, together with the crystallographic orientation redistribution after pre-strain and annealing, greatly reduce the mechanical anisotropy along RD, TD and ND.

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