Enhanced fatigue properties of cast AZ80 Mg alloy processed by cyclic torsion and low-temperature annealing

Qinghuan Huo, Zhenyu Xiao, Xuyue Yang, Daisuke Ando, Yuji Sutou, Junichi Koike

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

Abstract

In this work, cyclic torsion and low-temperature annealing was applied to a cast AZ80 Mg alloy. After processing, the grains were refined in the outer region of the twisted samples whereas coarse grains remained in the central region. Meanwhile, a large number of {10-12} twins were generated in the outer region but only a few twins were observed in the central region. Both the tensile and compressive yield stresses were increased by grain refinement. At the same stress amplitude in stress-controlled fatigue tests, the strain energy was decreased. The fatigue limit was increased from 70 to 120 MPa, an increase attributed to pre-twinning induced by cyclic torsion.

Original languageEnglish
Pages (from-to)52-59
Number of pages8
JournalMaterials Science and Engineering A
Volume696
DOIs
Publication statusPublished - 2017 Jun 1

Keywords

  • Fatigue
  • Magnesium alloy
  • Torsion
  • Twinning

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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