Roles of deformation twinning and dislocation slip in the fatigue failure mechanism of AZ31 Mg alloys

J. Koike, N. Fujiyama, D. Ando, Y. Sutou

Research output: Contribution to journalArticlepeer-review

113 Citations (Scopus)

Abstract

Fatigue tests were performed on AZ31 Mg alloys at room temperature in tension cycles. Deformation twinning of the {101̄2} type was observed both below and above the fatigue limit, indicating that the {101̄2} twins do not contribute directly to fatigue failure. However, prismatic slip and substantial cyclic hardening were observed above the fatigue limit. Progressive hardening gave rise to {1011}-{101̄2} double twinning that led to the formation of large surface steps, cracks and eventual failure.

Original languageEnglish
Pages (from-to)747-750
Number of pages4
JournalScripta Materialia
Volume63
Issue number7
DOIs
Publication statusPublished - 2010 Oct

Keywords

  • Deformation
  • Failure
  • Fatigue
  • Magnesium
  • Twin

ASJC Scopus subject areas

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

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