The types and roles of deformation twinning in AZ31 Mg alloys

Junichi Koike, Takeo Miyamura, Akira Nishinoiri, Manabu Enoki

Research output: Contribution to journalConference articlepeer-review


Rolled sheets of AZ31 magnesium alloys were tensile tested at room temperature. Twinning behavior was observed at various strain levels up to a pint of fracture, using an optical microscope, an orientation imaging microscope and an acoustic emission system. Twinned area was increased in two separate stages with strain. Initial rapid increase was observed near the yield point, due to the formation of wide lenticular twins. This was followed by another rapid increase close to the failure point, due to the formation of narrow banded twins. Acoustic emission (AE) signals also exhibited two separate stages with strain, which enabled us to relate each twin type with FFTed AE signals. The each type of twin will be discussed in light of its role on deformation and fracture mechanisms.

Original languageEnglish
Pages (from-to)523
Number of pages1
JournalMagnesium Technology
Publication statusPublished - 2005
Event2005 TMS Annual Meeting - San Francisco, CA, United States
Duration: 2005 Feb 132005 Feb 17


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