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Home  >  Journal list  >  MATERIALS TRANSACTIONS  >  Vol.48  No.9 (2007)  >  pp.2343-2348

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Deformation and Anelastic Recovery of Pure Magnesium and AZ31B Alloy Investigated by AE

Yunping Li1) and Manabu Enoki1)
1) Department of Materials Engineering, School of Engineering, The University of Tokyo

Extruded pure magnesium and AZ31B alloy were compressed parallel and vertical to extrusion direction. Deformation behavior was investigated in monotonous compression by acoustic emission (AE). Anelastic recovery behavior was observed in cyclic compression-quick unloading-recovery process. AE method was applied in each recovery process to investigate detwinning behavior at different strain levels. It was found that twinned samples vertically compressed easily detwin compared to parallel samples in both pure magnesium and AZ31B alloy. Compared to pure magnesium, twinning in AZ31B alloy is more stable and shows weaker psuedoelasticity. A model of strain dependence on cumulative AE counts from detwinning was proposed and fitting results are in good agreement with experimental data.

Pure magnesium, AZ31B alloy, acoustic emission, anelastic recovery, twinning, detwinning

Received: April 23, 2007
Accepted: May 24, 2007 , Published online: August 25, 2007
Copyright (c) 2007 The Japan Institute of Metals



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