Effect of Pass Thickness Reduction on Microstructure and Formability in AZ31 Magnesium Produced by Differential Speed Rolling

Abstract:

AZ31 magnesium alloy sheets were prepared by multi-pass differential speed rolling (DSR) with small mismatch roll speed ratio. Effect of pass thickness reduction on microstructure, texture and formability at room temperature were investigated. The results showed that the low pass thickness reduction DSR is effective to improve the formability by refining the grain size and weakening the basal texture, which is characterized by the increasing of strain hardening exponent (n value) and elongation as soon as decreasing of yielding ratio and normal anisotropy ratio (r value). With the increasing of pass thickness reduction, more effective grain refinement is achieved due to the forming of deformation bands. While the ability of forming the title basal texture is weakened and the formability is reduced.

• Periodical: Applied Mechanics and Materials (Volumes 152-154)
• Pages: 18-23
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.152-154.18
• Online since: January 2012
• Authors: Wei Jun Xia, Ling Liu, Fu Quan Zhang, Cong Chang Xu
• Keywords: Differential Speed Rolling, Formability, Pass Thickness Reduction, Texture

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