Mechanical behaviour of AZ31 magnesium alloy with the laminate and gradient structure

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Xiaohui Yan
  • Xiangchen Meng
  • Lan Luo
  • Yuhai Jing
  • Guangbin Yi
  • Yong Liu

Detail(s)

Original languageEnglish
Pages (from-to)3059-3077
Journal / PublicationPhilosophical Magazine
Volume99
Issue number24
Online published5 Sep 2019
Publication statusPublished - 2019

Abstract

A laminate and gradient structured (LGS) AZ31 magnesium alloy was produced via a combination of surface mechanical attrition treatment (SMAT) and accumulative roll-bonding (ARB) in an attempt to improve the AZ31 strength-ductility relationship. The effects of the rolling temperature and number of passes on the microstructure and mechanical properties were researched. The LGS AZ31 Mg alloy microstructure included periodic distributions of fine grain (FG) layers, coarse grain (CG) layers, and FG layers in which the grain size exhibited a gradient transition. A depth-dependent gradient microhardness was generated because of the corresponding gradient microstructure. The effect of the LGS AZ31 Mg alloy on grain size-dependent strengthening mechanisms was researched. The yield and ultimate tensile strengths of the alloy improved dramatically and there was a slight decrease in the fracture elongation. The tensile properties of the sample present good strength-ductility relationships. This is attributed to LGS. The microstructure could change the crack propagation path and enhance alloy strength without much harm to plasticity. The overall influences of SMAT and ARB on mechanical properties, which include dynamic recrystallisation, dislocation activity, and the influences of interfaces, were researched. To illuminate the differences in the deformation behaviours of FG and CG layer microstructures, tensile test samples were imaged via SEM.

Research Area(s)

  • accumulative roll-bonding, laminate and gradient structure, Magnesium alloy, mechanical properties, microstructure, surface mechanical attrition treatment

Citation Format(s)

Mechanical behaviour of AZ31 magnesium alloy with the laminate and gradient structure. / Yan, Xiaohui; Meng, Xiangchen; Luo, Lan et al.

In: Philosophical Magazine, Vol. 99, No. 24, 2019, p. 3059-3077.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review