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Indexed by:Journal Papers

Date of Publication:2015-06-25

Journal:MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

Included Journals:SCIE、EI、Scopus

Volume:638

Page Number:190-196

ISSN No.:0921-5093

Key Words:Magnesium alloy; Asymmetrical rolling; Finite element method; Microstructure; Mechanical properties

Abstract:The asymmetric reduction rolling (ARR) with a support plate at the entrance was proposed and carried out on the AZ31 magnesium alloy. The deformation mechanism of the ARR process was analyzed and demonstrated by finite element method (FEM). The microstructures, micro-textures and tensile properties of the ARRed sheet were examined by optical microscopy (OM), electron backscattered diffraction (EBSD) and tensile tests. The results show that a large shear stress throughout the thickness of sheet can be introduced and promote the occurrence of dynamic recrystallization during ARR process, resulting in the homogeneous microstructure with much finer grains and weakened basal texture, which significantly improve the mechanical properties of AZ31 Mg alloys sheet. (C) 2015 Elsevier B.V. All rights reserved.