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Indexed by:期刊论文

Date of Publication:2010-07-01

Journal:JOURNAL OF MATERIALS PROCESSING TECHNOLOGY

Included Journals:SCIE、EI、Scopus

Volume:210

Issue:10

Page Number:1270-1275

ISSN No.:0924-0136

Key Words:Magnesium alloy; Twin-roll casting; Microstructure; Mechanical properties

Abstract:Microstructure of twin-roll casted (TRC)Mg-3Al-0.5Mn-0.2Mm (or AM30 + 0 2Mm) alloy strips consisted of columnar dendrites in the surface and equiaxed dendrites in the center regions, as well as widely dispersed fine primary intermetallic compounds located in the interdendritic region Warm rolling of the TRC strips developed both deformation or shear bands and homogeneously dispersed fine particles No evident dynamic recrystallization (DRX) was found in the TRC sheets during warm rolling The dispersed fine particles seemed to retard DRX The warm-rolled TRC sheets showed equiaxed fine grains with an average size of around 8 mu m after annealing at 350 degrees C for 60 min The TRC sheets had superior yield and tensile strengths to ingot cast (IC) samples Elongation was similar to both TRC and IC samples (C) 2010 Elsevier B V All rights reserved.