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Twinning, recrystallization and texture development during multi-directional impact forging in an AZ61 Mg alloy
Jiang, M. G.; Yan, H.; Chen, R. S.; hyan@imr.ac.cn; rschen@imr.ac.cn
2015
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume650Pages:399-409
AbstractMulti-directional impact forging (MDIF) with high strain rate shows high grain refinement efficiency and texture randomization effect in magnesium alloys. AZ61 Mg alloy was subjected to MDIF process, and the related grain refinement mechanisms and texture development were investigated. MDIF resulted in a homogeneous microstructure with fine grains of 11 mu m and non-basal texture, which was ascribed to the consecutive twinning and dynamic recrystallization (DRX). During the early forging passes, twin-induced DRX associated with {10-11} contraction and {10-11}-{10-12} double twins, and the coalescence and intersection of {10-12} extension twins with various variants effectively refined the coarse original grains and randomized the texture. With continuous forging, continuous and discontinuous DRX subsequently took place and eventually led to the fully DRXed microstructure and double-peak texture. Besides, fine spherical beta-Mg17Al12 particles were dynamically precipitated along the original grain boundaries, acting as the preferred nucleation sites for DRX by particle-stimulated nucleation mechanism (PSN). Meanwhile, these particles became effective pinning obstacles for suppressing the DRXed grain growth. (C) 2015 Elsevier B.V. All rights reserved.
description.department[jiang, m. g. ; yan, h. ; chen, r. s.] chinese acad sci, inst met res, grp magnesium alloys & their applicat, shenyang 110016, peoples r china ; [jiang, m. g.] univ chinese acad sci, beijing 100049, peoples r china
KeywordMagnesium Alloy Forging Twinning Dynamic Recrystallization Texture
Funding OrganizationGeneral Motors; National Basic Research Program of China (973 Program) [2013CB632202]; National Natural Science Foundation of China (NSFC) [51301173]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/75229
Collection中国科学院金属研究所
Corresponding Authorhyan@imr.ac.cn; rschen@imr.ac.cn
Recommended Citation
GB/T 7714
Jiang, M. G.,Yan, H.,Chen, R. S.,et al. Twinning, recrystallization and texture development during multi-directional impact forging in an AZ61 Mg alloy[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2015,650:399-409.
APA Jiang, M. G.,Yan, H.,Chen, R. S.,hyan@imr.ac.cn,&rschen@imr.ac.cn.(2015).Twinning, recrystallization and texture development during multi-directional impact forging in an AZ61 Mg alloy.JOURNAL OF ALLOYS AND COMPOUNDS,650,399-409.
MLA Jiang, M. G.,et al."Twinning, recrystallization and texture development during multi-directional impact forging in an AZ61 Mg alloy".JOURNAL OF ALLOYS AND COMPOUNDS 650(2015):399-409.
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