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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
发表期刊JOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
卷号650页码:399-409
摘要Multi-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.
部门归属[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
关键词Magnesium Alloy Forging Twinning Dynamic Recrystallization Texture
资助者General Motors; National Basic Research Program of China (973 Program) [2013CB632202]; National Natural Science Foundation of China (NSFC) [51301173]
收录类别sci
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/75229
专题中国科学院金属研究所
通讯作者hyan@imr.ac.cn; rschen@imr.ac.cn
推荐引用方式
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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