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Microstructure, texture and mechanical properties in an as-cast AZ61 Mg alloy during multi-directional impact forging and subsequent heat treatment
Jiang, M. G.; Yan, H.; Chen, R. S.; hyan@imr.ac.cn; rschen@imr.ac.cn
2015
Source PublicationMATERIALS & DESIGN
ISSN0261-3069
Volume87Pages:891-900
AbstractMulti-directional impact forging (MDIF) and subsequent heat treatment were applied to an as-cast AZ61 Mg alloy and the microstructure, texture evolution and mechanical properties were systematically investigated. The microstructural evolution during MDIF was classified into twinning-active and dynamic recrystallization (DRX)-predominant stages. During the early forging passes, a complicated twinning behavior was observed, including {10-12} primary, {10-12}-{10-12} secondary and {10-12}-{10-12}-{10-12} ternary twins with various twin variants, and even detwinning behavior. With further continuous forging, {10-12} twins disappeared leading to the formation of coarse DRXed grains, and fine DRXed grains began to nucleate at serrated grain boundaries of the coarse DRXed grains due to discontinuous DRX mechanism and progressively consumed the coarse DRXed grains, eventually resulting in a bimodal microstructure. Meanwhile, as-cast random texture turned into a special non-basal texture. After subsequent heat treatment at 400 degrees C for 2 h, the coarse eutectic network completely disappeared with fine beta-Mg17AlI2 particles uniformly locating at grain boundaries and the non-basal texture stayed stable, thereby resulting in a good balance of strength (ultimate tensile strength of 259 MPa) and ductility (20.6%). (C) 2015 Elsevier Ltd. All rights reserved.
description.department[jiang, m. g. ; yan, h. ; chen, r. s.] chinese acad sci, grp magnesium alloys & their applicat, inst met res, shenyang 110016, peoples r china ; [jiang, m. g.] univ chinese acad sci, beijing 100049, peoples r china
KeywordMagnesium Alloy Forging Twinning Dynamic Reaystallization Texture Mechanical Properties
Funding OrganizationNational 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/321006/74997
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. Microstructure, texture and mechanical properties in an as-cast AZ61 Mg alloy during multi-directional impact forging and subsequent heat treatment[J]. MATERIALS & DESIGN,2015,87:891-900.
APA Jiang, M. G.,Yan, H.,Chen, R. S.,hyan@imr.ac.cn,&rschen@imr.ac.cn.(2015).Microstructure, texture and mechanical properties in an as-cast AZ61 Mg alloy during multi-directional impact forging and subsequent heat treatment.MATERIALS & DESIGN,87,891-900.
MLA Jiang, M. G.,et al."Microstructure, texture and mechanical properties in an as-cast AZ61 Mg alloy during multi-directional impact forging and subsequent heat treatment".MATERIALS & DESIGN 87(2015):891-900.
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