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Superplasticity of multi-directional impact forged Mg-Gd-Y-Zr alloy
Li, J. L.; Wu, D.; Yang, Q. B.; Chen, R. S.; Wu, D; Chen, RS (reprint author), Chinese Acad Sci, Inst Met Res, Grp Magnesium Alloys & Their Applicat, 62 Wencui Rd, Shenyang 110016, Peoples R China.
2016-07-05
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume672Pages:27-35
AbstractA novel multi-directional impact forging (MDIF) process was successfully applied to a Mg-Gd-Y-Zr alloy and the superplasticity of the MDIFed alloy was investigated. It was shown that the initial microstructure after MDIF had a unique characteristic of coarse grains decorated by profuse tension twins. Tensile tests at various temperatures and initial strain rates displayed that the MDIFed alloy exhibited superplasticity at temperatures higher than 400 degrees C, especially the maximum elongation of about 300% was achieved at 450 degrees C and 5 x 10(-4) s(-1). It was observed that the initial twin lamellas diminished and even vanished with the occurrence of static recrystallization (SRX) during preheating. The detailed microstructural analysis revealed that SRX during preheating and dynamic recrystallization (DRX) during tensile testing conduced to the superplasticity. With strain rate sensitivity exponent m-value of about 0.32, the superplastic deformation mechanism was supposed to be predominated by glide-controlled dislocation creep assisted by grain boundaries sliding. (C) 2016 Elsevier B.V. All rights reserved.
description.department[li, j. l. ; wu, d. ; yang, q. b. ; chen, r. s.] chinese acad sci, inst met res, grp magnesium alloys & their applicat, 62 wencui rd, shenyang 110016, peoples r china
KeywordForging Mg-gd-y-zr Alloy Superplasticity Recrystallization
Subject AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Natural Science Foundation of China (NSFC) [51301173, 51531002]; National Basic Research Program of China (973 Program) [2013CB632202]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/75800
Collection中国科学院金属研究所
Corresponding AuthorWu, D; Chen, RS (reprint author), Chinese Acad Sci, Inst Met Res, Grp Magnesium Alloys & Their Applicat, 62 Wencui Rd, Shenyang 110016, Peoples R China.
Recommended Citation
GB/T 7714
Li, J. L.,Wu, D.,Yang, Q. B.,et al. Superplasticity of multi-directional impact forged Mg-Gd-Y-Zr alloy[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2016,672:27-35.
APA Li, J. L.,Wu, D.,Yang, Q. B.,Chen, R. S.,Wu, D,&Chen, RS .(2016).Superplasticity of multi-directional impact forged Mg-Gd-Y-Zr alloy.JOURNAL OF ALLOYS AND COMPOUNDS,672,27-35.
MLA Li, J. L.,et al."Superplasticity of multi-directional impact forged Mg-Gd-Y-Zr alloy".JOURNAL OF ALLOYS AND COMPOUNDS 672(2016):27-35.
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