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Enhancing strength and ductility of Mg-Zn-Gd alloy via slow-speed extrusion combined with pre-forging
Jiang, M. G.; Xu, C.; Nakata, T.; Yan, H.; Chen, R. S.; Kamado, S.; Yan, H; Chen, RS (reprint author), Chinese Acad Sci, Inst Met Res, Grp Magnesium Alloys & Their Applicat, 62 Wencui Rd, Shenyang 110016, Peoples R China.
2017-02-15
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume694Pages:1214-1223
AbstractMg-1.58Zn-0.52Gd (wt.%) alloy was subjected to slow-speed extrusion at 350 degrees C and 400 degrees C combined with hot pre-forging. The extruded alloy without pre-forging exhibited a bimodal microstructure, consisting of fine dynamically recrystallized (DRXed) grains and coarse unDRXed grains elongated along the extrusion direction, and strong basal texture, while pre-forging changed the bimodal structure into fully DRXed microstructure with finer grains and weaker extrusion texture. The fine and homogeneous extruded microstructure in the pre-forged alloy was mainly ascribed to the combined effect of refined starting microstructure just before extrusion, continuous DRX mechanism during extrusion and pinning effect induced by fine Mg3Zn3Gd2 precipitates. The pre-forged alloy exhibited superior balance of strength and ductility, as well as yield asymmetry, to the non-forged alloy after extrusion. The pre-forged alloy extruded at 350 degrees C and 400 degrees C showed highly improved elongation of 27.9% and 34.8%, respectively, mainly due to the formation of fully DRXed microstructure with fine grains through suppressing the activity of {10 (1) over bar 1} contraction and {10 (1) over bar 1}-{10 (1) over bar 2} double twins during tensile deformation. (C) 2016 Elsevier B.V. All rights reserved.; Mg-1.58Zn-0.52Gd (wt.%) alloy was subjected to slow-speed extrusion at 350 degrees C and 400 degrees C combined with hot pre-forging. The extruded alloy without pre-forging exhibited a bimodal microstructure, consisting of fine dynamically recrystallized (DRXed) grains and coarse unDRXed grains elongated along the extrusion direction, and strong basal texture, while pre-forging changed the bimodal structure into fully DRXed microstructure with finer grains and weaker extrusion texture. The fine and homogeneous extruded microstructure in the pre-forged alloy was mainly ascribed to the combined effect of refined starting microstructure just before extrusion, continuous DRX mechanism during extrusion and pinning effect induced by fine Mg3Zn3Gd2 precipitates. The pre-forged alloy exhibited superior balance of strength and ductility, as well as yield asymmetry, to the non-forged alloy after extrusion. The pre-forged alloy extruded at 350 degrees C and 400 degrees C showed highly improved elongation of 27.9% and 34.8%, respectively, mainly due to the formation of fully DRXed microstructure with fine grains through suppressing the activity of {10 (1) over bar 1} contraction and {10 (1) over bar 1}-{10 (1) over bar 2} double twins during tensile deformation. (C) 2016 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, 62 wencui rd, shenyang 110016, peoples r china ; [jiang, m. g.] univ chinese acad sci, 19 yuquan rd, beijing 100049, peoples r china ; [xu, c. ; nakata, t. ; kamado, s.] nagaoka univ technol, dept mech engn, nagaoka, niigata 9402188, japan
KeywordMagnesium Alloy Extrusion Forging Microstructure Mechanical Properties
Subject AreaChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationState Key Program of National Natural Science of China [51531002]; National Natural Science Foundation of China (NSFC) [51601193, 51301173]; National Key Research and Development Program of China [2016YFB0301104]; National Basic Research Program of China (973 Program) [2013CB632202]; JST; Advanced Low Carbon Technology Research and Development Program (ALCA) [12102886]; JSPS [16K18266]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/78294
Collection中国科学院金属研究所
Corresponding AuthorYan, H; 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
Jiang, M. G.,Xu, C.,Nakata, T.,et al. Enhancing strength and ductility of Mg-Zn-Gd alloy via slow-speed extrusion combined with pre-forging[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2017,694:1214-1223.
APA Jiang, M. G..,Xu, C..,Nakata, T..,Yan, H..,Chen, R. S..,...&Chen, RS .(2017).Enhancing strength and ductility of Mg-Zn-Gd alloy via slow-speed extrusion combined with pre-forging.JOURNAL OF ALLOYS AND COMPOUNDS,694,1214-1223.
MLA Jiang, M. G.,et al."Enhancing strength and ductility of Mg-Zn-Gd alloy via slow-speed extrusion combined with pre-forging".JOURNAL OF ALLOYS AND COMPOUNDS 694(2017):1214-1223.
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