Microstructural evolution and mechanical properties of a Mg-Gd-Y alloy processed by impact forging

CORC > 金属研究所 > 中国科学院金属研究所

	Microstructural evolution and mechanical properties of a Mg-Gd-Y alloy processed by impact forging
	Shah, S. S. A.; Wu, D.; Wang, W. H.; Chen, R. S.; Wu, D; Chen, RS (reprint author), Chinese Acad Sci, Inst Met Res, Grp Magnesium Alloys & Their Applicat, 62 Wenhui Rd, Shenyang 110016, Liaoning, Peoples R China.
刊名	ELSEVIER SCIENCE SA
	2017-08-15
卷号	702 页码:153-160
关键词	Magnesium Alloys Forging Twinning Dynamic Recrystallization Grain Refinement Mechanical Properties
ISSN号	0921-5093
英文摘要	A multi-direction impact forging (MDIF) has been applied to a solutionized Mg-Gd-Y-Zr alloy in this work. An inhomogeneous microstructure, mostly fine grains, some twins and a few of coarse deformed grains were achieved with a weak and non-basal texture after 50 forging passes. Due to retarded DRX behavior by RE solute drag effect and the sharp drop of forging temperature, the alloy did not obtain a full DRX microstructure until 100 forging passes. During MDIF process, density of extension twins initially were induced in microstructure, which effectively refined the coarse grains by dividing and intersecting each other. In turn, those twining regions provided nucleation sites for DRX, and a continuous dynamic recrystallization converted most of the twin-matrix laminates to fine equi-axial grains. The ultimate tensile strength and elongation to failure of GW94 alloy were continuously improved during MDIF process, from less than 200 MPa and 2% of the initial solutionized specimen to more than 300 MPa and 7% of the one by 50 forging passes respectively.; A multi-direction impact forging (MDIF) has been applied to a solutionized Mg-Gd-Y-Zr alloy in this work. An inhomogeneous microstructure, mostly fine grains, some twins and a few of coarse deformed grains were achieved with a weak and non-basal texture after 50 forging passes. Due to retarded DRX behavior by RE solute drag effect and the sharp drop of forging temperature, the alloy did not obtain a full DRX microstructure until 100 forging passes. During MDIF process, density of extension twins initially were induced in microstructure, which effectively refined the coarse grains by dividing and intersecting each other. In turn, those twining regions provided nucleation sites for DRX, and a continuous dynamic recrystallization converted most of the twin-matrix laminates to fine equi-axial grains. The ultimate tensile strength and elongation to failure of GW94 alloy were continuously improved during MDIF process, from less than 200 MPa and 2% of the initial solutionized specimen to more than 300 MPa and 7% of the one by 50 forging passes respectively.
学科主题	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
语种	英语
资助机构	State Key Program of National Natural Science Foundation 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]
公开日期	2018-01-10
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/79148]
专题	金属研究所_中国科学院金属研究所
通讯作者	Wu, D; Chen, RS (reprint author), Chinese Acad Sci, Inst Met Res, Grp Magnesium Alloys & Their Applicat, 62 Wenhui Rd, Shenyang 110016, Liaoning, Peoples R China.
推荐引用方式 GB/T 7714	Shah, S. S. A.,Wu, D.,Wang, W. H.,et al. Microstructural evolution and mechanical properties of a Mg-Gd-Y alloy processed by impact forging[J]. ELSEVIER SCIENCE SA,2017,702:153-160.
APA	Shah, S. S. A.,Wu, D.,Wang, W. H.,Chen, R. S.,Wu, D,&Chen, RS .(2017).Microstructural evolution and mechanical properties of a Mg-Gd-Y alloy processed by impact forging.ELSEVIER SCIENCE SA,702,153-160.
MLA	Shah, S. S. A.,et al."Microstructural evolution and mechanical properties of a Mg-Gd-Y alloy processed by impact forging".ELSEVIER SCIENCE SA 702(2017):153-160.