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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.
2017-08-15
发表期刊ELSEVIER SCIENCE SA
ISSN0921-5093
卷号702页码:153-160
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.
部门归属[shah, s. s. a. ; wu, d. ; wang, w. h. ; chen, r. s.] chinese acad sci, inst met res, grp magnesium alloys & their applicat, 62 wenhui rd, shenyang 110016, liaoning, peoples r china ; [shah, s. s. a.] univ chinese acad sci, 19 yuquan rd, beijing 100049, peoples r china
关键词Magnesium Alloys Forging Twinning Dynamic Recrystallization Grain Refinement Mechanical Properties
学科领域Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
资助者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]
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/321006/79148
专题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.
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