首页|Microstructure and Mechanical Property of the Large Cross-Sectioned Mg-Gd-Y-Zn-Zr Alloy Produced by Small Extrusion Ratio
Microstructure and Mechanical Property of the Large Cross-Sectioned Mg-Gd-Y-Zn-Zr Alloy Produced by Small Extrusion Ratio
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In this work,the microstructure and mechanical properties of large cross-sectioned Mg-9Gd-3Y-1.2Zn-0.5Zr(VWZ931)samples produced by the small extrusion ratio has been investigated.The as-extruded VWZ931 sample with diameter of～30 mm can exhibit the high yield strength(YS)of 339 MPa,ultimate tensile strength(UTS)of 387 MPa and elongation of 8.2％,respectively.After peak-aged,the YS and UTS of the Mg samples were significantly increased to 435 MPa and 467 MPa.The small extrusion ratio leads to the low fraction of dynamic recrystallized(DRX)grains in VWZ931 sample,and the texture hardening effect can be fully utilized to achieve high strength.The combined effect of precipitation strength-ening due to the long-period stacking ordered phases and the β'phase,grain boundary strengthening due to the fine DRX grains,heterogeneous deformation-induced strengthening caused by bimodal microstructure,can together contribute to the high strength of present Mg alloy.The findings can shed light on designing other large-sized Mg wrought alloys with high mechanical performance.
Sen Wang、Hucheng Pan、Caixia Jiang、Zhihao Zeng、Zhen Pan、Weineng Tang、Chubin Yang、Yuping Ren、Gaowu Qin
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Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education),College of Materials Science and Engineering,Northeastern University,Shenyang 110819,China
Mg and Mg Alloy Institute,Technology Center,Baosteel Metal Co.,Ltd,China Baowu Steel Group,Shanghai 200940,China
Jiangxi Provincial Engineering Research Center for Magnesium Alloy,Gannan Normal University,Ganzhou 341000,China
National Key Research and Development Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaYoung Elite Scientists Sponsorship Program by China Association for Science and TechnologyFundamental Research Funds for the Central Universities
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