Effect of mold temperature on microstructure and mechanical properties of rheo-squeeze casting Mg-3Nd-0.2Zn-0.4Zr alloy

被引：7
作者：
Chen, Yushi [1 ,2 ]
Wu, Guohua [1 ,2 ]
Liu, Wencai [1 ,3 ,4 ]
Zhang, Liang [1 ,2 ]
Wang, Quan [1 ,2 ]
机构：
[1] Shanghai Jiao Tong Univ, Natl Engn Res Ctr Light Alloy Net Forming, Shanghai 200240, Peoples R China
[2] Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China
[3] Shanghai Jiao Tong Univ, Key State Lab Met Matrix Composite, Shanghai 200240, Peoples R China
[4] Shanghai Light Alloy Net Forming Natl Engn Res Ct, Shanghai 201615, Peoples R China
来源：
JOURNAL OF MATERIALS RESEARCH | 2017年 / 32卷 / 22期
关键词：
Mg; alloy; casting; AZ91D MAGNESIUM ALLOY; ZR ALLOY; TENSILE PROPERTIES; SEMISOLID SLURRY; ALUMINUM-ALLOY; HEAT-TREATMENT; MG; EVOLUTION; BEHAVIOR; ZN;
D O I：
10.1557/jmr.2017.413
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of mold temperature on microstructure and mechanical properties of a rheo-squeeze casting (RSC) Mg-3Nd-0.2Zn-0.4Zr (NZ30K) alloy were investigated. The results indicated that the rise of mold temperature contributed to the increase of particle size and alloy density and the decrease of dislocation density. The rapid coarsening and then the normal growth of the particles during solution treatment were observed, and the long-rod-like Zn2Zr3 phase occurred. After age treatment, rod-like precipitate was found in the conventional squeeze casting (CSC) alloy, while two types of precipitates including phase and small plate-like phase were observed in the RSC alloy. The amount of Zn2Zr3 phase was increased with rising mold temperature. Compared with the T6-treated CSC sample, the T6-treated RSC sample presented higher mechanical properties due to the larger precipitation strengthening contribution, and the yield strength, ultimate tensile strength, and elongation were up to 160 MPa, 296 MPa, and 7.7%.
引用
收藏
页码：4206 / 4218
页数：13
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