Influence of extrusion temperature on microstructure and mechanical properties of Mg-4Y-4Sm-0.5Zr alloy

被引：14
作者：
Li Da-quan [1 ,2 ]
Wang Qu-dong [1 ]
Ding Wen-jiang [1 ]
Blandin, J. J. [3 ]
Suery, M. [3 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Met Matrix Composites, Natl Engn Res Ctr Light Alloys Net Forming, Shanghai 200240, Peoples R China
[2] Gen Res Inst NonFerrous Met, Natl Engn Res Ctr Nonferrous Met Composites, Beijing 100088, Peoples R China
[3] UJF, Grenoble INP, CNRS, Univ Grenoble,UMR 5266, F-38402 St Martin Dheres, France
来源：
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2010年 / 20卷 / 07期
关键词：
Mg-Y-Sm-Zr alloy; extrusion; heat treatment; ageing; mechanical properties; AZ31 MG ALLOY; MAGNESIUM ALLOY; CREEP-BEHAVIOR; HEAT-TREATMENT; DEFORMATION; MORPHOLOGY; PHASES; ZN;
D O I：
10.1016/S1003-6326(09)60296-X
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The solution-treated Mg-4Y-4Sm-0.5Zr alloy was extruded at temperatures from 325 degrees C to 500 degrees C. Dynamic recrystallization (DRX) completely occurs when the alloy is extruded at 350 degrees C and above. The grains of the extruded alloy are obviously refined by the occurrence of DRX. The average grain size of the extruded alloy increases with increasing the extrusion temperature, leading to a slight decrease of the ultimate tensile strength (UTS) and the yield strength (YS). On the contrary, the UTS and YS of the extruded and aged alloy increase with increasing the extrusion temperature. Values of UTS of 400 MPa, YS larger than 300 MPa and elongation (EL) of 7% are achieved after extrusion at 400 degrees C and ageing at 200 degrees C for 16 h. Both grain refinement and precipitation are efficient strengthening mechanisms for the Mg-4Y-4Sm-0.5Zr alloy.
引用
收藏
页码：1311 / 1315
页数：5
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