Grain refinement and mechanism of CAl0.5W0.5 compound in Mg-Al alloys

稀有金属（英文版）, 2010, 29(6): 630-934. doi: 10.1007/s12598-010-0183-3

^1, , ^2, , ^3, , ^4, , ^5,

1.School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China;State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Changchun 130022, China

2.School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China

3.State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Changchun 130022, China

4.School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China

5.State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Changchun 130022, China

基金项目: the Doctoral Foundation of Henan Polytechnic University(648248) the Science and Technology Program of Changchun(05GG54)

Grain refinement and mechanism of CAl0.5W0.5 compound in Mg-Al alloys

LIE Baozhong ^1, , FAN Yanping ^2, , PENG Qiuming ^3, , MI Guofa ^4, , WANG Limin ^5,

1.School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China;State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Changchun 130022, China

2.School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China

3.State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Changchun 130022, China

4.School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China

5.State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Changchun 130022, China

Keywords： magnesium alloys

The effect of CAl0.5W0.5(CAW)compound on the grain refinement of Mg-Al based alloys was investigated.The results show that CAW compound is an effective and active grain refiner.The grain size of binary Mg-Al alloys is more than 500μm,and it is changed to about 110μm with a 1 wt.% CAW addition.The hardness increased with the decease of grain size monotonously.The mechanical properties are improved by the addition.The fine grain size is mainly ascribed to the dispersed Al2CO particles,which are very potent nucleating substrates for Mg-Al alloys.The nucleation cores formed by chemical reaction directly are well-distributed in the matrix.

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