Grain refinement of AZ31 magnesium alloy by Al-Ti-C-Y master alloy  

作　　者：许春香 卢斌峰 吕正玲 梁伟 

机构地区：[1]School of Materials Science and Engineering, Taiyuan University of Technology

出　　处：《Journal of Rare Earths》2008年第4期604-608,共5页稀土学报（英文版）

基　　金：the Natural Science Foundation of Shanxi Province (2007011067);Patent Generalization Project of Shanxi Province (051025)

摘　　要：Al-Ti-C-Y master alloy was prepared by combining SHS technique and melting-casting method. The microstructure of master alloy and its grain-refining effect on AZ31 alloy were investigated by means of OM, XRD, SEM and EDS. Experimental results indicated that the prepared master alloy consisted of α-Al, TiAl3, TiC and Al3Y phases, and exhibited good grain-refining performance of AZ31 alloy. Morphology of α-Mg changed from coarse dendritic to free equiaxed and the average grain size of α-Mg matrix reduced from the original 580 to 170 μm after adding 1.0 wt.% master alloy. The grain refining efficiency of Al-Ti-C-Y master alloy on AZ31 alloy was mainly attributed to heterogeneous nucleation of TiC particles and grain growth restriction of Al-Y compound or TiC at grain boundaries.Al-Ti-C-Y master alloy was prepared by combining SHS technique and melting-casting method. The microstructure of master alloy and its grain-refining effect on AZ31 alloy were investigated by means of OM, XRD, SEM and EDS. Experimental results indicated that the prepared master alloy consisted of α-Al, TiAl3, TiC and Al3Y phases, and exhibited good grain-refining performance of AZ31 alloy. Morphology of α-Mg changed from coarse dendritic to free equiaxed and the average grain size of α-Mg matrix reduced from the original 580 to 170 μm after adding 1.0 wt.% master alloy. The grain refining efficiency of Al-Ti-C-Y master alloy on AZ31 alloy was mainly attributed to heterogeneous nucleation of TiC particles and grain growth restriction of Al-Y compound or TiC at grain boundaries.

关 键 词：Al-Ti-C-Y master alloy grain refinement AZ31 magnesium alloy rare earths 

分 类 号：TG146.21[一般工业技术—材料科学与工程]