Effect of predeformation on semi-solid microstructure of ZK60+RE magnesium alloy  

作　　者：赵祖德 陈强 王艳彬 舒大禹 

机构地区：[1]Southwest Technique and Engineering Institute

出　　处：《中国有色金属学会会刊：英文版》2009年第3期535-539,共5页Transactions of Nonferrous Metals Society of China

摘　　要：Microscopical techniques were used to provide the semi-solid microstructure evolutions of ZK60+RE alloys formed by compression and equal channel angular extrusion(ECAE), respectively. It is found that after compression and ECAE, as-cast microstructures exhibit an obvious directional characteristic. The predeformation exerts a significant influence on the formation of thixotropic microstructures during partial remelting. Coalescence and Ostwald ripening are operative in the semi-solid mixture for both compression and ECAE formed alloys. Furthermore, the degree of spheroidization of ECAE formed alloy is better than that of compression formed alloy in appearance.Microscopical techniques were used to provide the semi-solid microstructure evolutions of ZK60＋RE alloys formed by compression and equal channel angular extrusion（ECAE）, respectively. It is found that after compression and ECAE, as-cast microstructures exhibit an obvious directional characteristic. The predeformation exerts a significant influence on the formation of thixotropic microstructures during partial remelting. Coalescence and Ostwald ripening are operative in the semi-solid mixture for both compression and ECAE formed alloys. Furthermore, the degree of spheroidization of ECAE formed alloy is better than that of compression formed alloy in appearance.

关 键 词：稀土镁合金 半固态组织 等通道转角挤压 ECAE 组织演变 显微技术 稀土合金 部分重熔 

分 类 号：TG146.22[一般工业技术—材料科学与工程] TG146.21[金属学及工艺—金属材料]