稀土学报（英文版）
稀土學報（英文版）
희토학보（영문판）
JOURNAL OF RARE EARTHS
2014年
1期
52-56
,共5页
胡光山%张丁非%郭非%蒋璐瑶%余大亮%潘复生
鬍光山%張丁非%郭非%蔣璐瑤%餘大亮%潘複生
호광산%장정비%곽비%장로요%여대량%반복생
Mg-Zn-Mn-Sn-Nd alloy%neodymium%microstructure%mechanical properties%rare earths
The microstructure and mechanical properties of as-cast and extruded Mg-6Zn-1Mn-4Sn-xNd (x=0, 0.5, 1.0, 1.5) alloys were investigated by means of optical microscopy (OM), X-ray diffraction (XRD), scanning electron microscopy (SEM) and tensile test. The results showed that the dendrites sizes of these alloys were decreased by the addition of Nd. The phase compositions of the as-cast Mg-Zn-Mn-Sn-Nd alloys were dendriticα-Mg, MgZn2, Mg2Sn, T phase and MgSnNd ternary phase. The mechanical proper-ties of the as-extruded alloys were improved due to the refined equiaxed grains and dispersive Mg2Sn and MgSnNd second phases. The comparison of the theoretical yield strength with the experimental yield strength revealed that the yield strength model of the as-extruded alloys should be modified asσys=σMg+σgb+σss+σsp.
