High-strength wrought magnesium alloy with dense nano-scale spherical precipitate  

作　　者：YU WenBin CHEN ZhiQian CHENG NanPu GAN BingTai HE Hong LI XueLian HU JinZhu 

机构地区：[1]School of Materials Science and Engineering, Southwest University, Chongqing 400715, China

出　　处：《Chinese Science Bulletin》2007年第13期1867-1871,共5页

基　　金：the Development Foundation of Southwest University (Grant No. SWNUF2004009)

摘　　要：This paper reported the influences of Yb addition on the precipitate and mechanical properties of wrought magnesium alloy ZK60. The ingots of ZK60-1.78Yb (wt%, 0.26 at%) alloys were cast using permanent mould and extruded at 370℃ . By means of TEM and HRTEM, it was observed that Yb affected the precipitate and precipitation of ZK60-1.78Yb alloys significantly. Dynamic precipitation occurred in the as-extruded alloy and spherical nano-scale precipitate with high density and homoge-neity exhibited in the aged alloys. The precipitate particles were about 5-20 nm in diameter, 10-30 nm in average space length. The tensile test results showed that the ZK60-1.78Yb alloy had excellent pre-cipitation strengthening response with the maximum tensile strength 417.5 MPa at ambient tempera-ture.This paper reported the influences of Yb addition on the precipitate and mechanical properties of wrought magnesium alloy ZK60. The ingots of ZK60-1.78Yb （wt%, 0.26 at%） alloys were cast using permanent mould and extruded at 370~C. By means of TEM and HRTEM, it was observed that Yb affected the precipitate and precipitation of ZK60-1.78Yb alloys significantly. Dynamic precipitation occurred in the as-extruded alloy and spherical nano-scale precipitate with high density and homogeneity exhibited in the aged alloys. The precipitate particles were about 5-20 nm in diameter, 10-30 nm in average space length. The tensile test results showed that the ZK60-1.78Yb alloy had excellent precipitation strengthening response with the maximum tensile strength 417.5 MPa at ambient temperature.

关 键 词：镁合金 镱元素 动力学 沉淀物 张力强度 

分 类 号：TG13[一般工业技术—材料科学与工程]