EFFECT OF ZIRCONIUM ON HIGH TEMPERATURE TENSILE PROPERTIES OF PRECIPITATION-HARDENED MG-ND-ZN CASTING ALLOY

摘要：

Influences of Zr addition on microstructure and tensile properties at ambient and elevated temperatures have been investigated for precipitation-hardened Mg-3％Nd-0.6％Zn and Mg-3％Nd-0.6％Zn-0.2％Zr casting alloys. By the addition of Zr, the average grain size of α-(Mg) phase decreases remarkably. In T6-treated state, the Mg-3％Nd-0.6％Zn-0.2％Zr alloy shows higher YS, UTS and elongation at RT, 150℃ and 200℃, compared to those of the Zr-free alloy. Better creep resistance is observed in the Zr-containing alloy at 175℃/120MPa condition, while its creep resistance becomes inferior to that of the Zr-free alloy at 215℃/80MPa and 250℃/40MPa conditions. The discrepancy between tensile and creep properties is discussed in relation to microstructural evolution.

关键词： Cast Mg-Nd-Zn alloy zirconium high temperature tensile properties creep resistance

作者: JOONG-HWAN JUN KI-DUG SEONG MIN-HA LEE

作者单位: Korea Institute of Industrial Technology, Incheon 406-840, Republic of Korea

会议类型: 国际会议

会议名称: 第五届先进材料与加工国际会议(Fifth International Conference on Advanced Materials and Processing ICAMP-5)

会议地点: 哈尔滨

会议语种:英文

页码: 966-971

在线出版日期: 2008-09-03（万方平台首次上网日期，不代表论文的发表时间）