Microstructure and mechanical properties of Mg-4.5Zn-xNd (x=0, 1 and 2, wt%) alloys
Microstructure and mechanical properties of Mg-4.5Zn-xNd (x=0, 1 and 2, wt%) alloys
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DOI：
10.1016/j.msea.2007.06.057
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发表时间：
2008-04
期刊：
影响因子：
6.4
通讯作者：
Jie Yang;Jianli Wang;Lidong Wang;Yao-ming Wu;Limin Wang;Hongjie Zhang
中科院分区：
文献类型：
--
作者：
Jie Yang;Jianli Wang;Lidong Wang;Yao-ming Wu;Limin Wang;Hongjie Zhang
研究了Mg-4. 5 Zn-xNd（x=0、1和2，wt%）合金在603 K下热处理2 h后的显微组织和力学性能。在含Nd合金中观察到T相（Mg-Zn-Nd三元相）。Mg-4.5Zn-1 Nd合金具有最佳的力学性能，其抗拉强度和屈服强度分别为228和79 MPa。与Mg-4.5Zn合金相比，抗拉强度和屈服强度分别提高了51和17 MPa。然而，随着Nd的进一步加入，强度下降，这主要是由于枝晶间共晶的连续性强。还研究了含Nd合金在473和523 K下的变形行为，表明Mg-4.5Zn-2Nd合金在523 K拉伸试验中出现了波特万-勒夏特列效应。
Microstructure and mechanical properties of Mg–4.5Zn–xNd (x=0, 1 and 2, wt%) alloys heat-treated at 603K for 2h have been investigated. T-phase (an Mg–Zn–Nd ternary phase) was observed in the Nd containing alloys. The optimal mechanical properties were obtained in the Mg–4.5Zn–1Nd alloy, and the ultimate tensile strength and yield strength were 228 and 79MPa, respectively. Through comparing with the Mg-4.5Zn alloy, the increments of ultimate tensile strength and yield strength were 51 and 17MPa. However, the strength decreased with further addition of Nd, which was mainly due to the strong continuity of the interdendritic eutectics. The deformation behavior of the Nd containing alloys has also been investigated at 473 and 523K, which indicated the occurrence of Portevin-Le Chatelier effect in the Mg–4.5Zn–2Nd alloy during tensile test at 523K.