期刊论文

Zhu, Hong-mei

英文

中国有色金属学报(英文版)

1003-6326

2014

24

3

605-610

10.1016/S1003-6326(14)63101-0

Project(51201088)supported by the National Natural Science Foundation of China Project(12C0324)supported by the Research Foundation of Education Bureau of Hunan Province,China Project(2011XQD26)supported by Doctoral Scientific Research Foundation of University of South,China Project([2011]76)supported by the Construct Program of the Key Discipline in Hunan Province,China

本校为第一且通讯机构

The effects of Cu addition on the microstructure and mechanical properties of the as-cast magnesium alloy ZK60 were investigated with optical microscope, SEM, TEM, XRD, EPMA and tensile tester. The mechanism by which the mechanical properties are affected by Cu addition was discussed. The results show that Cu can effectively eliminate the intragranular solute segregations in the alloy, and the grain size of the alloy is decreased considerably with increasing the Cu amount. A ternary eutectic phase MgZnCu with a face-centered cubic structure is identified in the Cu-bearing alloys, which predomi...

利用光学显微镜、扫描电子显微镜、透射电子显微镜、X-射线衍射仪、电子探针、拉伸测试仪研究 Cu元素的添加对铸态ZK60镁合金显微组织和力学性能的影响，并讨论了添加Cu改善合金拉伸性能的机制。结果表明，Cu可有效消除ZK60镁合金中存在的晶内偏析，随着Cu含量的增加，合金的晶粒尺寸得到明显细化。在含Cu镁合金中，出现了一种具有面心立方结构的MgZnCu三元共晶相，该相主要富集在晶界处且在合金发生塑性变形时成为微裂纹源。拉伸实验表明，当 Cu 添加量为0.5%～1%时，ZK60镁合金的力学性能得到改善，当添加量达到2%时，合金的力学性能下降。