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采用电磁感应炉制备了Mg-13Gd-xNd-0.5Zr合金(x=0, 1, 2, 3 mass%),并结合X射线衍射仪、光学显微镜、扫描电镜、能谱仪、电子拉伸实验机等对合金的相组成、微观组织、元素分布、力学性能等进行分析测试。结果表明:Mg-13Gd-xNd-0.5Zr合金组织主要由α-Mg基体和Mg5Gd、Mg41Nd5相组成,Mg5Gd和Mg41Nd5相主要分布在晶界处;稀土元素Nd的加入能够细化合金组织,并引起α-Mg基体晶格畸变;当添加2%的Nd时,合金抗拉强度达到最高245 MPa,与不含Nd合金相比提高了16.33%。
Abstract：Mg-13 Gd-xNd-0.5 Zr alloys(x=0, 1, 2, 3 mass%) were prepared by electromagnetic induction furnace, and phase composition, microstructure, element distribution and mechanical properties of the alloys were analyzed and tested by means of X-ray diffractometer, optical microscope, scanning electron microscopy, energy spectrometer and electronic tensile testing machine. The results show that the microstructure of the Mg-13 Gd-xNd-0.5 Zr alloys is mainly composed of α-Mg matrix, Mg5Gd and Mg41Nd5 phases, and the Mg5Gd and Mg41Nd5 phases are mainly distributed at grain boundaries. The addition of rare earth element Nd can refine the microstructure of the alloys and cause lattice distortion of the α-Mg matrix, and when the content of 2% Nd is added, the tensile strength of the alloys reaches the maximum value of 245 MPa, which is 16.33% higher than that of the alloys without Nd.
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基本信息:
DOI：10.13289/j.issn.1009-6264.2018-0280
中图分类号:TG146.22
引用信息:
[1]陈晓亚,李全安,李志涛等.铸态Mg-13Gd-xNd-0.5Zr合金的组织和性能[J],2018,39(11):22-27.DOI:10.13289/j.issn.1009-6264.2018-0280.
基金信息:
国家自然科学基金(51571084,51171059);; 河南省重点科技攻关计划资助项目(152102210072)