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通过光学显微镜、扫描电镜、X射线衍射仪、能谱仪和拉伸性能测试等研究了铸态Mg-xHo-3Sm-0.5Zr(x=6, 8, 10, 12,质量分数，%)合金的显微组织与力学性能。结果表明：铸态Mg-xHo-3Sm-0.5Zr合金组织主要由α-Mg、Mg41Sm5以及Mg24Ho5相组成。随着Ho含量的增加，合金的晶粒逐渐细化，第二相含量略有增加，当Ho含量达到8%时，合金组织最均匀，综合力学性能最好，其抗拉强度、屈服强度和伸长率分别为174 MPa、113 MPa和8.37%。
Abstract：Microstructure and mechanical properties of as-cast Mg-xHo-3 Sm-0.5 Zr(x=6, 8, 10, 12, mass fraction, %) alloys were studied by means of optical microscope, scanning electron microscopy, X-ray diffractometer, energy dispersive spectrometer analysis and tensile property test. The results show that the microstructure of the as-cast Mg-xHo-3 Sm-0.5 Zr alloys is mainly composed of α-Mg, Mg41Sm5 and Mg24Ho5 phases. With the increase of Ho content, the grain of the alloy is gradually refined and the content of the second phase increases slightly. When the Ho content reaches 8%, the alloy has the most uniform microstructure and the best comprehensive mechanical properties, and its tensile strength, yield strength and elongation are 174 MPa, 113 MPa and 8.37%, respectively.
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基本信息:
DOI：10.13289/j.issn.1009-6264.2021-0498
中图分类号:TG146.22
引用信息:
[1]冷航,李全安,陈晓亚等.铸态Mg-xHo-3Sm-0.5Zr合金的显微组织与力学性能[J],2022,43(04):44-50.DOI:10.13289/j.issn.1009-6264.2021-0498.
基金信息:
国家自然科学基金(51571084)