B含量对CrFeCoNiTi<sub>0.6</sub>高熵合金显微组织和性能的影响

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摘要高熵合金是一种新型的固溶强化金属材料,具有良好的力学性能。本文采用机械合金化和放电等离子烧结的方法制备CrFeCoNiTi_0.6B_x(x=0,0.025,0.050,0.075,0.100,0.125)高熵合金。通过X射线衍射分析,扫描电镜观察和能谱分析以及维氏硬度测试和压缩强度测试等,研究B含量对CrFeCoNiTi_0.6系高熵合金的微观组织和性能的影响。结果表明,CrFeCoNiTi_0.6B高熵合金由FCC结构和简单四方晶系相构成,同时包含硼化物,当x=0.125时,合金由FCC结构转变为FCC+BCC结构。由于B元素的加入,合金综合力学性能显著提高。当x=0.1时,合金同时具有最高的硬度和压缩强度,分别为207.3HV和813.9MPa.

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	姜越
	李秀明
	周广泰
	朱柏祥

关键词 ：高熵合金, 硼, 微观组织, 维氏硬度, 压缩强度

Abstract：High entropy alloy is a new kind of solid solution reinforced metal material with good mechanical properties. CrFeCoNiTi_0.6B_x(x=0, 0.025, 0.050, 0.075, 0.100, 0.125) high entropy alloy was successfully prepared by mechanical alloying and spark plasma sintering. The microstructure of the high-entropy alloy was analyzed by X-ray diffraction analysis, scanning electron microscope observation and energy spectrum analysis. The properties of the high-entropy alloy were analyzed by Vickers hardness test and compression strength test. The effects of B content on the microstructure and properties of CrFeCoNiTi_0.6 series high-entropy alloy were also investigated. The results show that CrFeCoNiTi_0.6B high-entropy alloy is composed of FCC structure, simple tetragonal system and boride. When x is 0.125, the alloy structure changes from FCC structure to FCC+BCC structure. The mechanical properties of the alloy are significantly improved because of the addition of B. When x is 0.1, the alloy has the highest hardness of 207.3 HV and compressive strength of 813.9 MPa.

Key words： high-entropy alloy boron microstructure vickers hardness compressive strength

收稿日期: 2020-05-01 出版日期: 2021-01-18

ZTFLH:

TG113

基金资助:国家自然科学基金青年项目(51807042)

通讯作者: 姜越,教授,博士。电话：13114511002;E-mail: yjiang@hrbust.edu.cn

引用本文:

姜越, 李秀明, 周广泰, 朱柏祥. B含量对CrFeCoNiTi_0.6高熵合金显微组织和性能的影响[J]. 粉末冶金材料科学与工程, 2020, 25(5): 403-409.
JIANG Yue, LI Xiuming, ZHOU Guangtai, ZHU Baixiang. Effects of B content on microstructure and properties of CrFeCoNiTi_0.6 high-entropy alloy. Materials Science and Engineering of Powder Metallurgy, 2020, 25(5): 403-409.

链接本文:

http://pmbjb.csu.edu.cn/CN/ 或 http://pmbjb.csu.edu.cn/CN/Y2020/V25/I5/403

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