退火温度对CrFeCoNiTi1.5高熵合金微结构与性能的影响

doi:10.13251/j.issn.0254-6051.2020.03.021

金属热处理 ›› 2020, Vol. 45 ›› Issue (3): 108-113.DOI: 10.13251/j.issn.0254-6051.2020.03.021

退火温度对CrFeCoNiTi_1.5高熵合金微结构与性能的影响

姜越, 周广泰, 程思梦, 李秀明

哈尔滨理工大学理学院, 黑龙江哈尔滨 150080

收稿日期:2019-09-20 出版日期:2020-03-25 发布日期:2020-04-03
作者简介:姜越(1963—),男,教授,博士研究生,主要从事特种合金的热处理应用研究,E-mail:yjiang@hrbust.edu.cn。

Effect of annealing temperature on microstructure and properties of CrFeCoNiTi_1.5 high entropy alloy

Jiang Yue, Zhou Guangtai, Cheng Simeng, Li Xiuming

School of Science, Harbin University of Science and Technology, Harbin Heilongjiang 150080, China

Received:2019-09-20 Online:2020-03-25 Published:2020-04-03

摘要/Abstract

摘要：

为研究中低温热处理对CrFeCoNiTi_1.5高熵合金性能的影响,分别在200、400及600 ℃下对高熵合金进行10 h退火处理。通过X射线衍射仪、扫描电镜(SEM)、能谱仪(EDS)、显微硬度计和电化学工作站对高熵合金的组织结构、表面形貌以及元素的偏析程度进行分析,并测试了高熵合金的动电位极化曲线以及维氏硬度。结果表明:退火温度的提高有利于CrFeCoNiTi_1.5高熵合金中HCP结构相的析出;随着温度的升高Cr、Fe、Co和Ni逐渐向晶内聚集分布,Ti逐渐向晶间聚集。600 ℃中低温退火处理时合金耐腐蚀性能最好,硬度为914 HV0.5。

关键词: CrFeCoNiTi_1.5高熵合金, 退火处理, 微结构, 维氏硬度, 耐腐蚀性

Abstract:

In order to study the effect of medium and low temperature heat treatment on properties of CrFeCoNiTi_1.5 high entropy alloy, the high entropy alloy was annealed at 200, 400 and 600 ℃ for 10 h, respectively. The microstructure, surface morphology and segregation of the elements were analyzed by X-ray diffraction, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS). Simultaneously, the dynamic potential polarization curves and Vickers hardness of the high entropy alloy were also tested by microhardness tester and electrochemical workstation. The results show that the increase of annealing temperature is favorable to the precipitation of HCP structure phase of the CrFeCoNiTi_1.5 high entropy alloy. With the increase of temperature, Cr, Fe, Co and Ni gradually aggregate into and distribute inside the grains, while Ti gradually aggregates to the intergranular region. When annealed at 600 ℃, the corrosion resistance of the CrFeCoNiTi_1.5 high entropy alloy reaches the optimal value, and the Vickers hardness is 914 HV0.5.

Key words: CrFeCoNiTi_1.5 high entropy alloy, annealing, microstructure, Vickers hardness, corrosion resistance

中图分类号:

TG156.2

姜越, 周广泰, 程思梦, 李秀明. 退火温度对CrFeCoNiTi_1.5高熵合金微结构与性能的影响[J]. 金属热处理, 2020, 45(3): 108-113.

Jiang Yue, Zhou Guangtai, Cheng Simeng, Li Xiuming. Effect of annealing temperature on microstructure and properties of CrFeCoNiTi_1.5 high entropy alloy[J]. HTM, 2020, 45(3): 108-113.

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退火温度对CrFeCoNiTi_1.5高熵合金微结构与性能的影响

Effect of annealing temperature on microstructure and properties of CrFeCoNiTi_1.5 high entropy alloy

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退火温度对CrFeCoNiTi1.5高熵合金微结构与性能的影响

Effect of annealing temperature on microstructure and properties of CrFeCoNiTi1.5 high entropy alloy

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退火温度对CrFeCoNiTi_1.5高熵合金微结构与性能的影响

Effect of annealing temperature on microstructure and properties of CrFeCoNiTi_1.5 high entropy alloy