Al含量对热轧FeMnCoCr系高熵合金组织和性能的影响

doi:10.13251/j.issn.0254-6051.2022.05.007

金属热处理 ›› 2022, Vol. 47 ›› Issue (5): 47-52.DOI: 10.13251/j.issn.0254-6051.2022.05.007

Al含量对热轧FeMnCoCr系高熵合金组织和性能的影响

赵思杰, 李航, 牛利冲, 李杰, 冯运莉

华北理工大学冶金与能源学院, 河北唐山 063210

收稿日期:2021-12-28 修回日期:2022-03-22 出版日期:2022-05-25 发布日期:2022-06-16
通讯作者: 李杰,副教授,博士,E-mail: lijiemain@163.com
作者简介:赵思杰(1996—),女,硕士研究生,主要研究方向为新型金属材料,E-mail: zhaosijie1012@163.com。
基金资助:
国家自然科学基金(51974134);河北省科技重大专项项目(21281008Z);唐山市应用基础研究项目(21130237C,21130218C)

Effect of Al content on microstructure and properties of hot rolled FeMnCoCr high entropy alloy

Zhao Sijie, Li Hang, Niu Lichong, Li Jie, Feng Yunli

College of Metallurgy and Energy, North China University of Science and Technology, Tangshan Hebei 063210, China

Received:2021-12-28 Revised:2022-03-22 Online:2022-05-25 Published:2022-06-16

摘要/Abstract

摘要： 研究了Al含量对(Fe₅₀Mn₃₀Co₁₀Cr₁₀)_100-xAl_x高熵合金微观组织、变形机制和拉伸性能的影响。采用真空电弧熔炼炉制备合金铸锭,对合金进行压下率为80%的热轧火淬,利用SEM和EBSD对合金的组织结构进行了分析。结果表明,随着Al含量(原子分数,下同)由0%增加到6%,热轧淬火后合金组织由FCC+HCP双相转变成FCC单相,Al含量为8%时产生了BCC相;随着Al含量由0%增加到6%,在拉伸过程中TRIP效应受到抑制,TWIP效应明显增加,合金的屈服强度变化不大,抗拉强度稍有降低,断后伸长率显著增加,当Al含量为6%时断后伸长率达到最高,为79%。

关键词: FeMnCoCr系高熵合金, Al含量, 微观组织, TRIP效应, TWIP效应, 拉伸性能

Abstract: Effect of Al content on microstructure, deformation mechanism and tensile properties of the (Fe₅₀Mn₃₀Co₁₀Cr₁₀)_100-xAl_x high entropy alloys was studied. The (Fe₅₀Mn₃₀Co₁₀Cr₁₀)_100-xAl_x cast alloys were melted by a vacuum electric arc furnace, and then hot rolled and water quenched with a reduction rate of 80%. The microstructure of the alloy was analyzed by using SEM and EBSD. The results show that with the increase of Al content (atom fraction, the same below) from 0% to 6%, the microstructure of the hot rolled and quenched alloy changes from FCC+HCP dual phase to FCC single phase, and BCC phase occurs when Al content is 8%. With the increase of Al content from 0% to 6%, the TRIP effect is inhibited, but the TWIP effect enhances obviously, the yield strength of the alloy changes a little, the tensile strength decreases slightly, while the elongation after fracture increases significantly. When the Al content is 6%, the elongation of the high entropy alloy reaches the highest, which is 79%.

Key words: FeMnCoCr high entropy alloy, Al content, microstructure, TRIP effect, TWIP effect, tensile properties

中图分类号:

TG139

赵思杰, 李航, 牛利冲, 李杰, 冯运莉. Al含量对热轧FeMnCoCr系高熵合金组织和性能的影响[J]. 金属热处理, 2022, 47(5): 47-52.

Zhao Sijie, Li Hang, Niu Lichong, Li Jie, Feng Yunli. Effect of Al content on microstructure and properties of hot rolled FeMnCoCr high entropy alloy[J]. Heat Treatment of Metals, 2022, 47(5): 47-52.

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Al含量对热轧FeMnCoCr系高熵合金组织和性能的影响

Effect of Al content on microstructure and properties of hot rolled FeMnCoCr high entropy alloy

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