均匀化处理对Fe基中熵合金组织及力学性能影响

兰州理工大学学报 ›› 2023, Vol. 49 ›› Issue (1): 1-6.

• 材料科学与工程 • 下一篇

均匀化处理对Fe基中熵合金组织及力学性能影响

赵燕春^*, 师自强, 张林浩, 张敏亚, 寇生中

兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室, 甘肃兰州 730050

收稿日期:2022-02-28 出版日期:2023-02-28 发布日期:2023-03-21
通讯作者: 赵燕春(1984-),女,山东菏泽人,博士,教授. Email:yanchun_zhao@163.com
基金资助:
国家自然科学基金(52061027),甘肃省科技计划(22CX8GA109,22YF7GA155)

Effect of homogenization treatment on the microstructure and mechanical properties of Fe-based medium entropy alloys

ZHAO Yan-chun, SHI Zi-qiang, ZHANG Lin-hao, ZHANG Min-ya, KOU Sheng-zhong

State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou Univ. of Tech., Lanzhou 730050, China

Received:2022-02-28 Online:2023-02-28 Published:2023-03-21

摘要/Abstract

摘要： 采用水冷铜坩埚磁悬浮熔炼-铜模负压吸铸法制备了(Fe_63.3Mn₁₄Si_9.1Cr_9.8C_3.8)_98.5Y_1.5(Y=Cu、Ag)、(Fe_63.3Mn₁₄Si_9.1Cr_9.8C_3.8)₉₇Cu_1.5Ag_1.5中熵合金. 通过建立均匀化动力学方程,研究了均匀化温度和时间对力学性能的影响.对(Fe_63.3Mn₁₄Si_9.1Cr_9.8C_3.8)_98.5Y_1.5(Y=Cu、Ag)、(Fe_63.3Mn₁₄Si_9.1Cr_9.8C_3.8)₉₇Cu_1.5Ag_1.5中熵合金分别在873、973、1 073、1 173、1 273 K进行6 h均匀化处理,研究其组织结构和压缩性能的关系.结果表明:通过施加均匀化处理使合金元素均匀分布、偏析显著减少,1 173 K均匀化处理后合金具有好的相稳定性,仍为fcc结构.在1 173 K时,(Fe_63.3Mn₁₄Si_9.1Cr_9.8C_3.8)₉₇Cu_1.5Ag_1.5中熵合金的压缩力学性能最优,其抗压强度及塑性应变分别为3 992.4 MPa和35.75%,且实验结果与均匀化扩散动力学方程计算预测相符.

关键词: 中熵合金, 均匀化处理, 扩散动力学, 微观结构, 力学性能

Abstract: The (Fe_63.3Mn₁₄Si_9.1Cr_9.8C_3.8)_98.5Y_1.5(Y=Cu、Ag)、(Fe_63.3Mn₁₄Si_9.1Cr_9.8C_3.8)₉₇Cu_1.5Ag_1.5 were prepared by water-cooled copper crucible magnetic levitation melting-copper mold negative pressure suction casting method.The effect of homogenization temperature and time on mechanical properties was studied by establishing the uniformization kinetic equation.(Fe_63.3Mn₁₄Si_9.1Cr_9.8C_3.8)_98.5Y_1.5(Y=Cu、Ag) and (Fe_63.3Mn₁₄Si_9.1Cr_9.8C_3.8)₉₇Cu_1.5Ag_1.5 medium entropy alloys were homogenized at 873, 973, 1 073, 1 173, 1 273 K, respectively. The relationshipwas investigatedbetween its organizational structure and compression performance. The results showed that the uniform distribution of alloying elements is applied and the segregation is significantly reduced, The homogenization alloy is phase stable and still has an fcc structure at 1 173 K, and the compressive mechanical properties of the entropy alloy of (Fe_63.3Mn₁₄Si_9.1Cr_9.8C_3.8)₉₇Cu_1.5Ag_1.5 is the best at 1 173 K, and the compressive strength and plastic strain were 3 992.4 MPa and 35.75%, respectively, and the experimental results were consistent with the calculational prediction of the equation of homogenization diffusion kinetics.

Key words: MEAs, homogenization, diffusion kinetics, microstructure, mechanical properties

中图分类号:

TG139.8

赵燕春, 师自强, 张林浩, 张敏亚, 寇生中. 均匀化处理对Fe基中熵合金组织及力学性能影响[J]. 兰州理工大学学报, 2023, 49(1): 1-6.

ZHAO Yan-chun, SHI Zi-qiang, ZHANG Lin-hao, ZHANG Min-ya, KOU Sheng-zhong. Effect of homogenization treatment on the microstructure and mechanical properties of Fe-based medium entropy alloys[J]. Journal of Lanzhou University of Technology, 2023, 49(1): 1-6.

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均匀化处理对Fe基中熵合金组织及力学性能影响

Effect of homogenization treatment on the microstructure and mechanical properties of Fe-based medium entropy alloys

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