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_(63.3)Mn_(14)Si_(9.1)Cr_(9.8)C_(3.8))_(98.5)Y_(1.5)(Y=Cu、Ag)、(Fe_(63.3)Mn_(14)Si_(9.1)Cr_(9.8)C_(3.8))_(97)Cu_(1.5)Ag_(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_(63.3)Mn_(14)Si_(9.1)Cr_(9.8)C_(3.8))_(98.5)Y_(1.5)(Y=Cu、Ag)、(Fe_(63.3)Mn_(14)Si_(9.1)Cr_(9.8)C_(3.8))_(97)Cu_(1.5)Ag_(1.5)中熵合金分别在873、973、1073、1173、1273 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,1173 K均匀化处理后合金具有好的相稳定性,仍为fcc结构.在1173 K时,(Fe_(63.3)Mn_(14)Si_(9.1)Cr_(9.8)C_(3.8))_(97)Cu_(1.5)Ag_(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3992.4 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.
The(Fe_(63.3)Mn_(14)Si_(9.1)Cr_(9.8)C_(3.8))_(98.5)Y_(1.5)(Y=Cu、Ag)、(Fe_(63.3)Mn_(14)Si_(9.1)Cr_(9.8)C_(3.8))_(97)Cu_(1.5)Ag_(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_(63.3)Mn_(14)Si_(9.1)Cr_(9.8)C_(3.8))_(98.5)Y_(1.5)(Y=Cu、Ag)and(Fe_(63.3)Mn_(14)Si_(9.1)Cr_(9.8)C_(3.8))_(97)Cu_(1.5)Ag_(1.5)medium entropy alloys were homogenized at 873,973,1073,1173,1273 K,respectively.The relationship was investigated between 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 1173 K,and the compressive mechanical properties of the entropy alloy of(Fe_(63.3)Mn_(14)Si_(9.1)Cr_(9.8)C_(3.8))_(97)Cu_(1.5)Ag_(1.5)is the best at 1173 K,and the compressive strength and plastic strain were 3992.4 MPa and 35.75%,respectively,and the experimental results were consistent with the calculational prediction of the equation of homogenization diffusion kinetics.
作者
赵燕春
师自强
张林浩
张敏亚
寇生中
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)
出处
《兰州理工大学学报》
CAS
北大核心
2023年第1期1-6,共6页
Journal of Lanzhou University of Technology
基金
国家自然科学基金(52061027)
甘肃省科技计划(22CX8GA109,22YF7GA155)。
