摘要
用非自耗真空电弧炉制备了Ni_(25)Co_(25)Cr_(20)Fe_(10)Re_(16.5)Mo_(3.5)高熵合金,通过相图计算确定了热处理制度,研究了不同热处理对合金组织及力学性能的影响。结果表明,该合金铸态下为FCC枝晶组织,枝晶干上有大量树枝状的σ相析出。1380℃/24h固溶处理后,基体枝晶组织完全消失,转变为均匀的FCC结构,树枝状的σ相转变为大块状。1100℃/24h时效处理后,大量薄片层的σ相在基体中呈胞状析出。相比于铸态合金,时效合金的屈服强度和抗拉强度大大提高,且仍保持一定的塑性。
In this work,Ni_(25)Co_(25)Cr_(20)Fe_(10)Re_(16.5)Mo_(3.5) high-entropy alloy was prepared in a non-consumable vacuum arc furnace.The treatment process was determined by phase diagram calculation,and the effects of different heat treatments on the microstructure and mechanical properties of the alloy were studied.The results indicate that the alloy exhibits FCC dendrite structure as cast,and a large number of dendritic structures σ phase are generated on the dendrite core.After solid solution treatment at 1380 ℃/24h,the matrix dendrite structure completely disappears and transforms into a uniform FCC structure.Additionally,the morphology of the σ phase changes from dendritic to blocky.After aging treatment at 1100 ℃/24h,massive thin layers σ phase precipitates in a cellular form the matrix.Compared to as cast alloys,the yield strength and tensile strength of aged alloys are greatly improved,while still maintaining a certain degree of plasticity.
作者
杨永福
马怀立
桑杰才让
石玉成
赵永军
YANG Yong-fu;MA Huai-i;SANGJIE Cai-rang;SHI Yu-cheng;ZHAO Yong-jun(Ningxia Yellow River Hydropower Qingtongxia Power Generation Co.,Ltd.,Qingtongxia 751600,China;Research Institute of Product Quality Standards of the Ministry of Water Resources,Hangzhou 310000,China)
出处
《世界有色金属》
2023年第13期196-198,共3页
World Nonferrous Metals
基金
黄河公司《青铜峡水电站多泥沙河流轴流转桨式水轮机抗空蚀磨损防护技术研究》科研项目支持。
关键词
高熵合金
热处理
微观组织
力学性能
high-entropy alloy
heat treatment
microstructure
mechanical property
