Microstructure and Mechanical Properties of the Ti62Nb12Mo12Ta12W2 Refractory High Entropy Alloy Prepared through Spark Plasma Sintering

IF 2.9 2区 材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING
Zirui Chen, Liyuan Wang, Jiayu Zhao, Guanhua Cui, Zhuo Gao, Zhiyuan Fan, Xiaohui Shi, Junwei Qiao
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引用次数: 0

Abstract

A refractory high entropy alloy Ti62Nb12Mo12Ta12W2 was prepared by mechanical alloying and spark plasma sintering. The microstructure and mechanical properties of the Ti62Nb12Mo12Ta12W2 alloy were analyzed. The experimental results show that the microstructure of the alloy is composed of two BCC phases, an FCC precipitated phase, and the precipitated phase which is a mixture of TiC, TiN and TiO. The alloy exhibits good room temperature compressive properties. The plasticity of the sample sintered at 1550 °C can reach 10.8%, and for the sample sintered at 1600 °C, the yield strength can be up to 2032 MPa, in the meantime the plasticity is 9.4%. The alloy also shows high strength at elevated temperature. The yield strength of the alloy exceeds 420 MPa at 900 °C, and value of which is still above 200 MPa when the test temperature reaches 1000 °C. Finally, the compressive yield strength model at room temperature is constructed. The prediction error of the model ranges from − 7.9% to − 12.4%, expressing fair performance.

通过火花等离子烧结制备的 Ti62Nb12Mo12Ta12W2 难熔高熵合金的显微组织和力学性能
通过机械合金化和火花等离子烧结制备了难熔高熵合金 Ti62Nb12Mo12Ta12W2。分析了 Ti62Nb12Mo12Ta12W2 合金的微观结构和力学性能。实验结果表明,合金的微观结构由两个 BCC 相、一个 FCC 沉淀相以及由 TiC、TiN 和 TiO 混合组成的沉淀相构成。该合金具有良好的室温抗压性能。在 1550 °C 下烧结的样品塑性可达 10.8%,而在 1600 °C 下烧结的样品屈服强度可达 2032 兆帕,同时塑性为 9.4%。该合金在高温下也表现出很高的强度。合金在 900 ℃ 时的屈服强度超过 420 兆帕,当测试温度达到 1000 ℃ 时,屈服强度值仍在 200 兆帕以上。最后,构建了室温下的压缩屈服强度模型。模型的预测误差在 - 7.9% 到 - 12.4% 之间,性能尚可。
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来源期刊
Acta Metallurgica Sinica-English Letters
Acta Metallurgica Sinica-English Letters METALLURGY & METALLURGICAL ENGINEERING-
CiteScore
6.60
自引率
14.30%
发文量
122
审稿时长
2 months
期刊介绍: This international journal presents compact reports of significant, original and timely research reflecting progress in metallurgy, materials science and engineering, including materials physics, physical metallurgy, and process metallurgy.
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