Effect of rhenium addition on microstructure and mechanical properties of Ti−48Al−2Cr−2Nb alloys

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China Pub Date : 2025-02-01 DOI:10.1016/S1003-6326(24)66693-8

Sheng-hang XU , Jun-jie LAN , Meng HAN , Hui-bin ZHANG , Kai-jie SHEN , Jun-pin LIN , Hua-zhen CAO , Guo-qu ZHENG

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Abstract

The refractory metal rhenium (Re), with content of 0−2 at.%, was introduced into a typical γ-TiAl alloy of Ti−48Al−2Cr−2Nb (at.%) through vacuum arc melting. The effect of Re content on the microstructure and mechanical properties of the γ-TiAl alloy was investigated. The results show that the γ-TiAl−xRe alloy is composed of γ, α₂, and β phases. As the Re content increases, the proportion of β phase increases, while the content and size of α₂+γ lamellar structure decrease gradually. Furthermore, the compressive strength increases with increasing Re content. A maximum compressive strength of 2282 MPa is achieved for the γ-TiAl−2Re alloy. The γ-TiAl−2Re alloy exhibits a fracture strain of 36.7%, considerably higher than that of the γ-TiAl alloy (31.0%). Moreover, compared with the γ-TiAl alloy, the hardness and compressive strength of the γ-TiAl−2Re alloy considerably increase by 17.5% and 34.2%, respectively.

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通过真空电弧熔炼，在典型的 Ti-48Al-2Cr-2Nb (at.%) γ-TiAl 合金中引入了难熔金属铼 (Re)，含量为 0-2 at.%。研究了 Re 含量对 γ-TiAl 合金微观结构和机械性能的影响。结果表明，γ-TiAl-xRe 合金由 γ、α2 和 β 三相组成。随着 Re 含量的增加，β 相的比例增加，而 α2+γ 层状结构的含量和尺寸逐渐减小。此外，抗压强度随着 Re 含量的增加而增加。γ-TiAl-2Re合金的最大抗压强度达到了2282兆帕。γ-TiAl-2Re合金的断裂应变为36.7%，大大高于γ-TiAl合金的断裂应变（31.0%）。此外，与 γ-TiAl 合金相比，γ-TiAl-2Re 合金的硬度和抗压强度分别大幅提高了 17.5% 和 34.2%。

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来源期刊

Transactions of Nonferrous Metals Society of China 工程技术-冶金工程

CiteScore

7.40

自引率

17.80%

发文量

8456

审稿时长

3.6 months

期刊介绍： The Transactions of Nonferrous Metals Society of China (Trans. Nonferrous Met. Soc. China), founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, INSPEC, CA, METADEX, AJ and JICST.