As-cast Tix(AlVCr)100−x light-weight medium entropy alloys with high strength and uniform compressive plasticity

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

Transactions of Nonferrous Metals Society of China Pub Date : 2025-01-01 DOI:10.1016/S1003-6326(24)66674-4

Ming-jie KAI , Yu-jie MA , Xiao-tian WANG , Liang CHENG , Jian-bo HU , Yao-yao HU , Tai-ran XU , Gui-jiang LI , Xiang-kang MENG , Zhen-hua CAO

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引用次数: 0

Abstract

The effect of Ti content on the microstructure and mechanical properties of as-cast light-weight Ti_x(AlVCr)_100−x medium entropy alloys was studied by compressive tests, X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The results suggest that yield strength increases and then decreases with the increment of Ti content. The Ti₆₀(AlVCr)₄₀ alloy has the best combination of high strength of 1204 MPa and uniform plastic strain of 70%, possessing a high specific yield strength of 255 MPa·cm³/g. The enhancement of strength is mainly attributed to the synergic effects of solid-solution and coherent nano-precipitation strengthening, while dislocation motion such as dislocation pinning, entanglement and dislocation cells significantly increases the strain-hardening capacity.

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铸态Tix(AlVCr)100−x轻质中熵合金，具有高强度和均匀的压缩塑性

采用压缩试验、x射线衍射、扫描电镜和透射电镜研究了Ti含量对轻量化Tix(AlVCr)100−x中熵合金铸态组织和力学性能的影响。结果表明，随Ti含量的增加，屈服强度先增大后减小。Ti60(AlVCr)40合金具有1204 MPa的高强度和70%均匀塑性应变的最佳组合，具有255 MPa·cm3/g的高比屈服强度。强度的增强主要是固溶和相干纳米析出强化的协同作用，而位错钉住、缠结和位错胞等位错运动显著提高了应变硬化能力。

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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.