Tailoring L21 strengthening in lightweight AlFeNiTiV complex concentrated alloys for elevated-temperature applications

IF 9.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Rare Metals Pub Date : 2025-03-07 DOI:10.1007/s12598-025-03241-x

Hong-Mei Chen, Ze-Yun Cai, Jie Chen, Jun-Zhi Li, Tao Hong, Wei-Zong Bao, Guo-Qiang Xie

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引用次数: 0

Abstract

Complex concentrated alloys (CCAs) containing the L2₁ phase are recognized for their exceptional strength and thermal stability, positioning them as strong candidates for transformative applications in aerospace, energy, and structural sectors. This investigation delves into the AlFe_xNiTiV_40−x (x = 0, 10, 20, 30, 35, 40; at%) CCAs, aiming to unlock the synergistic potential of BCC and L2₁ phases. By conducting an in-depth analysis of microstructure, phase behavior, and mechanical properties, the intricate relationships between chemistry, structure, and properties are illuminated within this alloy system. The Al₁₅Fe₃₅Ni₃₀Ti₁₅V₅ alloy demonstrates remarkable mechanical properties, achieving a yield strength of 2140.9 MPa and ultimate compressive strength of 2699.7 MPa, primarily through solid solution strengthening and precipitation hardening. Notably, its low lattice mismatches and nanoprecipitate strengthening yield an impressive specific yield strength at 600 °C (245.2 MPa(g·cm⁻³)⁻¹). Phase modulation achieves the synergistic optimization of specific strengths at both room and high temperatures in CCAs containing the L2₁ phase, opening new avenues for designing advanced lightweight and high strength alloys for elevated-temperature applications.

Graphical abstract

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定制用于高温应用的轻质AlFeNiTiV复杂浓缩合金的L21强化

含有L21相的复杂浓缩合金（CCAs）因其卓越的强度和热稳定性而得到认可，使其成为航空航天、能源和结构领域变革应用的有力候选者。本研究深入研究了AlFexNiTiV40−x (x = 0,10,20,30,35,40；（%） CCAs，旨在释放BCC和L21相的协同潜力。通过对合金微观结构、相行为和力学性能的深入分析，揭示了该合金体系中化学、结构和性能之间的复杂关系。Al15Fe35Ni30Ti15V5合金表现出优异的力学性能，屈服强度为2140.9 MPa，极限抗压强度为2699.7 MPa，主要通过固溶强化和沉淀硬化。值得注意的是，它的低晶格错配和纳米沉淀强化在600°C （245.2 MPa(g·cm−3)−1）时产生了令人印象深刻的比屈服强度。相位调制在室温和高温下实现了含有L21相的cca的比强度的协同优化，为设计用于高温应用的先进轻质高强度合金开辟了新的途径。图形抽象

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Rare Metals 工程技术-材料科学：综合

CiteScore

12.10

自引率

12.50%

发文量

2919

审稿时长

2.7 months

期刊介绍： Rare Metals is a monthly peer-reviewed journal published by the Nonferrous Metals Society of China. It serves as a platform for engineers and scientists to communicate and disseminate original research articles in the field of rare metals. The journal focuses on a wide range of topics including metallurgy, processing, and determination of rare metals. Additionally, it showcases the application of rare metals in advanced materials such as superconductors, semiconductors, composites, and ceramics.