Microstructure and mechanical properties of a novel lightweight eutectic high-entropy alloy

IF 4.8 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics Pub Date : 2025-07-19 DOI:10.1016/j.intermet.2025.108925

Dongdong Xia , Xicong Ye , Jiankun Yang , Huijun Kang , Li Sun , Guoxin Wu , Jiajia Guo , Yiren Rong , Fanghui Zhu

引用次数: 0

Abstract

A design concept for lightweight, ultra-strong, and thermally stable eutectic high-entropy alloy with low-mismatch coherent or semi-coherent interfaces and high interfacial binding energies, consisting of L2₁ and BCC phases, has been proposed. Based on this concept, we increased the content of low-cost, low-density Al/Ti elements in the alloy composition and reduced the expensive V content, resulting in the design of Al₂₅Ni₃₀Ti₂₀V₂₅ eutectic high-entropy alloy. These alloys exhibit a significantly lower density of 5.312 g/cm³ and good room-temperature compressive mechanical properties (yield strength of 1625.24 ± 49.07 MPa, fracture strength of 2332.76 ± 54.58 MPa, and compressive strain of 18.25 ± 0.32 %). Additionally, they exhibit a significant advantage in specific yield strength (306 MPa cm³/g).

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一种新型轻质共晶高熵合金的组织与力学性能

提出了一种由L21相和BCC相组成、具有低失配相干或半相干界面和高界面结合能的轻质、超强、热稳定共晶高熵合金的设计概念。基于这一理念，我们增加了合金成分中低成本、低密度Al/Ti元素的含量，降低了昂贵的V含量，从而设计出了Al25Ni30Ti20V25共晶高熵合金。合金的密度为5.312 g/cm3，具有良好的室温抗压力学性能（屈服强度为1625.24±49.07 MPa，断裂强度为2332.76±54.58 MPa，压缩应变为18.25±0.32%）。此外，它们在比屈服强度（306 MPa cm3/g）方面具有显著优势。

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

Intermetallics 工程技术-材料科学：综合

CiteScore

7.80

自引率

9.10%

发文量

291

审稿时长

37 days

期刊介绍： This journal is a platform for publishing innovative research and overviews for advancing our understanding of the structure, property, and functionality of complex metallic alloys, including intermetallics, metallic glasses, and high entropy alloys. The journal reports the science and engineering of metallic materials in the following aspects: Theories and experiments which address the relationship between property and structure in all length scales. Physical modeling and numerical simulations which provide a comprehensive understanding of experimental observations. Stimulated methodologies to characterize the structure and chemistry of materials that correlate the properties. Technological applications resulting from the understanding of property-structure relationship in materials. Novel and cutting-edge results warranting rapid communication. The journal also publishes special issues on selected topics and overviews by invitation only.