Lightweight Ultra‐Strength in AlFeNiTiV Complex Concentrated Alloys via Cu Microalloying‐Driven Lattice Coherency Tuning

Next-generation high-performance structural materials are required for lightweight design strategies and advanced energy applications. In this work, a custom AlFeNiTiV complex concentrated alloy (CCA) with a combination of ultra-high compressive strength, over 3.3 GPa, and lightweight, 6.83 g cm<sup>-3</sup>, is developed via Cu microalloying-driven lattice coherency tuning. The strengthening of the CCA is based on minimal lattice mismatch to achieve maximum coherency strengthening. Maximum precipitation dispersion and alleviating stress concentration at the interface allow the alloy to maintain a macro compressive strain of 11.8%. Meanwhile, it can still maintain excellent yield strength at 600 °C for the low lattice misfit, extremely stable L2<sub>1</sub> structure, achieving 1311.6 MPa. These findings provide insights into developing lightweight, high-temperature CCAs through a phase interface modulation strategy.

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Publication Details

Journal
Advanced Science
Published
2025-11-08
DOI
https://doi.org/10.1002/advs.202514708
Primary Topic
High Entropy Alloys Studies
Type
article
Field-Weighted Citation Impact
0.00

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article

Lightweight Ultra‐Strength in AlFeNiTiV Complex Concentrated Alloys via Cu Microalloying‐Driven Lattice Coherency Tuning

Ning Ding, Chaoran Wang, Zeyun Cai, Weizong Bao et al.
Advanced Science
High Entropy Alloys Studies
article

Lightweight Ultra‐Strength in AlFeNiTiV Complex Concentrated Alloys via Cu Microalloying‐Driven Lattice Coherency Tuning

Ning Ding, Chaoran Wang, Zeyun Cai, Weizong Bao, Jiayin Chen, Guoqiang Xie, Jie Chen, Hongmei Chen, Xin Yang, Bohua Yu, Tao Hong
article en

Abstract

Next-generation high-performance structural materials are required for lightweight design strategies and advanced energy applications. In this work, a custom AlFeNiTiV complex concentrated alloy (CCA) with a combination of ultra-high compressive strength, over 3.3 GPa, and lightweight, 6.83 g cm<sup>-3</sup>, is developed via Cu microalloying-driven lattice coherency tuning. The strengthening of the CCA is based on minimal lattice mismatch to achieve maximum coherency strengthening. Maximum precipitation dispersion and alleviating stress concentration at the interface allow the alloy to maintain a macro compressive strain of 11.8%. Meanwhile, it can still maintain excellent yield strength at 600 °C for the low lattice misfit, extremely stable L2<sub>1</sub> structure, achieving 1311.6 MPa. These findings provide insights into developing lightweight, high-temperature CCAs through a phase interface modulation strategy.

Advanced ScienceVol. 13(6)
Shenzhen Institute of Information Technology (CN), Harbin Institute of Technology (CN), Southern University of Science and Technology (CN), Shenzhen Research Institute of Big Data (CN), Shenzhen Technology University (CN)
National Natural Science Foundation of China, Basic and Applied Basic Research Foundation of Guangdong Province
Openalex Percentile: Top 65%
High Entropy Alloys Studies
DOIOpen Access PDFOpenAlex
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