Impact of atomic size misfit on lattice distortion in AlFeCoNiX (X = Cr/Mn/Zr) multicomponent alloys

IF 3.5 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Science Pub Date : 2025-02-17 DOI:10.1007/s10853-025-10681-4

Prince Wesley Vanaraj, Lokeswaran Ravi, Shashikant P. Patole, Dalaver H. Anjum, S. N. Megha, Mangalampalli S. R. N. Kiran, Suresh Perumal, Ravikirana

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引用次数: 0

Abstract

This study investigates the complex interplay among composition, microstructure, and hardness within the high-entropy alloy (HEA), AlFeCoNiX (X-Cr/Mn/Zr). Utilizing the vacuum arc melting process, compositionally graded alloys were fabricated and characterized in their as-cast condition. Microstructural analysis unveiled a complex blend of phases, including BCC, B2, FCC, and C15 (Laves) with the addition of Cr, Mn, and Zr to the quaternary AlFeCoNi HEA. Particularly noteworthy was the dominant Al-Ni-rich phase. The B2 chemical ordering within the Al-Ni-rich phase decreased significantly from 63.5% in AlFeCoNi to 4.5%, 28.8%, and 51% with the addition of Cr, Mn, and Zr, respectively. Furthermore, lattice distortion variations, determined by the atomic size difference parameter δ[%], for AlFeCoNiX (X = Cr, Mn, Zr) HEAs ranged from 5.25 to 10.12. Nanoindentation tests showed hardness variations when Cr, Mn, and Zr were added to AlFeCoNi HEA, ranging from 4.63 ± 0.18 GPa to 4.36 ± 0.19 GPa, 4.39 ± 0.38 GPa, and 9.25 ± 0.57 GPa, respectively. This hardness increase could be correlated with the atomic size difference parameter δ[%] and to the increased inherent defects within the Al-Ni-rich phase of the as-cast HEAs. Overall, this research underscores the potential for customizing high-entropy alloy properties through chemical composition adjustments, catering to specific demands.

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来源期刊

Journal of Materials Science 工程技术-材料科学：综合

CiteScore

7.90

自引率

4.40%

发文量

1297

审稿时长

2.4 months

期刊介绍： The Journal of Materials Science publishes reviews, full-length papers, and short Communications recording original research results on, or techniques for studying the relationship between structure, properties, and uses of materials. The subjects are seen from international and interdisciplinary perspectives covering areas including metals, ceramics, glasses, polymers, electrical materials, composite materials, fibers, nanostructured materials, nanocomposites, and biological and biomedical materials. The Journal of Materials Science is now firmly established as the leading source of primary communication for scientists investigating the structure and properties of all engineering materials.