Accessible Requires Authentication Published by De Gruyter August 18, 2021

Theoretical investigations on correlations between elastic behavior of Al-based alloys and their electronic structures

Wen Liu, Chi Zhang, Chunge Wang, Xiang Yan, Xiaoxiong Hu, Pingjun Xu, Xinyu Ye, Zhongzhu Zhuang, Pengfei Liu and Shuyu Lei

Abstract

In this work, using the first-principles method, the alloying stability, electronic structure, and elastic properties of Al-based intermetallics were investigated. It was found that these alloys have a strong alloying ability and structural stability due to the negative formation energies and the cohesive energies. The valence bonds of these intermetallic compounds are attributed to the valence electrons of Cu 3δ states for AlCu3, Cu 3δ and Zr 4δ states for AlCu2Zr, and Al 3s, Zr 5s and 4δ states for AlZr3, respectively. Furthermore, the correlation between elastic properties of these intermetallic compounds and their electronic structures was revealed. The results show that structural parameters and elastic properties such as bulk modulus, shear modulus, Young’s modulus, Poisson’s ratio and anisotropy agreed well with experimental results.


Dr. Wen Liu School of Information and Intelligent Engineering Zhejiang Wanli University Ningbo 315100 P. R. China

Funding statement: This research was funded by Emergency tackling of "key core technology" in Ningbo (grant number: 2020G024 and 2020G012), Ningbo Science and technology innovation 2025 major special project (grant number: 2020Z115, 202002P2004 and 2020Z077), the Public Welfare Technology Research Program of Zhejiang Provincial (grant number: LGG20E050004).

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Received: 2021-02-06
Accepted: 2021-05-18
Published Online: 2021-08-18
Published in Print: 2021-08-31

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