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Interfacial Behavior, Electronic Properties, and Microme-chanics Properties of L12-Al3Zr/Al Alloy
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Affiliation:

1.Light Alloy Research Institute, Central South University, Changsha 410083, China;2.College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China;3.State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China;4.Nonferrous Metal Advanced Structural Materials and Manufacturing Collaborative Innovation Center, Central South University, Changsha 410083, China

Fund Project:

National Natural Science Foundation of China (U1837207); Supported by High-Performance Computing Center of Central South University

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    Abstract:

    First-principles simulations were conducted to investigate the micromechanics, thermodynamic, and electrical characteristics of L12-Al3Zr/Al alloy. The computional results show that the interface with bulk-like atomic organization possesses excellent adhesion and the highest interface strength. During the machining process, the interface system preferentially fails at the Al side. According to the non-relaxation tensile test results, the L12-Al3Zr(001)/Al(001) interface system has the highest tensile stress (16.78 GPa). However, after the relaxation tensile test, the L12-Al3Zr(110)/Al(110) interface system has the highest tensile stress (10.18 GPa). Additionally, covalent and metallic bonds are generated between the atoms at interface based on the differential charge density and electronic localized function. The formants of interfacial atom orbitals show that the Al and Zr interface atoms have s-p-d or s-p hybridized orbitals.

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[Li Yong, Yan Jijun, Fu Rong, Zhang Xieyi, Huang Yuanchun. Interfacial Behavior, Electronic Properties, and Microme-chanics Properties of L12-Al3Zr/Al Alloy[J]. Rare Metal Materials and Engineering,2023,52(7):2404~2414.]
DOI:10.12442/j. issn.1002-185X. E20220037

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History
  • Received:November 17,2022
  • Revised:February 28,2023
  • Adopted:March 03,2023
  • Online: July 31,2023
  • Published: July 27,2023