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Journal of Materials Engineering and Performance
Published in: Journal of Materials Engineering and Performance 7/2024

04-05-2023 | Technical Article

Analysis of Mechanical Behavior and Nanostructural Evolution of the Au/AuAl Alloy Interface

Authors: Bo Li, Zhengyun Zhang, Xiaolong Zhou, Manmen Liu, Yu Jie

Published in: Journal of Materials Engineering and Performance | Issue 7/2024

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Abstract

The Au/AuAl alloy interface model was established by classical molecular dynamics simulation, and the uniaxial tensile deformation behavior of the interface model at 300 K and 0.05 Å/ps strain rate and the evolution of dislocations in nanostructures were studied in detail. Simulation results show that the initial stress is negative due to the internal stress caused by the lattice mismatch between Al and AuAl alloys. In Au/AuAl alloy interface model, when the plastic deformation in the local region reaches the limit, large internal stress will be generated due to plastic exhaustion and uneven deformation, which makes some atoms leave the lattice position to form many micro-voids. With increasing strain, they will coalesce into cracks. The fracture of perfect interface model is preferentially formed in Al matrix. After the introduction of circular cracks in the interface center region and above the center region of the Perfect-III interface model, cracks propagation occur in AuAl alloy region during the tensile process. Dislocation density tends to increase when the tensile strength exceeds the maximum value. The glide of Shockley partial dislocation is the main mechanism of interface deformation. This study enriches the analysis of nanostructural evolution of Au/AuAl alloy interface and similar interfaces during deformation.
previous article Mechanical Characterization of Polylactic Acid, Polycarbonate, and Carbon Fiber-Reinforced Polyamide Specimens Fabricated by Fused Deposition Modeling
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Metadata
Title
Analysis of Mechanical Behavior and Nanostructural Evolution of the Au/AuAl Alloy Interface
Authors
Bo Li
Zhengyun Zhang
Xiaolong Zhou
Manmen Liu
Yu Jie
Publication date
04-05-2023
Publisher
Springer US
Published in
Journal of Materials Engineering and Performance / Issue 7/2024
Print ISSN: 1059-9495
Electronic ISSN: 1544-1024
DOI
https://doi.org/10.1007/s11665-023-08214-8

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