Molecular dynamics study of lattice rearrangement under mechanically activated diffusion
- Authors: Nikonov A.Y.1,2, Konovalenko I.S.1, Dmitriev A.I.1,2,3
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Affiliations:
- Institute of Strength Physics and Materials Science, Siberian Branch
- National Research Tomsk State University
- National Research Tomsk Polytechnic University
- Issue: Vol 19, No 1 (2016)
- Pages: 77-85
- Section: Article
- URL: https://journals.rcsi.science/1029-9599/article/view/190784
- DOI: https://doi.org/10.1134/S1029959916010082
- ID: 190784
Cite item
Abstract
The paper presents a molecular dynamics study to investigate the behavior of materials under loading by friction stir welding (FPW). The loading is simulated by assigning constant angular and forward velocities to a certain group of atoms, being a FPW tool. The joined materials are two defect-free Cu crystallites, Cu and Fe crystallites, and two crystallites of the same solid solution structured as D16 (2024) alloy. It is found that as the tool passes along the weld line, the crystal structure of the materials is rearranged with subsequent mixing of their surface atoms. Under certain loading conditions, the crystal lattice after passage of the tool recovers its regular order. Also analyzed is the influence of vibrations additionally applied to the FPW tool. The simulation results provide a better understanding of the processes involved in mechanically activated diffusion.
About the authors
A. Yu. Nikonov
Institute of Strength Physics and Materials Science, Siberian Branch; National Research Tomsk State University
Email: dmitr@ispms.tsc.ru
Russian Federation, Tomsk, 634055; Tomsk, 634050
Iv. S. Konovalenko
Institute of Strength Physics and Materials Science, Siberian Branch
Email: dmitr@ispms.tsc.ru
Russian Federation, Tomsk, 634055
A. I. Dmitriev
Institute of Strength Physics and Materials Science, Siberian Branch; National Research Tomsk State University; National Research Tomsk Polytechnic University
Author for correspondence.
Email: dmitr@ispms.tsc.ru
Russian Federation, Tomsk, 634055; Tomsk, 634050; Tomsk, 634050