The Effect of Atomic Interdiffusion at the Al/Сu Interface in an Al/Сu Composite on Its Mechanical Properties: Molecular Dynamics

• Published in: Physics of metals and metallography 2023-04, Vol.124 (4), p.394-401
• Main Authors: Polyakova, P. V., Baimova, J. A.
• Format: Article
• Language: English
• Subjects: Aluminum; Chemistry and Materials Science; Composite materials; Composite structures; Copper; Deformation; Deformation effects; Dynamic mechanical properties; Interdiffusion; Materials Science; Mechanical properties; Metallic Materials; Molecular dynamics; Shear deformation; Strength and Plasticity; Tensile tests
• ISSN: 0031-918X; 1555-6190
• DOI: 10.1134/S0031918X22602116

Composites with an aluminum matrix are relevant materials for research, since they are superior to conventional materials in their mechanical characteristics and can be used in various industries. In this work, the method of molecular dynamics is used to study the interdiffusion at an Al/Cu mixing interface under compression combined with the shear deformation. Molecular dynamics tensile tests of the obtained composite have been performed after combined compression to different strains. The deformation scheme used in this work is a simplified scenario that was previously experimentally performed to obtain Al/Cu composites. It has been shown that compression combined with the shear deformation is an effective way to obtain a composite structure. It has been found that under deformation Cu atoms more easily diffuse into an Al block than Al atoms diffuse into a Cu block. Tensile tests performed after the combined compression show that fracturing occurs in the aluminum part of the composite; therefore, the Al/Cu mixing interface is stronger than the pure aluminum part.