Exploring the effectiveness of different factors on the performance of bimodal Cu-Ag alloys

This paper presents a molecular dynamics analysis of a bimodal nanocrystalline Cu-Ag alloy based on a scaling method. This method generates grain boundary affect zone (GBZA) of a bimodal nanocrystalline Cu-Ag alloy with a bimodal structure by isometric scaling of voronoi boundary vertices. Based on molecular dynamics simulation, the uniaxial tensile tests of bimodal nanocrystalline Cu-Ag alloy have been carried out, and its deformations under different strain conditions are studied while the influences of this deformation on its properties are analyzed. The effect of the coarse grain size of the atoms on the mechanical properties of the alloy has been investigated in previous experimental studies. In this thesis, we will further investigate the effect of the silver atomic composition content of the alloy matrix on its mechanical properties. By observing the internal microstructure of the experimental samples undergoing dislocation movements, it has been found that changing the Ag atomic composition content of the matrix gives feedback on the properties of the material. The specific manifestations of the influence of these variables on the dislocation activity of bimodal nanocrystalline Cu-Ag alloys and the corresponding deformation mechanisms hidden behind them are explored in detail.