Effect of Grain-Size in Nanocrystalline Tungsten on Hardness and Dislocation Density: A Molecular Dynamics Study

We have simulated a series of nanoindentation experiments on nanocrystalline tungsten specimens using combination molecular dynamics simulations and the embedded atom method potential. The research aimed to investigate impact grain size mechanical properties tungsten. Nanoindentation is technique used measure materials at small scale. In this study, researchers varied specimens, ranging from 7.9 10.5 nanometers. They also applied loading rate 3 angstroms per picosecond temperature 300 Kelvin. study found that as increased, hardness elastic modulus decreased. Hardness material’s resistance deformation, stiffness. findings suggest increases, material becomes harder but less stiff. Additionally, explored ways in which deformed during nanoindentation. deformation was primarily due dislocation activity, consistent with previous topic. Overall, provide valuable insights into deforms under stress. These could practical applications development for use various industries.