| Abstract Scope |
This research explores the impact of alloying elements, particularly Hf and/or Ti, on the slip behavior of Nb and Ta-based multicomponent solid solution alloys with a body-centered cubic (bcc) crystal structure using molecular dynamics (MD) simulations. The study compares different binary and multicomponent bcc alloys under shear deformation. Without alloying elements, the a/2<111> screw dislocation's slip plane changes from the {110} plane to the {112} twinning slip plane in both pure Nb and Ta. However, with the addition of Hf and Ti, the slip plane transitions from the {112} twinning slip plane to the {110} slip plane at intermediate concentrations of alloying elements. At high concentrations, the slip plane shifts to the {112} anti-twinning slip plane. These transitions depend on strain rates, temperatures, and the stability of metastable phases. Understanding these slip plane transitions can improve the mechanical properties of bcc multicomponent alloys by reducing strain localization and enhancing ductility. |