The effect of the specimen size on mechanical characteristics material, a phenomenon commonly referred to as “size effect”, becomes increasingly important at micron and sub-micron dimensions specimen. However, majority studies face-centered cubic (fcc) metals have focused pure elements, where deformation is accomplished by dislocation glide. In this work, single crystalline Ni – x at. % Co (wit...

The generalized stacking fault (SFE) energy curves of pure gold (Au) and its binary alloys with transition metals are determined from density functional theory (DFT). Alloy elements Ag, Al, Cu, Ni, Ti, Zr, Zn, In, Ga, Sn, Mn, Cd, Ta Cr substituted into Au at concentrations up to 4%. A comparison various proposed methodologies calculate SFEs is given. intrinsic SFE decreases for all alloying val...

Existing approaches for friction (critical) stress determination are highly unsatisfactory because of empiricism associated with dislocation “core-width” and nature core-advance. This study, focusing on the a/2〈011〉 extended-dislocation (partials bounding a stacking-fault) in Face-Centered-Cubic (FCC) materials, rigorously derives core-width continuum strain-energy atomistic misfit-energy consi...