The stacking-fault energy in the Ag-In series

Abstract
The intrinsic stacking-fault energy has been determined in the Ag-In series using extended nodes, from pure silver to Ag-12.5 wt. % In (e/a = 1.23). The present results show that the stacking-fault energy is insensitive to alloying up to e/a ≁ 1.04, after which it decreases with increasing solute content. Extrinsic faulting has been observed throughout the alloy series including pure silver and in all cases the extrinsic and intrinsic stackingfault energies are approximately equal. Following high temperature annealing treatments, the effective stacking-fault energy in high solute content alloys is observed to increase irreversibly, suggesting the presence of a solute impedance force at room temperature.