MECHANICAL PROPERTIES OF Ni3Al WITH TERNARY ADDITION OF TRANSITION METAL ELEMENTS.

Abstract

The rate of solid solution hardening per one atomic percent of the solute, d sigma /dc, was determined for each ternary addition using the compressive flow stress measured at liquid nitrogen temperature. It is found that d sigma /dc cannot be simply correlated with the rate of lattice parameter change, da/dc, although a linear correlation has been found for the addition of B-subgroup elements. The rate of change in activation energy to provide the anomalous positive temperature dependence of strength per one atomic percent of the solute, dU/dc, is evaluated.