Theory of solid solution softening in comparison with experiments on α-Fe

Abstract

A previously developed theory of the point defect‐dislocation kink interaction is used for fitting available experiments on softening of α‐Fe doped with atoms of nickel and carbon. A satisfactory fit is achieved to the measured flow stress in a wide temperature range by using only one parameter to characterize the interaction between impurity atoms and dislocation.

Short‐Range Order and Solid Solution Hardening

“…For details we refer to [13]. Let us consider in detail the model of thermally activated overcoming of point obstacles by dislocations [12]. The average velocity movement 8depends on the applied stress cr as where Qo and crc are the height of the potential barrier, created by the defect, and the critical stress for its overcoming, respectively, u is the frequency factor, determining the efficient frequency of thermally activated trials, So is the slip plane area per obstacle.…”