New analytical procedure for the identification of high temperature deformation mechanisms using the strain rate change test

Abstract

The strain rate change test may be used to identify the process controlling the high temperature deformation of metals and metallic alloys. This paper presents a new analytical procedure which has several advantages: (i) it reduces the experimental difficulties inherent in an earlier analysis, (ii) it permits the incorporation of results from stress relaxation tests, and (iii) it does not necessarily require a testing machine having a high stiffness. The analytical procedure is described with reference to experimental data on pure Al and an Al-5.4 at% Mg solid solution alloy.