Single, Temperature-Dependent Stress-Strain Law for the Dynamic Plastic Deformation of Annealed Face-Centered Cubic Metals

Abstract

Large amplitude wave propagation in annealed aluminum is studied experimentally to within 70°C of the melting point of the metal. The strain-rate-independent, finite amplitude wave theory is found to apply at all temperatures. The governing stress-strain law in each instance is parabolic. The coefficient of the parabolic stress-strain law varies linearly with the absolute temperature. The annealed, face-centered cubic metals of aluminum, copper, lead, gold, and silver are all found to have the same parabolic stress-strain law at absolute zero. Thus, from experiments using the author's diffraction grating technique, a single stress-strain law is found which is applicable at any temperature to any of these annealed metals whose melting point is specified.