Effect of Temperature and Stress on the Structure and Creep Parameters of Pb—2 at% Sb Alloy

Abstract

The transient and steady state creep parameters of Pb–2at% Sb alloy are determined in the temperature range from 443 to 503 K. The transient creep parameters β and n increase with working temperature and applied stress and have values changing from 43×10—4 to 355×10—4 and from 0.46 to 0.79, respectively. The strain rate sensitivity parameter m changes from 0.12 to 0.2 which points to a cross slipping dislocation mechanism. The activation energies of both transient and steady state creep are calculated. In the low temperature range (443 to 473 K), the steady state activation energy is found to be stress dependent. The X-ray analysis supports that relaxation of the internal lattice strain takes place at the transformation temperature (473 K).