STUDIES OF FACTORS AFFECTING THERMAL STABILITY OF TITANIUM-BASE ALLOYS

摘要

Studies were made to determine the factors that influence the stabiliza-tion and the thermal stability of alpha-beta titanium alloys. Thermal sta-bility for three commercial alloys, MST-6A1-4V, Ti-155A, and C-130AM, was good for three heat-treatment conditions under creep exposure tests through 800 F. Some loss of ductility was observed for the Ti-155A and C-130AM alloys fabricated in the beta field and annealed in the alpha-beta field.nSubstitutions of various beta stabilizers in a Ti-5Cr-5Mo alloy were made to check their effects on thermal stability.nSmall amounts of strain introduced either before equilibration or before stabilization, had no significant effect on thermal stability of a Ti-5Cr-5Mo alloy.