Categorization of ambient temperature creep behavior of metals and alloys on their crystallographic structures

Abstract

The creep behavior at ambient temperature of typical h.c.p., b.c.c. and f.c.c. metals and alloys of annealed state were surveyed. Cubic metals and alloys demonstrated negligible creep strain under all stress ranges. In contrast, h.c.p. metals and alloys demonstrated significant primary creep behavior. In particular, Ti-6Al-4V alloy and CP-Ti metal showed significant creep behavior and accumulated large creep strain more than 1% in 90 s and 1600 s, respectively under 0.9 of 0.2% proof stress. After being cold-rolled, Ti-6Al-4V alloy and CP-Ti metal showed less significant creep behavior.