The Influence of Heat Treatment on the Structure and Tensile Properties of Cast Titanium Alloy Ti-5111

摘要

The influence of heat treatment on the microstructure and tensile properties of the cast Ti-5111 alloy has been examined. The effects of annealing temperature and cooling rate on the microstructural evolution in this near-alpha alloy are assessed, and the relationships between microstructure and the corresponding tensile properties and fracture behavior are explored. The results indicate good strength in both the as cast condition and after six different heat treatments. The study also indicates heat treatments promoting a large prior beta grain size also result in an occasional low value of tensile ductility in which failure occurs due to crack initiation and growth.