Fatigue Properties of Ti Alloys with an Ultrafine Grained Structure: Challenges and Achievements

Ultrafine-grained (UFG) structure formation in Ti alloys, by severe plastic deformation (SPD) processing and enhancement of their mechanical properties, including fatigue properties, has been demonstrated in numerous studies in the past 20 years. The present overview analyzes the fatigue properties achieved to date in Ti alloys subjected to SPD. Such aspects are examined as the effect of a UFG structure on the fatigue behavior of commercially pure (CP) Ti, two-phase Ti alloys, using the popular Ti-6Al-4V alloy as an example, as well as on the kinetics and mechanisms of fatigue failure. The prospects and problems of the practical application of UFG Ti materials in medicine and aircraft engine construction are discussed.

Automated summary

Numerous studies have demonstrated that ultrafine-grained (UFG) structure formation in Ti alloys by severe plastic deformation (SPD) processing can enhance their mechanical properties, including fatigue properties. In this overview, the fatigue properties achieved in Ti alloys subjected to SPD are analyzed, including the effect of a UFG structure on the fatigue behavior of different types of Ti alloys, the kinetics and mechanisms of fatigue failure, and the prospects and problems of practical application in medicine and aircraft engine construction.