Peculiarities of microstructure and mechanical behavior of VT8M-1 alloy processed by rotary swaging

摘要

This research is focused on the study of the relationship between microstructure and mechanical behavior of two-phase Ti alloy VT8M-1 (Ti-5.7Al-3.8Mo-l.2Zr-l.3Sn) in the ultrafine-grained (UFG) state, which is produced by rotary swaging (RS) as compared to equal-channel angular pressing (ECAP). It is shown that both processing techniques enable forming a UFG structure and enhanced mechanical properties in the alloy. Distinguishing features of the UFG structure produced by RS are conditioned by different stress-strained states in the alloy in comparison with ECAP. The relationship between structure, strength and ductility of the alloy processed by RS and ECAP is discussed.