Research Progress on Slip Behavior of α-Ti under Quasi-Static Loading: A Review

Abstract

This paper reviews the dislocation slip behavior of α phase in α, near α and α + β titanium alloys dominated by α-Ti deformation under quasi-static loading. The relation of slip activity, slip transfer, slip blocking, twinning and crack initiation is discussed, mainly combined with in situ tensile technology. The slip behavior in Ti-alloys is analyzed in detail from the aspects of critical resolved shear stress (CRSS), grain orientation distribution and geometric compatibility factor m′. In addition, slip blocking is an important factor of the formation of twins and micro-cracks. The interaction of slip behavior and interfaces is clarified systematically. Finally, the insufficiency of current research, future research directions and key difficulties of study are also discussed.

Microstructure characteristics and strain hardening behaviour of Ti17 linear friction welded joints

“…As the strain rate increases from 10 −5 to 10 −2 s −1 , the YS increases from 922 to 1048 MPa, and the UTS increases from 1012 to 1071 MPa. Under the mentioned strain rate conditions, the plastic deformation mechanism of the joints is associated with dislocation slip [19]. A higher strain rate leads to an increased dislocation slip rate, increasing deformation resistance [20].…”