Crystal plasticity simulations of fretting of Ti-6Al-4V in partial slip regime considering effects of texture

Generalized plane strain finite element fretting simulations of a rigid cylinder in contact with a Ti-6Al-4V half-space represented via 3-D polycrystal viscoplasticity model are performed in the partial slip regime. The dual-phase nature of Ti-6Al-4V and realistic 3-D crystallographic textures are explicitly accounted for in the model. Earlier studies using idealized 2-D slip geometry in 2-D finite element calculations indicate that ratcheting is the dominant mechanism of cyclic plastic deformation for this material under fretting conditions. Herein, changes in the distribution and mode of cyclic microplasticity with respect to different representative 3-D textures are examined and compared to observations from simulations using the 2-D slip geometry. Results are discussed and quantified in terms of cumulative effective plastic strain distributions, plastic strain maps, and the effective ratchet strain increments.