Gagel, J.J.GagelWeygand, D.D.WeygandGumbsch, P.P.Gumbsch2022-03-052022-03-052018https://publica.fraunhofer.de/handle/publica/25514410.1016/j.actamat.2018.06.002Plastic deformation largely determines the properties of tribological contacts. To modify such contacts, it is thus necessary to understand the underlying mechanisms of dislocation motion and multiplication. In a sliding contact, dislocations do not only multiply, but also follow the moving tip d and are therefore transported by the tip. Three dimensional Discrete Dislocation Dynamics simulations of sliding with a spherical tip are conducted to analyse dislocation transport in an fcc crystal, at stresses below those typically required to nucleate dislocations at a free surface. Sliding direction, glide plane orientation and Burgers vector orientation determine whether a dislocation can be transported or not, and how far the transport leads. A model is proposed to identify the glide sys tems, on which dislocations are transported.endislocationtransporttribologydiscrete dislocation dynamic620669journal article