On the numerical atomistic characterization of interfacial plasticity


Julien Guénolé
LEM3, CNRS - Université de Lorraine, Metz, France

18. February 2020, 17.00
WW8, Raum 2.018, Dr.-Mack-Str. 77, Fürth


Interfaces such as grain boundaries and phase boundaries play a crucial role in the plastic deformation of materials. While the interaction between dislocations and grain boundaries has been studied for decades in simple cases, like low for angle grain boundary or with 2D approaches, realistic features of interfaces have been largely ignored. High angle non-symmetric grain boundaries, phase boundaries with complex intermetallic, segregated solute are among many degrees of freedom that can alter drastically the stabled model for interfacial plasticity.
In this presentation, we will explore some possibilities offered by atomistic simulations based on semi-empirical potentials to shade lights on the plasticity at complex interfaces. Examples will include high-angle grain boundaries in FCC metal and complex phase boundary in HCP alloys, with a particular focus on the interactions of such interfaces with dislocation(s).