Cheng, Y.Y.ChengMrovec, M.M.MrovecGumbsch, PeterPeterGumbsch2022-03-0411.7.20092008https://publica.fraunhofer.de/handle/publica/21581010.1080/1478643080189457710.24406/publica-r-215810The strength of polycrystals is largely controlled by the interaction between lattice dislocations and grain boundaries. The atomistic details of these interactions are difficult to discern even by advanced high-resolution microscopy methods. In this paper we present results of atomistic simulations of interactions between an edge dislocation and three symmetric tilt grain boundaries in body-centred cubic tungsten. Our simulations reveal that the outcome of the dislocation-grain-boundary interaction depends sensitively on the grain boundary structure, the geometry of the slip systems in neighbouring grains, and the precise location of the interaction within the grain boundary. A detailed analysis of the evolution of the grain boundary structures and local stress fields during dislocation absorption and transmission is provided.engrain boundarydislocationTEM-study620530journal article