Twin interaction with <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="d1e400" altimg="si155.svg"><mml:mrow><mml:mi>?</mml:mi><mml:mn>11</mml:mn></mml:mrow></mml:math> tilt grain boundaries in BCC Fe : Formation of new grain boundaries

It is well known that the twinning an important mode of plastic deformation in nanocrystalline materials. As a result, it expected twin can interact with different grain boundaries (GBs) during deformation. Understanding these twin–GB interactions crucial for our understanding mechanical behavior In this work, interaction ?11 symmetric and asymmetric tilt GBs has been investigated BCC Fe using molecular dynamics (MD) simulations. The results indicate nucleate from crack or GB and, its leads to formation new GB. This consist ?100? Cottrell type immobile dislocations. detailed atomistic mechanisms responsible have revealed Interestingly, not observed case GBs.