ABSTRACT

The formation of a fivefold deformation twin in nanocrystalline Al is studied by the quasicontinuum method The Study focuses oil the microstructure effect on the formation process A particular low-index grain boundary, which has been investigated ill a bicrystal model, is observed in the sample The dislocation reflection and inhomogeneous Stress distribution caused by this rain boundary are discussed The Importance of this microstructure to the formation of it fivefold deformation twin IS manifested by the results.