Author/Authors :
Wu، نويسنده , , S.D. and Wang، نويسنده , , Z.G. and Jiang، نويسنده , , C.B. and Li، نويسنده , , Gy. and Alexandrov، نويسنده , , I.V. and Valiev، نويسنده , , R.Z.، نويسنده ,
Abstract :
Two kinds of shear bands (SBs) which are persistent slip bands (PSB)-like SBs and step-like SBs were found in cyclically deformed ultrafine grained copper processed by ECAP. The SBs and adjacent microstructures were investigated using electron channeling contrast in scanning electron microscope (SEM-ECC). The possible formation mechanisms of SBs are discussed based on the cooperative grain boundary sliding.
Keywords :
Copper , shear Bands , Fatigue , Ultrafine grained microstructure , ECAP
