Investigation of severe plastic deformation effect on microstructure of Ti-6Al-4V alloy

Abstract In this study for investigation of severe plastic deformation effect on microstructure of Ti-6Al-4V alloy the accumulative roll bonding (ARB) process applied up to four cycles (equivalent strain of 3.2) at 300 ?C. X-ray Diffraction (XRD) test was done for study of phase variation and observations of grain size variations. The results shows after the end of first cycle of ARB, many variations in XRD patterns were made which are results of grain size and texture in material. In addition, variations in XRD pattern are very low, as a result of happening in dynamical recovery because of stacking fault energy high rate of this alloy. For investigating of microstructural alloy of optical microscopy and field emission scanning electron microscopy (FESEM) and for measuring of grain size of transmission electron microscopy (TEM) are used. The results shows that ultra fine grain structure are including ??phases in fourth cycles of ARB and shall produce grain with about approximately 80 nm.