Because of its potential to produce ultra fine grains Equal Channel Angular Pressing (ECAP) is widely being used now a day in almost all manufacturing sector. The physical and mechanical properties have been increasingly recognized by ECAP. In all most all manufacturing processes, with the help of plastic deformation the required shape and size are obtained for example ,sometimes products its self will be deformed through rolling, extrusion, drawing etc, and by another deforming process called the metal removal through grinding, milling and cutting operation. In these processes, load is applied on the material and the processes are continued till they get the required strain or grain refinement but it is not possible in conventional deformation. But in this sever plastic deformation process (SPD), we choose the channel angle of either 60º,90º, 112.5º, 120º, 135º and so on, that depends upon the type of material and if you are using composite material than the reinforcing particle will play an important role. There are 4 types of routes or process used in (SPD) are as follows Route A, Route BC, Route BA, Route C. In this paper we will discuss about the effect of all these channel angles (few of them) about their strain rate grain refinement etc. Along with these, we will also discuss regarding the microstructures of SPD processed samples with as cast samples
