Research Article
Shantharaja M
Abstract
Severe Plastic Deformation (SPD) process is capable of developing the submicron grain structures in metallic alloys and to improve the Mechanical properties. Constrained groove pressing is a processing method in which a metal is subjected to an intense plastic deformation through repeated dominant shearing and pressing (flatting) of plate. This method comprises bending of straight billet with corrugated tools and the restoring the straight shape of the slab with flat tools. The repetition of the process is required to obtain a large strain and desired structural changes. The Constrained Groove Pressing (CGP) processes are widely used in industries to compensate the high strength metal plates components used in automobiles. In the present work an attempt has been made to study the influence of CGP parameters like strain rate and number of passes to predict the degree of importance on grain size, micro hardness and tensile strength of CGP specimens. The results indicated that the number of passes has a major influence on the fine-grain refinement followed by strain rate.