Multi-Objective Optimization of Squeeze Casting Process using Evolutionary Algorithms

Introduction

Hybrid squeeze casting process has been developed by combining the distinguished features such as strength, integrity, economic, and design flexibility of conventional casting (gravity and die casting) and forging processes (Rajgopal, 1981). The technical benefit of the squeeze casting process over conventional casting and forging process cited in the literature (Rajgopal, 1981; Ghomashchi & Vikhrov, 2000) are near net-shape castability, simpler tooling construction, high productivity, refined structure, improved surface finish, heat-treatability, minimum porosity and segregations, ability to cast ferrous, non-ferrous and wrought alloys. Hence, the squeeze cast parts are used in automobile parts, namely piston, cylinder, clutch housing, brake drum, engine block, connecting rod, wheels, suspension arm, hubbed flanges, barrel heads, truck hubs, and so on (Rajgopal, 1981; Ghomashchi & Vikhrov, 2000; Krishna, 2001).