Certain investigations on mechanical Properties and machining characteristics Of pressure die casted lm 25 aluminium Alloy using multi objective optimization

Abstract

The utilization of aluminium has increased in the last two decades owing to excellent mechanical properties such as high strength to weight ratio, good stiffness, high durability, good corrosion resistance, etc. The production of complex shapes in casting, die casting methods is widely used. Die casting is a metal casting process where the molten metal is pressurized inside the mould cavity to produce the desired shape. This process can overcome or minimise the complications of casting defects such as gas porosities, shrinkage, hot tears, segregation, etc. As a result, aluminium alloys can be die casted to any complex part geometries involving thin wall structures with high dimensional stability. Parts such as pressure vessels, hydraulic cylinders and automotive engines are manufactured using die casting techniques.In this research work, pressure die casting process LM 25 aluminium alloy is used as a research material for machining characteristics study. Parts of automotive industries such as pressure vessels, pistons, automotive engines, etc are manufactured using this material in the recent times.Pressure Die Casting (PDC) comprises larger production rate compared to gravity casting. Many researches were done in the area of pressure die casting, but study concentration of machining characteristics and performance of cast components is limited. A fully automated machining process produces a higher productivity without compromising the time. Some of the research work illustrates that attention on getting maximum productivity itself leads to compromise the surface integrity of machined area. Though all the machining process is automated, even there is a trouble raised in choice of machining parameters newline newline newline