Modelling the mechanical strengthening parameter of sintered Fe-0.8%C preforms under cold upsetting

Powder metallurgy (PM) is one of the net shape or near net shape processes, which simply means almost all the initial material is converted into final product. However, to produce product with high strength is a main challenge due to readily available porosities, which are highly governed by several process parameters. An optimised methodology is necessary for PM experiments. In conventional means it is such a tedious, costlier and time consuming, thus design of experiments (DoE) principles have been used to model the mechanical strengthening parameters of sintered Fe-0.8%C preforms during cold upsetting operations. The process parameters such as aspect ratios and frictional conditions are varied by keeping initial density as constant. The resulting model shows that the parameters are not significantly influencing the strength coefficient, which is otherwise for strain hardening exponent