Effect of Production Parameters on Impact Energy of Ti-6Al-4V samples Produced by Additive Manufacturing

Abstract

Powder bed melting is an important additive manufacturing process. The process variants are gaining more and more space in the industry: especially in the industry that produces products made of special alloys with additive manufacturing. Selective laser melting is one variant of powder bed fusion processes. In this paper experimental study on impact energy of test specimens made from Ti-6Al-4V alloy, manufactured by selective laser melting is presented. Parameter setup of experiments are defined by design of experiment method, and an empirical formula is fitted to measured data. It is pointed out that impact energy is highly sensitive to manufacturing parameters studied here, and strong interactions are also observed. A formula is derived for costrained optimization on isoenergetic surfaces. Results can be applied for control of an important material property, impact strength of parts manufactured by selective laser melting.