Thermal expansion behaviour of Invar 36 alloy parts fabricated by wire-arc additive manufacturing

Invar 36 alloy is of high interest in various industrial sectors, due to its reduced thermal expansion properties. This study aims validate Wire-Arc Additive Manufacturing (WAAM) technology as a valid method for manufacturing aerospace tooling 36. The main novelty and the objective this work properties deposited by WAAM provide guidelines manufacture parts using technology. To do so, behaviour specimens manufactured Gas Metal Arc Welding (GMAW)-based Plasma (PAW)-based analyzed subsequent comparison with values obtained from laminated sample used reference specimen. A wall each technology, comparative purposes, which were extracted dilatometry test metallographic analysis. results these analyses show advantages GMAW parts, it presents same material less presence precipitates no macrostructural failures such pores, cracks lacks fusion. Furthermore, conclude, an aeronautical that has been within demonstrated potential specialized parts.