A Thermo-Mechanical Analysis of Laser Hot Wire Additive Manufacturing of NAB

There is increased interest in using nickel aluminum bronze (NAB) alloys large-scale directed energy deposition additive manufacturing (DEDAM) processes for maritime applications, but one challenge lies the component distortion that results from residual stress generated during fabrication. This paper describes development and evaluation of thermo-mechanical simulations laser hot wire (LHW) DEDAM NAB to predict part distortion. To account dearth temperature-dependent properties C95800 open literature public databases, material mechanical were experimentally measured test specimens fabricated with a variety processes. Autodesk’s Netfabb Local Simulation software, commercial finite-element based AM solver, was employed its heat source model modified accommodate LHW DEDAM’s oscillating path additional input supplied by preheated feedstock. Thermo-mechanical conducted both acquired constant room-temperature assess impact on simulation accuracy. The usage analysis resulted significantly different predicted compared those properties, at times even predicting substrate displacement an opposite direction.