Authors:
Matthew Dunstan (US Army Research Lab, USA),
Brady Butler (US Army Research Lab, USA),
Isaac Nault (US Army Research Lab, USA),
James Paramore (US Army Research Lab, USA)
Abstract:
Cold Spray Additive Manufacturing (CSAM) is a solid-state additive technology where metal powders are accelerated through a converging-diverging Laval type nozzle using a pressurized carrier gas. These powders are then sprayed onto a substrate in the shape of the desired component and subsequently removed. As only low temperatures (<1000 °C) are used during CSAM, the strength of the component relies completely on particle deformation and interlocking as very little diffusional processing takes place in order to create metallurgical bonds. Post-spray heat treatments are often necessary in order for components to achieve mechanical properties similar to other additive techniques. In this work, the heat treatment process known as Thermohydrogen Reduction of Microstructure (THRM), which was initially developed for laser based additive manufacturing, is applied to Ti-6Al-4V components produced via CSAM. Its effect on density, microstructure, and tensile properties are examined.
DOI:
https://doi.org/10.59499/WP225365785