Effects of Varying Heat Treatments on the Microstructure and Mechanical Properties of Blown Powder Inconel 625
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Blown powder deposition (BPD) is an additive manufacturing (AM) technique which builds components in a layer by layer fashion. In BPD AM, metal powder is fed through nozzles into the path of a laser beam which is attached to a robotic arm. This increases the size of the build envelope beyond the limitations of powder-bed AM systems. After fabrication, the specimens are subjected to various heat treatments to relieve residual stresses and optimize the mechanical properties. As AM processing is relatively new, heat treatment standards are still being developed. Key to standardization is obtaining an understanding of the key parameters by evaluating differences in BPD materials built by different vendors. This study evaluates the effects of varying heat treatments on the mechanical response of Inconel 625 specimens obtained from four different vendors.
The authors acknowledge funding provide by the Jacobs ESSSA Subcontract, NASA Grant NNM17AA02A. Specimens evaluated were provided by: DM3D, Formalloy, Joining Technologies, Alabama Laser, & RPMI.
Conflict of interest
The authors declare that they have no conflicts of interest.
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