Authors:
Anna Larsson (1), Johannes Gårdstam (2), James Shipley (2)
1- Höganäs AB, Sweden
2- Quintus Technology AB, Sweden
Abstract:
Additive manufacturing is gaining interest for manufacturing of critical components within sectors like aerospace, industrial gas turbine and other applications within the energy sector where the demand for high temperature resistant alloys is needed. Ni based super alloys are used for their high strength at elevated temperatures, the corrosion resistance and creep resistance. The powder bed fusion-laser beam (PBF-LB) technique makes it possible for advanced design with tailored features like internal cooling channels not possible to manufacture with traditional technique. The PBF-LB process needs to be optimized for the specific alloy and to the component design but still print defects like gas pores, voids and cracks could occur. To increase the robustness and confidence of the produced parts, a hot isostatic pressing (HIP) step could be added to eliminate or minimize these defects. In this study the properties of LB-PBF manufactured nickel base super alloys are examined. The influence of the print process, as well as post processes like heat treatment, HIP and the combination of the last two on the mechanical properties and on the microstructure was examined.
DOI:
https://doi.org/10.59499/EP246281597
