Authors:
Miren Aristizabal (Ceit, Spain),
Unai Galech (Ceit, Spain),
Rafael Soler (ITP-Aero, Spain),
Estibaliz Paños (ITP-Aero, Spain),
Iñigo Iturriza (Ceit, Spain)
Abstract:
Gas atomised powder is widely used for HIP applications thanks to its beneficial properties in terms of flowability, compactability and few interstitials. Generally, a wide range of powder particle size is used in HIP to increase the powder efficiency, flow and compaction. While thin particles have to deal with oxygen pick up, wider powders suffer from entrapped gas porosity. These issues have been analysed and related with the properties of HIPped high temperature Ni superalloy. Characterisation have been carried out by mean of chemical analyses, microstructural analyses and mechanical tests. Results show that thin powders are prone to form PPBS and large powders have higher content of argon and both led to a ductility reduction. As a conclusion, gas atomised powder combining wide particle size range showed the best property compromise for Astroloy, making it suitable for the production of elevated temperature components for high-efficiency new jet engines.
DOI:
https://doi.org/10.59499/WP225371919