Alessandro Ruggieri
The influence of Hot Isostatic Pressing performed above solidus temperature of LPBFed Inconel 939 for microstructural improvement.
Rel. Daniele Ugues, Emilio Bassini. Politecnico di Torino, Corso di laurea magistrale in Ingegneria Dei Materiali, 2024
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Abstract
Ni-based superalloys are a particular class of metallic materials primarily used in the energy production field (nuclear, oil and gas) and in the aerospace sector, where they are particularly employed in the production of turbine blades and casings. This is because Ni-based superalloys retain their mechanical stability at high temperatures, as they can operate up to 80-85% of their melting temperature without experiencing a significant loss in strength. Moreover, they exhibit excellent high-temperature oxidation resistance, a crucial aspect for sectors with extreme temperature conditions or contact with corrosive fluids. However, these alloys are challenging to process due to their high melting temperature, poor castability, and forgeability, which only allows the production of components with simple geometries.
This makes additive manufacturing a highly appealing process for these alloys
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