Authors:
Pierre-Eric Frayssines (Univ. Grenoble Alpes, CEA, LITEN, DTCH, LCA, France),
Yang Shen (EDF, France),
Thomas Geneves (FRAMATOME, France)
Abstract:
Powder metallurgy and HIP (P|M HIP) provides dense materials with fine-grained microstructures and isotropic mechanical properties, which compete well with the mechanical properties of forged materials. In the nuclear industry, it is thus a credible solution to maintain the performance and the competitiveness of the nuclear power plants. However, the manufacturing of nuclear components is submitted to close control and traceability in order to achieve a high standard of metallurgical quality. This includes HIP parameters (temperature, pressure and time) to densify the powder. In this study, the influence of HIP temperature between 1373K and 1473K on the densification of a 304L nitrogen-atomised powder was addressed. According to the microstructures and the mechanical properties of the P|M samples (tensile tests and KV impact toughness), we propose a HIP temperature of 1433K to densify this powder. This temperature is in agreement with the recommendations formulated in the industry to densify 304L powder.
DOI:
https://doi.org/10.59499/WP225371522