Authors:
Thierry Baffie (CEA-LITEN, Univ.Grenoble Alpes, France),
Guilhem Roux (CEA-LITEN, Univ.Grenoble Alpes, France),
Mathieu Soulier (CEA-LITEN, Univ.Grenoble Alpes, France),
Michel Pellat (CEA-LITEN, Univ.Grenoble Alpes, France),
Claudia Salvan (CEA-LITEN, Univ.Grenoble Alpes, France),
Claudie De Vernon (TOLECTRO SAS, France)
Abstract:
Recently, we showed that >99% dense CuCrZr parts can be produced by Laser Powder Bed Fusion (L-PBF) process using a large power range (270 to 480W) [1,2]. The as-built (AB) microstructure is anisotropic showing columnar grains aligned along building direction (BD). After a solution annealing and age hardening (SA+AH), solidification cells disappear and the dislocations density decrease, whereas partial recrystallization, twins and Cr nano-precipitates are observed. Even if the microstructure is not fully similar to wrought CuCrZr one, yield strengths are equivalent. This work aimed to develop further the process by: (i) evaluating the impact of incoming powders and lasing parameters on the AB microstructure, (ii) analyzing the microstructural effects of SA+AH and (iii) comparing the mechanical, thermal and electrical properties in both conditions for three powders.[1] C.Salvan et al., Proceedings EuroPM2019, Oct.13-17 2019[2] C.Salvan et al., Mat. Sci. & Eng. A 826 (2021) 141915
DOI:
https://doi.org/10.59499/WP225371437