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Laser Powder Bed Fusion of Chromium Bronze Using Recycled Powder

Laser powder bed fusion (LPBF) of Cu-0.5Cr was carried out using recycled powder taken out from the LPBF machine after previous printing. Various volumetric defects characterized the powder wherein particle size distribution was the same as virgin powder. Using recycled powder resulted in extra sphe...

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Detalles Bibliográficos
Autores principales: Pelevin, Ivan A., Burmistrov, Maxim A., Ozherelkov, Dmitriy Yu., Shinkaryov, Alexander S., Chernyshikhin, Stanislav V., Gromov, Alexander A., Nalivaiko, Anton Yu.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8269624/
https://www.ncbi.nlm.nih.gov/pubmed/34208840
http://dx.doi.org/10.3390/ma14133644
Descripción
Sumario:Laser powder bed fusion (LPBF) of Cu-0.5Cr was carried out using recycled powder taken out from the LPBF machine after previous printing. Various volumetric defects characterized the powder wherein particle size distribution was the same as virgin powder. Using recycled powder resulted in extra spherical pore formation after the LPBF process. Despite that, a relative density of 99.2% was achieved by LPBF parameters optimization. Solidified microstructure with a small volume of defects consisted of an oversaturated dendritic Cu matrix and nano-sized Cr precipitations providing strengthening mechanism occurrence. The possibility of a satisfactory level of mechanical properties with σ(0.2) = 136.8 MPa, UTS = 187.4 MPa, along with 15.5% of elongation achieving, was shown.