Authors:
Emre Ozeren (1), Caglar Unver (1), Guney Mert Bilgin (1), Beyzanur Ertekin (1), Alican Tas (1), Akın Orhangul (1), Emre Dilektasli (1)
1- TUSAS Engine Industries Inc., Turkey
Abstract:
In L-PBF, metal powders are used as feedstock material and can be reused for successive productions. The reused powder usage requires attention in high-quality and reliable part production since the reused powder may effect flowability and built-part properties. In this study, Alloy 718 powder was used over a 40 series of L-PBF build cycles without rejuvenating the powder. The powder characterization was performed in order to investigate the flow behavior of reused powder using several methods. Besides, tensile tests, Archimedes and image processing density measurements were performed in order to investigate the behavior of built-part produced by reused powders. Furthermore, chemical composition analyses were carried out over the bulk samples built via L-PBF. The results showed that no major and meaningful difference was seen among 40 cycles in some powder characteristics and built parts behavior while there are prominent differences in some powder characterization methods and in metallurgical behavior.
DOI:
https://doi.org/10.59499/EP235761708