Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
METAL POWDER PRODUCTION ROUTES FOR ADDITIVE MANUFACTURING AND THEIR IMPACT ON PROCESS AND QUALITY: A REVIEW
Submission Author:
Rodrigo Coelho , BA , Brazil
Co-Authors:
Bruna Callegari, Bruno Caetano dos Santos Silva, Gilmar Batalha, Rodrigo Coelho
Presenter: Bruna Callegari
doi://10.26678/ABCM.COBEM2023.COB2023-2108
Abstract
Many metal additive manufacturing (AM) technologies use powder as raw material, whose characteristics are decisive to the quality of manufactured components. Therefore, understanding powder production for AM and their impact on processing is of vital importance. Metallic powders are mainly produced by gas atomization, which yield spherical particles with optimum properties; on the downside, it is an expensive technique. Water atomization, as well as mechanical methods (crushing, grinding) are cheaper, but produce irregular powders, leading to subsequent processing challenges. Nonetheless, they can be additively manufactured, and validating their suitability is important to enable cost reduction. Such cost reduction might also come as result of the possibility of utilizing scrap as feedstock. Moreover, metallic powders for AM can be either pre-alloyed, master alloys or elemental. Elemental or master alloy powders can be advantageous for compositional adjustment, in situ alloying and manufacturing of functionally graded components (FGCs). The present work provides a summarized review of the main developments of metallic AM powders. Firstly, a glance of atomized powders is given, followed by insights on mechanical methods and the use of scrap as feedstock. In sequence, in situ alloying studies are presented. Finally, a brief overview on spheroidization of irregular powders is given.
Keywords
Additive manufacturing, Atomization, metal powders, Metal alloys, morphology
