Microstructural banding of directed energy deposition-additively manufactured 316L stainless steel.

Autor:	Hwa, Yoon, Kumai, Christopher S., Devine, Thomas M., Yang, Nancy, Yee, Joshua K., Hardwick, Ryan, Burgmann, Kai
Předmět:	ENERGY bands POWER density LASER beams STAINLESS steel CHROMIUM SOLIDIFICATION
Zdroj:	Journal of Materials Science & Technology; Apr2021, Vol. 69, p96-105, 10p
Abstrakt:	The microstructures of 316 L stainless steel created by rapid solidification are investigated by comparing the similar microstructures of individual hatches of directed energy deposition additive manufacturing (DED-AM) and those of single, laser surface-melted tracks formed on a solid plate. High recoil pressure, which is exponentially dependent on the laser beam power density, induces convection of the melt pool, which causes formation of microstructural bands in the as-solidified microstructure. The microstructural bands are associated with changes in the chromium concentration and are a significant component of the inhomogeneous microstructure of DED-AM. [ABSTRACT FROM AUTHOR]
Databáze:	Supplemental Index
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