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

Yoon Hwa; Christopher S. Kumai; Thomas M. Devine; Nancy Yang; Joshua K. Yee; Ryan Hardwick; Kai Burgmann

doi:10.1016/j.jmst.2020.08.022

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

Yoon Hwa, Christopher S. Kumai, Thomas M. Devine, Nancy Yang, Joshua K. Yee, Ryan Hardwick, Kai Burgmann

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

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.

Original language	English (US)
Pages (from-to)	96-105
Number of pages	10
Journal	Journal of Materials Science and Technology
Volume	69
DOIs	https://doi.org/10.1016/j.jmst.2020.08.022
State	Published - Apr 10 2021
Externally published	Yes

Keywords

Additive manufacturing
Directed energy deposition
Microstructure
Rapid solidification
Recoil pressure
Stainless steel

ASJC Scopus subject areas

Ceramics and Composites
Mechanics of Materials
Mechanical Engineering
Polymers and Plastics
Metals and Alloys
Materials Chemistry

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10.1016/j.jmst.2020.08.022

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title = "Microstructural banding of directed energy deposition-additively manufactured 316L stainless steel",

abstract = "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.",

keywords = "Additive manufacturing, Directed energy deposition, Microstructure, Rapid solidification, Recoil pressure, Stainless steel",

author = "Yoon Hwa and Kumai, {Christopher S.} and Devine, {Thomas M.} and Nancy Yang and Yee, {Joshua K.} and Ryan Hardwick and Kai Burgmann",

note = "Publisher Copyright: {\textcopyright} 2020",

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doi = "10.1016/j.jmst.2020.08.022",

language = "English (US)",

volume = "69",

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TY - JOUR

T1 - Microstructural banding of directed energy deposition-additively manufactured 316L stainless steel

AU - Hwa, Yoon

AU - Kumai, Christopher S.

AU - Devine, Thomas M.

AU - Yang, Nancy

AU - Yee, Joshua K.

AU - Hardwick, Ryan

AU - Burgmann, Kai

PY - 2021/4/10

Y1 - 2021/4/10

N2 - 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.

AB - 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.

KW - Additive manufacturing

KW - Directed energy deposition

KW - Microstructure

KW - Rapid solidification

KW - Recoil pressure

KW - Stainless steel

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DO - 10.1016/j.jmst.2020.08.022

M3 - Article

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EP - 105

JO - Journal of Materials Science and Technology

JF - Journal of Materials Science and Technology

ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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