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

被引：16

作者：

Hwa, Yoon ^{[1
]}

Kumai, Christopher S. ^{[1
]}

Devine, Thomas M. ^{[1
]}

Yang, Nancy ^{[2
]}

Yee, Joshua K. ^{[2
]}

Hardwick, Ryan ^{[2
]}

Burgmann, Kai ^{[2
]}

机构：

[1] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA

[2] Sandia Natl Labs, Livermore, CA 94551 USA

来源：

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2021年 / 69卷

关键词：

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

D O I：

10.1016/j.jmst.2020.08.022

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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. (C) 2021 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.

引用

页码：96 / 105

页数：10

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