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Metallurgical and Materials Transactions B
Published in: Metallurgical and Materials Transactions B 2/2019

02-01-2019

Band-Like Distribution of Grains in Selective Laser Melting Track Under Keyhole Mode

Authors: Yafei Wang, Leilei Xing, Kailun Li, Chenfan Yu, Jing Ma, Wei Liu, Zhijian Shen

Published in: Metallurgical and Materials Transactions B | Issue 2/2019

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Abstract

Grain structure in the melt pool under keyhole mode is complex due to complicated solidified conditions, especially in consideration of the intense fluid flow. This paper aims to clarify grain structure and grain growth mechanism in melt pool under keyhole mode in selective laser melting. The microstructure from transverse cross section and longitudinal cross section near the centerline of 316L single tracks was characterized. In the longitudinal cross section, band-like grain structure formed. It is found that fluid flow can refine the grains, and large columnar grains grow towards crystallographic 〈110〉 direction.
previous article Effects of Slag Composition on H2 Generation and Magnetic Precipitation from Molten Steelmaking Slag–Steam Reaction
next article Additive Manufacturing of a Steel–Ceramic Multi-Material by Selective Laser Melting

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Metadata
Title
Band-Like Distribution of Grains in Selective Laser Melting Track Under Keyhole Mode
Authors
Yafei Wang
Leilei Xing
Kailun Li
Chenfan Yu
Jing Ma
Wei Liu
Zhijian Shen
Publication date
02-01-2019
Publisher
Springer US
Published in
Metallurgical and Materials Transactions B / Issue 2/2019
Print ISSN: 1073-5615
Electronic ISSN: 1543-1916
DOI
https://doi.org/10.1007/s11663-018-1483-5

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