Microstructure and Solute Segregation around the Melt-Pool Boundary of Orientation-Controlled 316L Austenitic Stainless Steel Produced by Laser Powder Bed Fusion

Sato, Kazuhisa; Takagi, Shunya; Ichikawa, Satoshi et al.

Materials, 2022, 16(1), 218

Number of Access:450（2025-07-18 10:23 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/93146

Link to primary information 

File Format Terms of use Size Views Date.Available Description information
Mater_16_1 pdf None 9.96 MB 60 2023.11.16  
Creative Commons : Attribution

Item Information

Output File Export EndNote Basic Export Mendeley

Title
Microstructure and Solute Segregation around the Melt-Pool Boundary of Orientation-Controlled 316L Austenitic Stainless Steel Produced by Laser Powder Bed Fusion
Creator
NRID
1000070314424 1000070314424
ORCID
0000-0001-9078-2541 0000-0001-9078-2541
researchmap permalink
read0158304 read0158304
Scopus Author ID
55552977400 55552977400
CreatorName
Sato, Kazuhisa
researchmap permalink
shunyatakagi shunyatakagi
CreatorName
Takagi, Shunya
NRID
1000080403137 1000080403137
ORCID
0000-0003-3597-1045 0000-0003-3597-1045
researchmap permalink
satoshiichikawa satoshiichikawa
Scopus Author ID
36055779800 36055779800
CreatorName
Ichikawa, Satoshi
NRID
1000050508835 1000050508835
ORCID
0000-0003-0081-0591 0000-0003-0081-0591
researchmap permalink
i_taku i_taku
Scopus Author ID
35310484700 35310484700
CreatorName
Ishimoto, Takuya
NRID
1000030243182 1000030243182
ORCID
0000-0001-8052-1698 0000-0001-8052-1698
researchmap permalink
read0013987 read0013987
Scopus Author ID
7403896013 7403896013
CreatorName
Nakano, Takayoshi
Subject
additive manufacturing
cellular microstructure
laser powder-bed fusion
solidification segregation
transmission electron microscopy
Description
Sato K., Takagi S., Ichikawa S., et al. Microstructure and Solute Segregation around the Melt-Pool Boundary of Orientation-Controlled 316L Austenitic Stainless Steel Produced by Laser Powder Bed Fusion. Materials 16, 218 (2023); https://doi.org/10.3390/ma16010218.
Abstract
For this article, we studied the microstructure and solute segregation seen around the melt pool boundary of orientation-controlled 316L austenitic stainless steel produced by laser powder bed fusion, using transmission electron microscopy and energy-dispersive x-ray spectroscopy. We found that the solidification cellular microstructures could be visualized with the aid of solute segregation (Cr and Mo) during solidification. Mn–Si–O inclusions (10–15 nm in diameter) were distributed along the lamellar boundaries, as well as in the dislocation cell walls. It is believed that the grain growth of the inclusions can be effectively suppressed by rapid quenching during the laser powder-bed fusion process. A thin region without cellular microstructures was observed at the melt-pool boundary. The cellular spacing widened near the bottom of the melt-pool boundary, owing to the decrease in the cooling rate. Atomic-structure analysis at the lamellar boundary by high-resolution transmission electron microscopy revealed a local interfacial structure, which is complementary to the results of electron back-scatter diffraction.
Publisher
MDPI
Source Title
Materials
Volume (Issue)
16(1)
Page
218
Date of Issued
2022-12-26
Language
English
Handle URL
https://hdl.handle.net/11094/93146
eISSN
19961944
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.3390/ma16010218
Access Rights
open access
CopyRight
This article is licensed under a Creative Commons Attribution 4.0 International License.
oaire:version
Version of Record
Category
学術雑誌論文 Journal Article