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

アクセス数:34件（2025-04-03 22:04 集計）

固定URL: https://hdl.handle.net/11094/93146

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タイトル
Microstructure and Solute Segregation around the Melt-Pool Boundary of Orientation-Controlled 316L Austenitic Stainless Steel Produced by Laser Powder Bed Fusion
著者
NRID
1000070314424 1000070314424
ORCID
0000-0001-9078-2541 0000-0001-9078-2541
researchmap permalink
read0158304 read0158304
Scopus Author ID
55552977400 55552977400
著者名
Sato, Kazuhisa
researchmap permalink
shunyatakagi shunyatakagi
著者名
Takagi, Shunya
NRID
1000080403137 1000080403137
ORCID
0000-0003-3597-1045 0000-0003-3597-1045
researchmap permalink
satoshiichikawa satoshiichikawa
Scopus Author ID
36055779800 36055779800
著者名
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
著者名
Ishimoto, Takuya
NRID
1000030243182 1000030243182
ORCID
0000-0001-8052-1698 0000-0001-8052-1698
researchmap permalink
read0013987 read0013987
Scopus Author ID
7403896013 7403896013
著者名
Nakano, Takayoshi
キーワード等
additive manufacturing
cellular microstructure
laser powder-bed fusion
solidification segregation
transmission electron microscopy
内容
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.
抄録
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.
出版者
MDPI
収録物名
Materials
巻(号)
16(1)
ページ
218
刊行年月
2022-12-26
言語
英語
ハンドルURL
https://hdl.handle.net/11094/93146
eISSN
19961944
関連情報 (isIdenticalTo)
DOI (出版社版)
https://doi.org/10.3390/ma16010218
アクセス権
open access
権利情報
This article is licensed under a Creative Commons Attribution 4.0 International License.
出版タイプ
Version of Record
カテゴリ
学術雑誌論文 Journal Article