【公開日：2023.08.01】【最終更新日：2023.07.28】
課題データ / Project Data
課題番号 / Project Issue Number
22OS0040
利用課題名 / Title
レーザ粉末床溶融結合法による SUS316L の微細組織解析
利用した実施機関 / Support Institute
大阪大学 / Osaka Univ.
機関外・機関内の利用 / External or Internal Use
外部利用/External Use
技術領域 / Technology Area
【横断技術領域 / Cross-Technology Area】（主 / Main）計測・分析/Advanced Characterization（副 / Sub）-
【重要技術領域 / Important Technology Area】（主 / Main）マルチマテリアル化技術・次世代高分子マテリアル/Multi-material technologies / Next-generation high-molecular materials（副 / Sub）その他/Others
キーワード / Keywords
電子顕微鏡/Electron microscopy,集束イオンビーム/Focused ion beam,3D積層技術/ 3D lamination technology,電子顕微鏡/Electron microscopy
利用者と利用形態 / User and Support Type
利用者名（課題申請者）/ User Name (Project Applicant)
孫 飛
所属名 / Affiliation
名古屋大学
共同利用者氏名 / Names of Collaborators in Other Institutes Than Hub and Spoke Institutes
ARIM実施機関支援担当者 / Names of Collaborators in The Hub and Spoke Institutes
佐藤和久
利用形態 / Support Type
（主 / Main）共同研究/Joint Research（副 / Sub）-
利用した主な設備 / Equipment Used in This Project
OS-003：200kV原子分解能走査透過分析電子顕微鏡
OS-005：複合ビーム３次元加工・観察装置
報告書データ / Report
概要（目的・用途・実施内容）/ Abstract (Aim, Use Applications and Contents)
There are quite a lot of key challenges to overcome in science and technology for 3D printing. This raises the various types of microstructures that need to be well correlated with the process. Most microstructure characterization and analysis cover the range from macro- to sub-micrometer. However, few studies focus on the microstructure features down to nano/atomic scales. Various Nano-scaled microstructure induced by the superthermal field during the 3DP process remains unclear and needs to be fully investigated. Therefore, this study aims to explore nano/atomic scaled microstructure features for further achieving a great combination of processing and performance toward practical applications.
実験 / Experimental
The TEM specimens have been made by the FIB method with exact orientations and positions from the 3DPed bulk materials. High-resolution observation has been carried out using ARM200F to detect valuable microstructure features at nano-atomic scales.
結果と考察 / Results and Discussion
Novel nano-scaled modulated structures have been observed in the dislocation cells along [001] direction parallel to the laser scan direction and perpendicular to the build direction. The formation of the modulated structure combined with the slight elemental segregation results from the effective strain field in the dislocation cell interior and the strain by dislocation accumulation at the cell boundaries during the heating-cooling cycles.
図・表・数式 / Figures, Tables and Equations
Modulated structrue formed in the dislocation cell due to the strain localization and slight elemental segregation in SUS 316L by LPBF process
その他・特記事項（参考文献・謝辞等） / Remarks(References and Acknowledgements)
成果発表・成果利用 / Publication and Patents
論文・プロシーディング（DOIのあるもの） / DOI (Publication and Proceedings)
口頭発表、ポスター発表および、その他の論文 / Oral Presentations etc.
- 孫 飛, 佐藤 和久, et.al, "Modulated structure formation in dislocation cells in 316L stainless steel fabricated by laser powder bed fusion" 日本金属学会2023年春期(第172回)講演大会, 2023年3月7-10日, 東京大学駒場Iキャンパス
特許 / Patents
特許出願件数 / Number of Patent Applications：0件
特許登録件数 / Number of Registered Patents：0件