2024-09-10 パシフィック・ノースウェスト国立研究所(PNNL)
＜関連情報＞
- https://www.pnnl.gov/publications/alternate-approach-fabricating-strengthened-steel
- https://www.sciencedirect.com/science/article/abs/pii/S0022311524001788
コールドスプレーと摩擦攪拌加工による酸化物分散強化（ODS）鋼板の製造 Manufacturing Oxide Dispersion Strengthened (ODS) steel plate via cold spray and friction stir processing
Xiang Wang, Dalong Zhang, Jens T. Darsell, Kenneth A. Ross, Xiaolong Ma, Jia Liu, Tingkun Liu, Ramprashad Prabhakaran, Lan Li, Iver E. Anderson, Wahyu Setyawan
Journal of Nuclear Materials Available online: 8 April 2024
DOI:https://doi.org/10.1016/j.jnucmat.2024.155076
Graphical abstract
Highlights
- A possible alternative approach combining cold spray deposition and friction stir processing was employed to fabricate the oxide dispersion strengthened (ODS) steel plate.
- The as-fabricated ODS steel plate showed a uniform microstructure.
- Well-disperse nano-sized oxide particles were formed in the newly fabricated ODS steel.
Abstract
Oxide dispersion strengthened (ODS) steels, traditionally fabricated by ball milling and conventional powder metallurgy techniques to achieve bulk form, followed by intricate rolling and thermal treatment steps to achieve plate or sheet form. Here, we present a novel processing route that combines cold spray (CS) with friction stir processing (FSP) to manufacture ODS steel plate directly from gas atomization reaction synthesis (GARS)-prepared powder, thus no rolling steps involved. Microstructural and mechanical characterizations were performed to assess the quality and properties of the resulting ODS steel plate. Our findings demonstrate that the slightly porous CS deposited layer was fully consolidated after FSP, yielding a fully dense ODS steel plate that exhibited a favorable tradeoff between strength and ductility upon extraction from the substrate. Furthermore, through microstructural analysis, we revealed the presence of an appreciable density (∼1022/m3) of nano-sized oxide particles, with the majority being smaller than 5 nm via the combined CS + FSP fabrication route. This work serves as a first proof-of-concept demonstration of the manufacturing approach described herein, offering a possible alternative route for producing ODS steel plates.
