Document Type
Article
Publication Date
2-2024
Abstract
This study explored solid-state additive friction stir deposition (AFSD) as a modular manufacturing technology, with the aim of enabling a more rapid and streamlined on-site fabrication process for large meter-scale nuclear structural components with fully dense parts. Austenitic 316 stainless steel (SS) is an excellent candidate to demonstrate AFSD, as it is a commonly-used structural material for nuclear applications. The microstructural evolution and concomitant changes in mechanical properties after 5 MeV Fe++ ion irradiation were studied comprehensively via transmission electron microscopy and nanoindentation. AFSD-processed 316 SS led to a fine-grained and ultrafine-grained microstructure that resulted in a simultaneous increase in strength, ductility, toughness, irradiation resistance, and corrosion resistance. The AFSD samples did not exhibit voids even at 100 dpa dose at 600 °C. The enhanced radiation tolerance as compared to conventional SS was reasoned to be due to the high density of grain boundaries that act as irradiation-induced defect sinks.
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Publication Information
Agrawa, Priyanka; Shiau, Ching-Heng; Sharma, Aishani; Hu, Zhihan; Dubey, Megha; Lu, Yu; . . . and Mishra, Rajiv S. (2024). "Ion Irradiation and Examination of Additive Friction Stir Deposited 316 Stainless Steel". Materials & Design, 238, 112730. https://doi.org/10.1016/j.matdes.2024.112730