Interpass temperature effects on WAAM ER316L stainless steel corrosion using potentiostatic pulse tests

Penot, Corentin, Wharton, Julian, Addison, Adrian, Wang, Yikun and Lu, Qing (2023) Interpass temperature effects on WAAM ER316L stainless steel corrosion using potentiostatic pulse tests. npj Materials Degradation, 7 (1), [89]. (doi:10.1038/s41529-023-00408-8).

Record type: Article

Abstract

The effect of interpass temperature on the microstructure and pit nucleation behaviour in wire and arc additive manufacturing (WAAM) deposited ER316L stainless steel is investigated. Lowering the interpass temperature increases the ferrite content and decreases the sigma phase precipitation. Potentiostatic pulse measurements show that the WAAM ER316L pits develop predominantly near sigma phases and have higher pit density compared to a wrought 316L (UNS S31600). The pitting susceptibility of WAAM ER316L increases with increasing interpass temperature due to the precipitation of larger sigma phase enhancing the elemental segregation.

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Accepted/In Press date: 23 October 2023

e-pub ahead of print date: 11 November 2023

Published date: December 2023

Additional Information: Funding Information: This work was made possible by the sponsorship and support of Lloyd’s Register Foundation. Lloyd’s Register Foundation helps to protect life and property by supporting engineering-related education, public engagement and the application of research. The work was enabled through, and undertaken at, the national Centre for Advanced Tribology at Southampton (nCATS), and the National Structural Integrity Research Centre (NSIRC), a postgraduate engineering facility for industry-led research into structural integrity established and managed by TWI through a network of both national and international Universities. The authors would also like to acknowledge the Lloyd’s Register Industrial Mentor Mr Adam Saxty for his technical input. For the purpose of open access, the author has applied a CC BY public copyright licence to any Author Accepted Manuscript version arising from this submission. Funding Information: This work was made possible by the sponsorship and support of Lloyd’s Register Foundation. Lloyd’s Register Foundation helps to protect life and property by supporting engineering-related education, public engagement and the application of research. The work was enabled through, and undertaken at, the national Centre for Advanced Tribology at Southampton (nCATS), and the National Structural Integrity Research Centre (NSIRC), a postgraduate engineering facility for industry-led research into structural integrity established and managed by TWI through a network of both national and international Universities. The authors would also like to acknowledge the Lloyd’s Register Industrial Mentor Mr Adam Saxty for his technical input. For the purpose of open access, the author has applied a CC BY public copyright licence to any Author Accepted Manuscript version arising from this submission. Publisher Copyright: © 2023, The Author(s).