Heat treatment effects on the corrosion performance of wire arc additively manufactured ER316LSi stainless steel
Heat treatment effects on the corrosion performance of wire arc additively manufactured ER316LSi stainless steel
Corrosion performance of a multi-layered ER316LSi wall deposited using wire and arc additive manufacturing was studied in the as-deposited condition and after stress relief heat treatment at 900 °C, in 3.5 wt% NaCl solution. It was found that the heat treatment is not suitable for WAAM ER316LSi components due to the complete transformation of the delta ferrite into sigma decreasing the corrosion performance. The delta ferrite to sigma transformation during heat treatment was facilitated by the cyclic reheating of the part during deposition. The electrochemical response of as-deposited WAAM differed from a wrought alloy with similar composition and linked to microstructural differences: as-deposited WAAM had a higher pitting potential due to the absence of sulfide inclusions and increased metastable-like activity due to the presence of the secondary delta ferrite causing elemental segregation.
WAAM, Stainless steel, 316L, Additive manufacturing, Corrosion performance, Heat treatment
Penot, Corentin
2b691560-7158-44b1-8c0a-011640d3ab53
Wharton, Julian
965a38fd-d2bc-4a19-a08c-2d4e036aa96b
Addison, Adrian
12106cdd-e323-40a3-9307-0df71344573a
Wang, Yikun
81c82b50-4aa9-4352-acc9-513eea04674b
Lu, Qing
5cddfbdc-22fa-4c01-8387-b7ad82d8071b
9 June 2023
Penot, Corentin
2b691560-7158-44b1-8c0a-011640d3ab53
Wharton, Julian
965a38fd-d2bc-4a19-a08c-2d4e036aa96b
Addison, Adrian
12106cdd-e323-40a3-9307-0df71344573a
Wang, Yikun
81c82b50-4aa9-4352-acc9-513eea04674b
Lu, Qing
5cddfbdc-22fa-4c01-8387-b7ad82d8071b
Penot, Corentin, Wharton, Julian, Addison, Adrian, Wang, Yikun and Lu, Qing
(2023)
Heat treatment effects on the corrosion performance of wire arc additively manufactured ER316LSi stainless steel.
npj Materials Degradation, 7, [48].
(doi:10.1038/s41529-023-00359-0).
Abstract
Corrosion performance of a multi-layered ER316LSi wall deposited using wire and arc additive manufacturing was studied in the as-deposited condition and after stress relief heat treatment at 900 °C, in 3.5 wt% NaCl solution. It was found that the heat treatment is not suitable for WAAM ER316LSi components due to the complete transformation of the delta ferrite into sigma decreasing the corrosion performance. The delta ferrite to sigma transformation during heat treatment was facilitated by the cyclic reheating of the part during deposition. The electrochemical response of as-deposited WAAM differed from a wrought alloy with similar composition and linked to microstructural differences: as-deposited WAAM had a higher pitting potential due to the absence of sulfide inclusions and increased metastable-like activity due to the presence of the secondary delta ferrite causing elemental segregation.
Text
s41529-023-00359-0
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More information
Accepted/In Press date: 5 May 2023
e-pub ahead of print date: 9 June 2023
Published date: 9 June 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).
Keywords:
WAAM, Stainless steel, 316L, Additive manufacturing, Corrosion performance, Heat treatment
Identifiers
Local EPrints ID: 477903
URI: http://eprints.soton.ac.uk/id/eprint/477903
ISSN: 2397-2106
PURE UUID: 6ba08e43-e94e-43ae-be12-371f845473b1
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Date deposited: 16 Jun 2023 16:33
Last modified: 17 Mar 2024 02:46
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Contributors
Author:
Corentin Penot
Author:
Adrian Addison
Author:
Yikun Wang
Author:
Qing Lu
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