Fatigue Behavior of Super Duplex Stainless Steel Exposed in Natural Seawater Under Cathodic Protection
Under operating conditions, alternated loading and fatigue are encountered, controlling the durability and safety of components and structures made of super duplex stainless steel (SDSS). In particular, the use of a cathodic protection (CP) system to protect the structure against corrosion can induc...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2022-01-01
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| Series: | Frontiers in Materials |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmats.2022.826189/full |
| _version_ | 1819279093244362752 |
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| author | Flavien Vucko Geoffrey Ringot Dominique Thierry Dominique Thierry Nicolas Larché |
| author_facet | Flavien Vucko Geoffrey Ringot Dominique Thierry Dominique Thierry Nicolas Larché |
| author_sort | Flavien Vucko |
| collection | DOAJ |
| description | Under operating conditions, alternated loading and fatigue are encountered, controlling the durability and safety of components and structures made of super duplex stainless steel (SDSS). In particular, the use of a cathodic protection (CP) system to protect the structure against corrosion can induce hydrogen charging of the SDSS. Thus, the aim of this study was to investigate the sensitivity of some industrial products made of SDSS 2507 (UNS S32750), without artificial thermal aging, under test conditions as close as possible to real environments. In situ fatigue tests under alternated 4-point bending conditions were conducted in natural seawater with and without CP. The fatigue behavior was evaluated as a function of environmental parameters, such as temperature, and material parameters, particularly the austenite spacing and microstructure around orbital welds by Tungsten Inert Gas (TIG) welding and stress concentrations, through the presence of surface defects. The fatigue life obtained in air or in seawater at the open circuit potential (OCP) was rather similar. Fatigue life enhancement was systematically observed under CP particularly in the range of low applied load, despite evidence of brittle failure on the fracture surfaces of samples tested under CP. The data suggest immunity of the SDSS to hydrogen embrittlement under the present experimental conditions of fatigue testing. |
| first_indexed | 2024-12-24T00:22:25Z |
| format | Article |
| id | doaj.art-071aba36535b4fc196b8ef3fda2e2181 |
| institution | Directory Open Access Journal |
| issn | 2296-8016 |
| language | English |
| last_indexed | 2024-12-24T00:22:25Z |
| publishDate | 2022-01-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Materials |
| spelling | doaj.art-071aba36535b4fc196b8ef3fda2e21812022-12-21T17:24:33ZengFrontiers Media S.A.Frontiers in Materials2296-80162022-01-01910.3389/fmats.2022.826189826189Fatigue Behavior of Super Duplex Stainless Steel Exposed in Natural Seawater Under Cathodic ProtectionFlavien Vucko0Geoffrey Ringot1Dominique Thierry2Dominique Thierry3Nicolas Larché4French Corrosion Institute—RISE, Brest, FranceFrench Corrosion Institute—RISE, Brest, FranceFrench Corrosion Institute—RISE, Brest, FranceRISE Research Institute of Sweden, Kista, SwedenFrench Corrosion Institute—RISE, Brest, FranceUnder operating conditions, alternated loading and fatigue are encountered, controlling the durability and safety of components and structures made of super duplex stainless steel (SDSS). In particular, the use of a cathodic protection (CP) system to protect the structure against corrosion can induce hydrogen charging of the SDSS. Thus, the aim of this study was to investigate the sensitivity of some industrial products made of SDSS 2507 (UNS S32750), without artificial thermal aging, under test conditions as close as possible to real environments. In situ fatigue tests under alternated 4-point bending conditions were conducted in natural seawater with and without CP. The fatigue behavior was evaluated as a function of environmental parameters, such as temperature, and material parameters, particularly the austenite spacing and microstructure around orbital welds by Tungsten Inert Gas (TIG) welding and stress concentrations, through the presence of surface defects. The fatigue life obtained in air or in seawater at the open circuit potential (OCP) was rather similar. Fatigue life enhancement was systematically observed under CP particularly in the range of low applied load, despite evidence of brittle failure on the fracture surfaces of samples tested under CP. The data suggest immunity of the SDSS to hydrogen embrittlement under the present experimental conditions of fatigue testing.https://www.frontiersin.org/articles/10.3389/fmats.2022.826189/fullsuper duplex stainless steelhydrogennatural seawaterfatiguecathodic protection (CP) |
| spellingShingle | Flavien Vucko Geoffrey Ringot Dominique Thierry Dominique Thierry Nicolas Larché Fatigue Behavior of Super Duplex Stainless Steel Exposed in Natural Seawater Under Cathodic Protection Frontiers in Materials super duplex stainless steel hydrogen natural seawater fatigue cathodic protection (CP) |
| title | Fatigue Behavior of Super Duplex Stainless Steel Exposed in Natural Seawater Under Cathodic Protection |
| title_full | Fatigue Behavior of Super Duplex Stainless Steel Exposed in Natural Seawater Under Cathodic Protection |
| title_fullStr | Fatigue Behavior of Super Duplex Stainless Steel Exposed in Natural Seawater Under Cathodic Protection |
| title_full_unstemmed | Fatigue Behavior of Super Duplex Stainless Steel Exposed in Natural Seawater Under Cathodic Protection |
| title_short | Fatigue Behavior of Super Duplex Stainless Steel Exposed in Natural Seawater Under Cathodic Protection |
| title_sort | fatigue behavior of super duplex stainless steel exposed in natural seawater under cathodic protection |
| topic | super duplex stainless steel hydrogen natural seawater fatigue cathodic protection (CP) |
| url | https://www.frontiersin.org/articles/10.3389/fmats.2022.826189/full |
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