Small punch test to estimate the threshold stress in aggressive environments by incremental step loading
The present work is a relevant advance in the validation of the incremental step loading technique (ASTM F1624 standard) when applied to Small Punch tests (SPT) for the threshold load determination of medium- and high-strength steels in aggressive environments, as a novel alternative to conventional...
| Authors: | ; ; ; ; ; |
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| Format: | Article |
| Publication date: | 2024 |
| Country: | España |
| Institution: | Universidad de Cantabria (UC) |
| Repository: | UCrea Repositorio Abierto de la Universidad de Cantabria |
| Language: | English |
| OAI Identifier: | oai:repositorio.unican.es:10902/35285 |
| Online Access: | https://hdl.handle.net/10902/35285 |
| Access Level: | Open access |
| Keyword: | Threshold stress Small punch test Incremental step loading technique Aggressive environment Medium and high strength steels Hydrogen embrittlement |
| _version_ | 1878735604180582400 |
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| author | Arroyo Martínez, Borja|||0000-0003-3037-652X |
| author2 | Andrea Calvo, Laura Álvarez Laso, José Alberto|||0000-0003-0670-5100 Cicero González, Sergio|||0000-0002-3950-6071 Gutiérrez-Solana Salcedo, Federico|||0000-0003-2152-4148 Abarca González, Luis |
| author2_role | author author author author author |
| author_browse | Abarca González, Luis Andrea Calvo, Laura Arroyo Martínez, Borja|||0000-0003-3037-652X Cicero González, Sergio|||0000-0002-3950-6071 Gutiérrez-Solana Salcedo, Federico|||0000-0003-2152-4148 Álvarez Laso, José Alberto|||0000-0003-0670-5100 |
| author_facet | Arroyo Martínez, Borja|||0000-0003-3037-652X Andrea Calvo, Laura Álvarez Laso, José Alberto|||0000-0003-0670-5100 Cicero González, Sergio|||0000-0002-3950-6071 Gutiérrez-Solana Salcedo, Federico|||0000-0003-2152-4148 Abarca González, Luis |
| author_role | author |
| collection | UCrea Repositorio Abierto de la Universidad de Cantabria |
| description | The present work is a relevant advance in the validation of the incremental step loading technique (ASTM F1624 standard) when applied to Small Punch tests (SPT) for the threshold load determination of medium- and high-strength steels in aggressive environments, as a novel alternative to conventional time-consuming tests under constant load. It completes previous works by the authors on this topic, extending a methodology to estimate the threshold stress from SPT tests in aggressive environments, covering the whole range of hardness marked by ASTM F1624 as the main goal. This is achieved by calibrating a model of the material`s hardness by the use of a coefficient in function of it. For this purpose, four medium- and high-strength steels of 33, 35, 50 and 60 HRC (Hardness Rockwell C) are exposed to three different cathodic polarization hydrogen embrittlement environments of 1, 5 and 1mA/cm2 in H2SO4 acid electrolyte connected to a platinum anode. Threshold stresses in these circumstances are obtained by uniaxial specimens following ASTM F1624 and compared to their homologous threshold loads obtained by Small Punch tests according to the authors' original methodology proposal. Finally, the aforementioned model, consisting of a correlation based on composing an elastic and a plastic part, is calibrated for a hardness ranging 33-60 HRC, this being the main original contribution of this work; the elastic part is dependent just on the elastic-to-plastic transition SPT load, while the plastic part is ruled by a material hardness-dependent coefficient. This technique supposes an advance in engineering tools, due to its applicability in situations of material shortage, such as in-service components, welded joints, local areas, complex geometries, small thicknesses, etc., often present in aerospace, automotive or oil-gas, among others. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | ES_8002e7fbc2c6ed5f5fc38f29cccffe4f |
| institution | Universidad de Cantabria (UC) |
| instname_str | Universidad de Cantabria (UC) |
| language | eng |
| network_acronym_str | ES |
| network_name_str | España |
| oai_identifier_str | oai:repositorio.unican.es:10902/35285 |
| publishDate | 2024 |
| publishDateSort | 2024 |
| publisher | MDPI |
| publisherStr | MDPI |
| reponame_str | UCrea Repositorio Abierto de la Universidad de Cantabria |
| spelling | Small punch test to estimate the threshold stress in aggressive environments by incremental step loading Arroyo Martínez, Borja|||0000-0003-3037-652X Andrea Calvo, Laura Álvarez Laso, José Alberto|||0000-0003-0670-5100 Cicero González, Sergio|||0000-0002-3950-6071 Gutiérrez-Solana Salcedo, Federico|||0000-0003-2152-4148 Abarca González, Luis Threshold stress Small punch test Incremental step loading technique Aggressive environment Medium and high strength steels Hydrogen embrittlement The present work is a relevant advance in the validation of the incremental step loading technique (ASTM F1624 standard) when applied to Small Punch tests (SPT) for the threshold load determination of medium- and high-strength steels in aggressive environments, as a novel alternative to conventional time-consuming tests under constant load. It completes previous works by the authors on this topic, extending a methodology to estimate the threshold stress from SPT tests in aggressive environments, covering the whole range of hardness marked by ASTM F1624 as the main goal. This is achieved by calibrating a model of the material`s hardness by the use of a coefficient in function of it. For this purpose, four medium- and high-strength steels of 33, 35, 50 and 60 HRC (Hardness Rockwell C) are exposed to three different cathodic polarization hydrogen embrittlement environments of 1, 5 and 1mA/cm2 in H2SO4 acid electrolyte connected to a platinum anode. Threshold stresses in these circumstances are obtained by uniaxial specimens following ASTM F1624 and compared to their homologous threshold loads obtained by Small Punch tests according to the authors' original methodology proposal. Finally, the aforementioned model, consisting of a correlation based on composing an elastic and a plastic part, is calibrated for a hardness ranging 33-60 HRC, this being the main original contribution of this work; the elastic part is dependent just on the elastic-to-plastic transition SPT load, while the plastic part is ruled by a material hardness-dependent coefficient. This technique supposes an advance in engineering tools, due to its applicability in situations of material shortage, such as in-service components, welded joints, local areas, complex geometries, small thicknesses, etc., often present in aerospace, automotive or oil-gas, among others. This research was partially funded by CONSEJERÍA DE EDUCACIÓN, FORMACIÓN PROFESIONAL Y UNIVERSIDADES DEL GOBIERNO DE CANTABRIA, Project DESARROLLO DE UNA METODOLOGÍA PARA EVALUAR LA INTEGRIDAD ESTRUCTURAL DE CORDONES DE ACERO PARA PRETENSADO DAÑADOS EN SERVICIO EN VISTA DE SU VIDA REMANTENTE EN SERVICIO. (AYUDA FINANCIADA CONTRATO PROGRAMA GOB CANTABRIA-UC). MDPI https://hdl.handle.net/10902/35285 |
| spellingShingle | Small punch test to estimate the threshold stress in aggressive environments by incremental step loading Arroyo Martínez, Borja|||0000-0003-3037-652X Threshold stress Small punch test Incremental step loading technique Aggressive environment Medium and high strength steels Hydrogen embrittlement |
| title | Small punch test to estimate the threshold stress in aggressive environments by incremental step loading |
| title_full | Small punch test to estimate the threshold stress in aggressive environments by incremental step loading |
| title_fullStr | Small punch test to estimate the threshold stress in aggressive environments by incremental step loading |
| title_full_unstemmed | Small punch test to estimate the threshold stress in aggressive environments by incremental step loading |
| title_short | Small punch test to estimate the threshold stress in aggressive environments by incremental step loading |
| title_sort | Small punch test to estimate the threshold stress in aggressive environments by incremental step loading |
| topic | Threshold stress Small punch test Incremental step loading technique Aggressive environment Medium and high strength steels Hydrogen embrittlement |
| topic_facet | Threshold stress Small punch test Incremental step loading technique Aggressive environment Medium and high strength steels Hydrogen embrittlement |
| url | https://hdl.handle.net/10902/35285 |