Fatigue Study of the Pre-Corroded 6082-T6 Aluminum Alloy in Saline Atmosphere
This work studies the influence of the saline atmospheric corrosion on the fatigue strength of 6061-T6 aluminum alloy. For this purpose, this alloy was subjected to tests in a salt spray corrosion chamber at different exposure times (1, 2, and 3 months) according to ASTM B117 standard. The morpholog...
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MDPI AG
2020-09-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/10/9/1260 |
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| author | Alejandro Fernández Muñoz José Luis Mier Buenhombre Ana Isabel García-Diez Carolina Camba Fabal Juan José Galán Díaz |
| author_facet | Alejandro Fernández Muñoz José Luis Mier Buenhombre Ana Isabel García-Diez Carolina Camba Fabal Juan José Galán Díaz |
| author_sort | Alejandro Fernández Muñoz |
| collection | DOAJ |
| description | This work studies the influence of the saline atmospheric corrosion on the fatigue strength of 6061-T6 aluminum alloy. For this purpose, this alloy was subjected to tests in a salt spray corrosion chamber at different exposure times (1, 2, and 3 months) according to ASTM B117 standard. The morphological study of the pits was carried out by confocal microscopy. Subsequently, fatigue tests were performed at variable stresses whose maximum stress (<i>S<sub>max</sub></i>) was between 30% and 95% of the yield strength (<i>S</i><sub>0</sub>) in order to keep them within the zone of elastic behavior of the material. Data were analyzed using the Basquin equation and the maximum likelihood function method. The results show a similar decrease in the conventional fatigue limit (2 × 10<sup>6</sup> cycles) after one month (98 MPa) and two months (91 MPa) of corrosion. After three months of corrosion, the material showed a very important reduction in the fatigue limit (68 MPa) with respect to the uncorroded material (131 MPa). The data of <i>S<sub>e</sub></i>/<i>S</i><sub>0</sub> (fatigue limit/yield strength) versus the ratio <i>P<sub>m</sub></i>/<i>D<sub>m</sub></i> (pit average depth/pit diameter at zero depth) can be fitted to a logarithmic curve. |
| first_indexed | 2024-03-10T16:14:37Z |
| format | Article |
| id | doaj.art-7ee478ffea454c7886405d38b86029b8 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T16:14:37Z |
| publishDate | 2020-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-7ee478ffea454c7886405d38b86029b82023-11-20T14:09:42ZengMDPI AGMetals2075-47012020-09-01109126010.3390/met10091260Fatigue Study of the Pre-Corroded 6082-T6 Aluminum Alloy in Saline AtmosphereAlejandro Fernández Muñoz0José Luis Mier Buenhombre1Ana Isabel García-Diez2Carolina Camba Fabal3Juan José Galán Díaz4Navantia, Polígono Astilleros, S/N, 11519 Puerto Real, SpainEscuela Politécnica Superior, University of A Coruña, Mendizábal s/n, 15403 Ferrol, SpainEscuela Politécnica Superior, University of A Coruña, Mendizábal s/n, 15403 Ferrol, SpainEscuela Politécnica Superior, University of A Coruña, Mendizábal s/n, 15403 Ferrol, SpainEscuela Politécnica Superior, University of A Coruña, Mendizábal s/n, 15403 Ferrol, SpainThis work studies the influence of the saline atmospheric corrosion on the fatigue strength of 6061-T6 aluminum alloy. For this purpose, this alloy was subjected to tests in a salt spray corrosion chamber at different exposure times (1, 2, and 3 months) according to ASTM B117 standard. The morphological study of the pits was carried out by confocal microscopy. Subsequently, fatigue tests were performed at variable stresses whose maximum stress (<i>S<sub>max</sub></i>) was between 30% and 95% of the yield strength (<i>S</i><sub>0</sub>) in order to keep them within the zone of elastic behavior of the material. Data were analyzed using the Basquin equation and the maximum likelihood function method. The results show a similar decrease in the conventional fatigue limit (2 × 10<sup>6</sup> cycles) after one month (98 MPa) and two months (91 MPa) of corrosion. After three months of corrosion, the material showed a very important reduction in the fatigue limit (68 MPa) with respect to the uncorroded material (131 MPa). The data of <i>S<sub>e</sub></i>/<i>S</i><sub>0</sub> (fatigue limit/yield strength) versus the ratio <i>P<sub>m</sub></i>/<i>D<sub>m</sub></i> (pit average depth/pit diameter at zero depth) can be fitted to a logarithmic curve.https://www.mdpi.com/2075-4701/10/9/12606061-T6 aluminum alloypittingconfocal microscopyfatigueBasquin’s equationmaximum likelihood method |
| spellingShingle | Alejandro Fernández Muñoz José Luis Mier Buenhombre Ana Isabel García-Diez Carolina Camba Fabal Juan José Galán Díaz Fatigue Study of the Pre-Corroded 6082-T6 Aluminum Alloy in Saline Atmosphere Metals 6061-T6 aluminum alloy pitting confocal microscopy fatigue Basquin’s equation maximum likelihood method |
| title | Fatigue Study of the Pre-Corroded 6082-T6 Aluminum Alloy in Saline Atmosphere |
| title_full | Fatigue Study of the Pre-Corroded 6082-T6 Aluminum Alloy in Saline Atmosphere |
| title_fullStr | Fatigue Study of the Pre-Corroded 6082-T6 Aluminum Alloy in Saline Atmosphere |
| title_full_unstemmed | Fatigue Study of the Pre-Corroded 6082-T6 Aluminum Alloy in Saline Atmosphere |
| title_short | Fatigue Study of the Pre-Corroded 6082-T6 Aluminum Alloy in Saline Atmosphere |
| title_sort | fatigue study of the pre corroded 6082 t6 aluminum alloy in saline atmosphere |
| topic | 6061-T6 aluminum alloy pitting confocal microscopy fatigue Basquin’s equation maximum likelihood method |
| url | https://www.mdpi.com/2075-4701/10/9/1260 |
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