Evaluation of the Effect of Dual-Stage Aging and RRA on the Hardening and Corrosion Resistance of AW7075 Alloy
The corrosion resistance of the AW7075 alloy after RRA treatment was evaluated. The corrosion rate in the NSS test was assessed and the electrochemical parameters were determined. The results were compared with the results obtained for the alloy subjected to conventional aging (T6) and dual-stage ag...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-03-01
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| Series: | Corrosion and Materials Degradation |
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| Online Access: | https://www.mdpi.com/2624-5558/3/1/8 |
| _version_ | 1827649506032746496 |
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| author | Aleksandra Ładak Mateusz Cichoń Marzena Lachowicz |
| author_facet | Aleksandra Ładak Mateusz Cichoń Marzena Lachowicz |
| author_sort | Aleksandra Ładak |
| collection | DOAJ |
| description | The corrosion resistance of the AW7075 alloy after RRA treatment was evaluated. The corrosion rate in the NSS test was assessed and the electrochemical parameters were determined. The results were compared with the results obtained for the alloy subjected to conventional aging (T6) and dual-stage aging (DA). In order to determine the state of alloy hardening, the tests were carried out simultaneously with the material hardness measurements and microscopic examinations. The hardness of the AW7075 alloy increased in the following order: DA < T6 < RRA. The tests revealed that the achieved increase in strengthening was correlated with the preservation of high resistance to general corrosion of the alloy after RRA treatment. After the corrosion tests, SEM microscopic observations were also carried out to determine the corrosion features. The corrosion rate can be arranged in the following order: RRA < T6 ≈ DA. At the same time, the alloy after RRA was characterized by the lowest value of the corrosion potential and the open circuit. The corrosion potential value can be presented in increasing order: RRA < T6 ≈ DA. The corrosion behavior of the aluminum alloy after dual-stage aging was similar to that of T6. However, it was accompanied by a decline in hardening. |
| first_indexed | 2024-03-09T19:58:41Z |
| format | Article |
| id | doaj.art-1a88e55332ba49cdbe95b06b74acf8d8 |
| institution | Directory Open Access Journal |
| issn | 2624-5558 |
| language | English |
| last_indexed | 2024-03-09T19:58:41Z |
| publishDate | 2022-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Corrosion and Materials Degradation |
| spelling | doaj.art-1a88e55332ba49cdbe95b06b74acf8d82023-11-24T00:49:29ZengMDPI AGCorrosion and Materials Degradation2624-55582022-03-013114215910.3390/cmd3010008Evaluation of the Effect of Dual-Stage Aging and RRA on the Hardening and Corrosion Resistance of AW7075 AlloyAleksandra Ładak0Mateusz Cichoń1Marzena Lachowicz2Faculty of Mechanical Engineering, Wroclaw University of Science and Technology, Łukasiewicza 5, 50-371 Wroclaw, PolandFaculty of Mechanical Engineering, Wroclaw University of Science and Technology, Łukasiewicza 5, 50-371 Wroclaw, PolandDepartment of Metal Forming, Welding Technology and Metrology, Wroclaw University of Science and Technology, Łukasiewicza 7-9, 50-371 Wroclaw, PolandThe corrosion resistance of the AW7075 alloy after RRA treatment was evaluated. The corrosion rate in the NSS test was assessed and the electrochemical parameters were determined. The results were compared with the results obtained for the alloy subjected to conventional aging (T6) and dual-stage aging (DA). In order to determine the state of alloy hardening, the tests were carried out simultaneously with the material hardness measurements and microscopic examinations. The hardness of the AW7075 alloy increased in the following order: DA < T6 < RRA. The tests revealed that the achieved increase in strengthening was correlated with the preservation of high resistance to general corrosion of the alloy after RRA treatment. After the corrosion tests, SEM microscopic observations were also carried out to determine the corrosion features. The corrosion rate can be arranged in the following order: RRA < T6 ≈ DA. At the same time, the alloy after RRA was characterized by the lowest value of the corrosion potential and the open circuit. The corrosion potential value can be presented in increasing order: RRA < T6 ≈ DA. The corrosion behavior of the aluminum alloy after dual-stage aging was similar to that of T6. However, it was accompanied by a decline in hardening.https://www.mdpi.com/2624-5558/3/1/8structural corrosionRRA treatmentdual-stage agingheat treatmentcorrosion resistancehardness |
| spellingShingle | Aleksandra Ładak Mateusz Cichoń Marzena Lachowicz Evaluation of the Effect of Dual-Stage Aging and RRA on the Hardening and Corrosion Resistance of AW7075 Alloy Corrosion and Materials Degradation structural corrosion RRA treatment dual-stage aging heat treatment corrosion resistance hardness |
| title | Evaluation of the Effect of Dual-Stage Aging and RRA on the Hardening and Corrosion Resistance of AW7075 Alloy |
| title_full | Evaluation of the Effect of Dual-Stage Aging and RRA on the Hardening and Corrosion Resistance of AW7075 Alloy |
| title_fullStr | Evaluation of the Effect of Dual-Stage Aging and RRA on the Hardening and Corrosion Resistance of AW7075 Alloy |
| title_full_unstemmed | Evaluation of the Effect of Dual-Stage Aging and RRA on the Hardening and Corrosion Resistance of AW7075 Alloy |
| title_short | Evaluation of the Effect of Dual-Stage Aging and RRA on the Hardening and Corrosion Resistance of AW7075 Alloy |
| title_sort | evaluation of the effect of dual stage aging and rra on the hardening and corrosion resistance of aw7075 alloy |
| topic | structural corrosion RRA treatment dual-stage aging heat treatment corrosion resistance hardness |
| url | https://www.mdpi.com/2624-5558/3/1/8 |
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