Effect of Load on the Corrosion Behavior of Friction Stir Welded AA 7075-T6 Aluminum Alloy
The paper focuses on the corrosion behavior of aluminum joints made by friction stir welding as a function of loading conditions. A four-points bend-beam test, constant loading test, and slow strain-rate test were carried out on AA 7075-T6 alloy in aerated NaCl 35g/L solution at room temperature mon...
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doaj-04f7a739c28b41b6a0ceb1294dd22d912020-11-25T03:28:59ZengMDPI AGMaterials1996-19442020-06-01132600260010.3390/ma13112600Effect of Load on the Corrosion Behavior of Friction Stir Welded AA 7075-T6 Aluminum AlloyMarina Cabrini0Sara Bocchi1Gianluca D’Urso2Claudio Giardini3Sergio Lorenzi4Cristian Testa5Tommaso Pastore6Department of Engineering and Applied Sciences, University of Bergamo, 24044 Dalmine (BG), ItalyDepartment of Management, Information and Production Engineering, University of Bergamo, 24044 Dalmine (BG), ItalyDepartment of Management, Information and Production Engineering, University of Bergamo, 24044 Dalmine (BG), ItalyDepartment of Management, Information and Production Engineering, University of Bergamo, 24044 Dalmine (BG), ItalyDepartment of Engineering and Applied Sciences, University of Bergamo, 24044 Dalmine (BG), ItalyDepartment of Engineering and Applied Sciences, University of Bergamo, 24044 Dalmine (BG), ItalyDepartment of Engineering and Applied Sciences, University of Bergamo, 24044 Dalmine (BG), ItalyThe paper focuses on the corrosion behavior of aluminum joints made by friction stir welding as a function of loading conditions. A four-points bend-beam test, constant loading test, and slow strain-rate test were carried out on AA 7075-T6 alloy in aerated NaCl 35g/L solution at room temperature monitoring the free corrosion potential. The penetration depth of the intergranular attack was deeper after the four-point bent-beam tests compared to all the other testing techniques. Preferential dissolution along the grain boundaries was found in the heat-affected zone and the attack follows the elongated grains structure along the rolling direction. However, no stress-corrosion cracking phenomena were detected. No relevant stress corrosion cracking (SCC) crack embryos propagation was noticed under uniaxial tensile tests—both constant loading and slow strain-rate tests—manly due to the high dissolution rate occurring at the crack tip which promoted premature shear ruptures.https://www.mdpi.com/1996-1944/13/11/2600corrosionstress-corrosion crackingfriction stir welding (FSW)AA7075 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Marina Cabrini Sara Bocchi Gianluca D’Urso Claudio Giardini Sergio Lorenzi Cristian Testa Tommaso Pastore |
spellingShingle |
Marina Cabrini Sara Bocchi Gianluca D’Urso Claudio Giardini Sergio Lorenzi Cristian Testa Tommaso Pastore Effect of Load on the Corrosion Behavior of Friction Stir Welded AA 7075-T6 Aluminum Alloy Materials corrosion stress-corrosion cracking friction stir welding (FSW) AA7075 |
author_facet |
Marina Cabrini Sara Bocchi Gianluca D’Urso Claudio Giardini Sergio Lorenzi Cristian Testa Tommaso Pastore |
author_sort |
Marina Cabrini |
title |
Effect of Load on the Corrosion Behavior of Friction Stir Welded AA 7075-T6 Aluminum Alloy |
title_short |
Effect of Load on the Corrosion Behavior of Friction Stir Welded AA 7075-T6 Aluminum Alloy |
title_full |
Effect of Load on the Corrosion Behavior of Friction Stir Welded AA 7075-T6 Aluminum Alloy |
title_fullStr |
Effect of Load on the Corrosion Behavior of Friction Stir Welded AA 7075-T6 Aluminum Alloy |
title_full_unstemmed |
Effect of Load on the Corrosion Behavior of Friction Stir Welded AA 7075-T6 Aluminum Alloy |
title_sort |
effect of load on the corrosion behavior of friction stir welded aa 7075-t6 aluminum alloy |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2020-06-01 |
description |
The paper focuses on the corrosion behavior of aluminum joints made by friction stir welding as a function of loading conditions. A four-points bend-beam test, constant loading test, and slow strain-rate test were carried out on AA 7075-T6 alloy in aerated NaCl 35g/L solution at room temperature monitoring the free corrosion potential. The penetration depth of the intergranular attack was deeper after the four-point bent-beam tests compared to all the other testing techniques. Preferential dissolution along the grain boundaries was found in the heat-affected zone and the attack follows the elongated grains structure along the rolling direction. However, no stress-corrosion cracking phenomena were detected. No relevant stress corrosion cracking (SCC) crack embryos propagation was noticed under uniaxial tensile tests—both constant loading and slow strain-rate tests—manly due to the high dissolution rate occurring at the crack tip which promoted premature shear ruptures. |
topic |
corrosion stress-corrosion cracking friction stir welding (FSW) AA7075 |
url |
https://www.mdpi.com/1996-1944/13/11/2600 |
work_keys_str_mv |
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