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.

(2020). Effect of load on the corrosion behavior of friction stir welded AA 7075-T6 aluminum alloy [journal article - articolo]. In MATERIALS. Retrieved from http://hdl.handle.net/10446/161394

Effect of load on the corrosion behavior of friction stir welded AA 7075-T6 aluminum alloy

Cabrini, Marina;Bocchi, Sara;D'Urso, Gianluca;Giardini, Claudio;Lorenzi, Sergio;Testa, Cristian;Pastore, Tommaso
2020

Abstract

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.
articolo
Cabrini, Marina; Bocchi, Sara; D'Urso, Gianluca; Giardini, Claudio; Lorenzi, Sergio; Testa, Cristian; Pastore, Tommaso
(2020). Effect of load on the corrosion behavior of friction stir welded AA 7075-T6 aluminum alloy [journal article - articolo]. In MATERIALS. Retrieved from http://hdl.handle.net/10446/161394
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10446/161394
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