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Effect of the microstructure generated by Repetitive Corrugation and Straightening (RCS) process on the mechanical properties and stress corrosion cracking of Al-7075 alloy.

Romero-Resendiz, L., Amigó-Borrás, V., Vicente-Escuder, A., Elizalde, S., Cabrera, J. M., Pineda-Ruiz, D., Figueroa, I. A. and Gonzalez, G., 2021. Effect of the microstructure generated by Repetitive Corrugation and Straightening (RCS) process on the mechanical properties and stress corrosion cracking of Al-7075 alloy. Journal of Materials Research and Technology, 15, 4564-4572.

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DOI: 10.1016/j.jmrt.2021.10.043

Abstract

This study discussed the effect of the heterogeneous microstructure generated through the Repetitive Corrugation and Straightening (RCS) process on the mechanical and stress corrosion cracking behavior of the AA7075. As a result of the RCS process, significant grain refinement was obtained. The average grain size ranged from 126 to 59 μm, for the initial condition and 4 RCS passes, respectively. The yield strength and hardness increased 170% and 15% from the initial pass, remaining almost constant afterward. The evaluation of stress corrosion cracking showed a decrement in the number of cracks of 21.6% and 23.5% between the initial condition and fourth RCS passes. The cracking and pitting corrosion were the dominant mechanisms in the tested samples. The mechanical and corrosion results were also discussed in terms of the microstructural features.

Item Type:Article
ISSN:2238-7854
Uncontrolled Keywords:Al–alloy; Microstructure; Stress corrosion cracking; Grain boundaries; Plastic deformation
Group:Faculty of Science & Technology
ID Code:39389
Deposited By: Symplectic RT2
Deposited On:18 Jan 2024 08:30
Last Modified:18 Jan 2024 08:30

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