Abstract
Structural materials are subjected to combinations of stress and corrosive environments that work synergistically to cause premature failure. Therefore, studies on the combined effect of stress and corrosive environments on material behavior are required. Existing studies have been performed in two dimensions that are inadequate for full comprehension of the three-dimensional (3D) processes related to stress corrosion cracking (SCC) and corrosion-fatigue (CF) behavior. Recently, x-ray synchrotron tomography has evolved as an excellent technique to obtain the microstructure in 3D. Moreover, being nondestructive in nature, x-ray synchrotron tomography is well suited to study the evolution of microstructure with time (4D, or fourth dimension in time). This article presents our recent 4D studies on SCC and CF of Al 7075 alloys using x-ray synchrotron tomography.
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Acknowledgements
The authors are grateful for the financial support from the Office of Naval Research (ONR) under Contract Number N000141010350 (Drs. W. Mullins and A.K. Vasudevan, Program Managers).
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Singh, S.S., Stannard, T.J., Xiao, X. et al. In Situ X-ray Microtomography of Stress Corrosion Cracking and Corrosion Fatigue in Aluminum Alloys. JOM 69, 1404–1414 (2017). https://doi.org/10.1007/s11837-017-2413-8
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DOI: https://doi.org/10.1007/s11837-017-2413-8