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Generalized Model for IGC Growth in Aluminum Alloys

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/36522

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Title: Generalized Model for IGC Growth in Aluminum Alloys
Creators: Zhao, Shang; Wolfe, Douglas A.; Huang, Tsai-Shang; Frankel, Gerald S.
Keywords: brick wall model
intergranular corrosion rate
foil penetration technique
Issue Date: 2007
Citation: Zhao, Shang; Wolfe, Douglas A.; Huang, Tsai-Shang; Frankel, Gerald S. "Generalized Model for IGC Growth in Aluminum Alloys," Journal of Statistical Planning and Inference, v. 137, 2007, pp. 2405-2412.
Abstract: A generalized brick wall model is developed to describe intergranular corrosion in Equi-axedAA7178-T6 and Wingskin AA7178-T6 aluminum alloys. The intergranular corrosion rate is highly related to grain size and shape. High strength aluminum alloys are often elongated and anisotropic, with the fastest nominal IGC growth rate in the longitudinal direction (L) or long transverse direction (T) and the slowest in the short transverse direction (S). We propose a three-way intersection model and use it to simulate the corrosion kinetics for each direction. With a proper combination of model parameters, the generalized IGC model provides a good fit to experimental data developed by the foil penetration technique.
URI: http://hdl.handle.net/1811/36522
ISSN: 0378-3758 (print)
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