A series of stress corrosion cracking(SCC) tests were carried out on the peakaged Al-Li-Cu 2090 alloy plates to examine the effect of zinc addition on static- and dynamic-SCC properties. The alloy with 0.7% zinc addition showed an improved static-SCC resistance in the S-L direction. The reference 2090 alloy exposed to aqueous sodium chloride solution exhibited an accelerated dynamic-SCC growth in the T-L direction, relative to exposure to laboratory air, while the alloy with zinc addition revealed a reduced environment-sensitive crack growth. The dynamic-SCC was transgranular, showing a repetitive saw-tooth crack path, which is assumed resulting from localized planar slip associated with{110}<211>texture and inhomogeneous distribution of T1-precipitates. It was found that Zn addition is effective in reducing the slip planarity and preferential dissolution along slip bands.
JSME international journal. Ser. 1, Solid mechanics, strength of materials
JSME international journal. Ser. A, Mechanics and material engineering
JSME international journal. Ser. 3, Vibration, control engineering, engineering for industry
JSME international journal. Ser. C, Dynamics, control, robotics, design and manufacturing
JSME International Journal Series C Mechanical Systems, Machine Elements and Manufacturing
JSME International Journal Series B Fluids and Thermal Engineering