Publication Date:
2018-02-03
Description:
Grain boundary character distribution (GBCD) of solution heat treated 2024 Al alloy was analyzed by electron backscattered diffraction, and intergranular corrosion (IGC) susceptibility and corrosion weight loss of the 2024 Al were investigated according to ASTM G110-92. The grain boundaries are composed of 12.17% low angle (∑1) boundaries, 10.87% low coincidence site lattice (∑3-∑29) boundaries and 76.96% random (R) boundaries. After corrosion for 6 h, the corroded boundary proportions of ∑1, ∑3, ∑5-∑29 and R boundaries were 10.71%, 11.11%, 21.95% and 25.14%, respectively. This shows that the GBCD has a great effect on IGC susceptibility of the solution treated 2024 Al, and both ∑1 and ∑3 boundaries exhibit much higher IGC resistance than ∑5-∑29 and R boundaries. Among all the boundaries, the R boundaries have the highest IGC susceptibility.
Print ISSN:
1757-8981
Electronic ISSN:
1757-899X
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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