Abstract
Hydrogen embrittlement and SCC behavior of bending 7075-T6 aluminum alloy specimens were examined. The compression side of each specimen with both side notchs was only exposed to the cathodic charging solution or SCC environment. The notch strength was gradually decreased with increasing charging time. Prominent embrittlement was found on the tension side, but not on the compression side. Both the embrittlement and cracking on the tension side were also found in a SCC test specimen of which the compression side was only exposed. These results were only caused by the understood by the mechanism of hydrogen embrittlement hydrogen permeated from the compression side and transported to the tension side by diffusion. Thus, it was concluded that the hydrogen embrittlement was involved in the SCC mechanism.
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