The mechanical response of a commercial aluminum alloy, AA7085, was examined using slow strain rate testing in dry air and humid air at 70 °C. These tests and fractographic observations confirmed that the alloy suffered from hydrogen embrittlement when exposed to humid air. Crack initiation was studied in both environments to evaluate the effect of humidity on crack nucleation. Observations from both slow strain rate tests and constant displacement tests were compared. Specimens from slow strain rate testing were examined after fracture while constant displacement testing allowed periodic observations of the sample surface. Based on these observations, a mechanism for the crack initiation in humidity has been proposed for AA7085 that does not involve substantial contribution from anodic dissolution.

使用慢应变速率测试，在70°C的干燥空气和潮湿空气中，测试了商用铝合金A7085的机械响应。这些测试和分形学观察证实，合金在暴露于潮湿空气中时会发生氢脆。在两种环境下都研究了裂纹萌生，以评估湿度对裂纹成核的影响。比较了慢应变速率测试和恒定位移测试的观察结果。慢应变速率测试的样品在断裂后进行检查，而恒定位移测试则允许定期观察样品表面。基于这些观察，已经提出了AA7085在湿度中引发裂纹的机制，该机制不涉及阳极溶解的实质性贡献。