The influence of relative humidity (RH) on mechanical properties of a 7075 alloy, cold finished aluminum wrought product, was studied by slow strain rate technique in atmospheres with various RHs. Hydrogen was introduced into specimens from the testing environment during deformation and then thermal desorption spectrometry was utilized to determine the content of absorbed hydrogen. By increasing the RH in slow strain rate tensile tests, the ultimate tensile strength remained unchanged, the content of hydrogen increased, and the total tensile elongation reduced, revealing an increase in the hydrogen embrittlement sensitivity (HES). In RHs below 40%, the HES was insignificant. However, by increasing the RH, a sharp increase in HES was observed due to the formation of secondary cracks. The results firstly showed that even a normal humidity (40–60%) of the testing environment at room temperature can lead to a significant HES in a wrought aluminum alloy.

相对湿度 (RH) 对 7075 合金冷加工铝锻制品机械性能的影响，通过慢应变率技术在各种 RH 的气氛中进行了研究。在变形过程中将氢气从测试环境中引入试样，然后利用热解吸光谱法测定吸收的氢气含量。通过增加慢应变速率拉伸试验中的RH，极限拉伸强度保持不变，氢含量增加，总拉伸伸长率降低，表明氢脆敏感性（HES）增加。在 RH 低于 40% 时，HES 不显着。然而，通过增加 RH，由于二次裂纹的形成，观察到 HES 急剧增加。