The stress corrosion cracking (SCC) susceptibility of an as-cast AZ80 magnesium alloy was evaluated using slow strain rate test (SSRT) in air and in 3.5% NaCl solution at various strain rates (10⁻⁵ s⁻¹, 10⁻⁶ s⁻¹, and 10⁻⁷ s⁻¹). Furthermore, to elucidate the effect of aluminum content, the SCC susceptibility of an as-cast AZ31 alloy was also evaluated and compared with the as-cast AZ80 alloy. The SCC susceptibility was quantified using susceptibility indices corresponding to ultimate tensile strength (UTS), strain to failure and time to failure. The SCC susceptibility was found to increase with a decrease in strain rate for both the alloys. The higher SCC susceptibility of the as-cast AZ80 alloy as compared to the as-cast AZ31 alloy was attributed to the higher volume fraction of Mg₁₇Al₁₂ particles, and this was corroborated with the fractographic analysis using a combination of scanning electron microscopy (SEM) and energy dispersive x-ray spectroscopy (EDS).

在空气中和在各种应变率3.5％NaCl溶液（10使用慢应变速率试验（SSRT）的应力腐蚀裂纹的铸态AZ80镁合金的（SCC）的易感性进行评价^-5小号^-1，10个^-6小号^-1和10 ^-7 s ^-1）。此外，为阐明铝含量的影响，还评估了铸态AZ31合金的SCC敏感性，并与铸态AZ80合金进行了比较。使用与极限抗拉强度（UTS），失效应变和失效时间相对应的敏感性指数来量化SCC敏感性。发现两种合金的SCC敏感性均随应变速率的降低而增加。与铸态AZ31合金相比，铸态AZ80合金具有更高的SCC敏感性，这归因于Mg ₁₇ Al ₁₂颗粒的体积分数更高，这与使用扫描电子显微镜相结合的分光分析法得到了证实（ SEM）和能量色散X射线光谱仪（EDS）。