To enhance the stress corrosion cracking (SCC) resistance, Zn was utilized as an alloy element to add in the AA5083 aluminum alloys. The effects of Zn content on the microstructures, mechanical properties and SCC resistance were systematically evaluated. The results demonstrate that in the studied range adding Zn can significantly improve the SCC resistance of the AA5083 alloys. This is related to the relatively low amount of continuous β (Al₃Mg₂) phase along grain boundary and the formation of Zn-containing phase such as Al₅Mg₁₁Zn₄ phase. Based on the results, the optimal Zn content with respect to SCC resistance is approximately 0.50 wt.%. Further increasing Zn content results in coarse precipitates discontinuously distributed along grain boundaries.

中文翻译：

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锌含量对AA5083铝合金组织，力学性能和应力腐蚀行为的影响

为了增强抗应力腐蚀开裂（SCC）的性能，Zn被用作合金元素添加到AA5083铝合金中。系统评价了Zn含量对组织，力学性能和耐SCC性的影响。结果表明，在研究范围内，添加锌可以显着提高AA5083合金的耐SCC性。这与沿晶界的连续β（Al ₃ Mg ₂）相相对较低的量以及诸如Al ₅ Mg ₁₁ Zn ₄的含锌相的形成有关。相。根据结果​​，相对于抗SCC性的最佳Zn含量为约0.50重量％。锌含量的进一步增加导致沿晶界不连续分布的粗大析出物。