High-strength, corrosion-resistant, and lightweight Al–Mg alloys perform an important function in harsh coastal service environments. Corrosion resistance is generally inversely correlated with strength; hence, it is difficult to simultaneously optimize both. In this study, a low-magnesium Er-containing Al-based alloy that is stronger and more corrosion resistant than Al-based alloys have been reported. The alloy contains Er, and the precipitation of Al₃Er within a face-centered cubic matrix is obtained by a series of smelting–casting, heat treatment, and rolling processes. It is presumed that the strengthening phase of Al₃Er pinning dislocations improves alloy strength. It also increases the recrystallization temperature of cold-rolled matrix and induces the distribution of small-angle grain boundaries, thus allowing the alloy to achieve excellent environmental corrosion resistance. As a result, strength and corrosion resistance are simultaneously improved.

中文翻译：

---

Al-Mg-Er合金强度与耐蚀性的协同平衡

高强度，耐腐蚀，重量轻的Al-Mg合金在严酷的沿海使用环境中起着重要的作用。耐腐蚀性通常与强度成反比。因此，很难同时优化两者。在该研究中，已经报道了比Al基合金更强并且更耐腐蚀的低镁含Er的Al基合金。合金中含有Er，并且通过一系列的熔铸，热处理和轧制过程获得了Al ₃ Er在面心立方基体内的沉淀。据推测，Al ₃的强化阶段pin钉状位错提高了合金强度。它还增加了冷轧基体的再结晶温度，并引起了小角度晶界的分布，从而使合金获得了优异的耐环境腐蚀性。结果，强度和耐腐蚀性同时提高。