This study observed the effect of neutron irradiation and ageing on the microstructure, hardness, and corrosion resistance of SAV-1 (Al–Mg–Si) alloy. The investigated material was irradiated with neutrons to fluences of 10²¹–10²⁶ n/m² in the WWR-K research reactor and kept in dry storage. Long-term irradiation led to an increase in hardness of the alloy and a deterioration of pitting corrosion resistance. Post-irradiation ageing for 1 h at 100–300 °C resulted in a decrease in microhardness of the irradiated SAV-1. The effect of post-irradiation ageing on pitting corrosion was made clear through the formation of Guinier-Preston zones and secondary precipitates in the Al matrix. Ageing at 250 °C corresponded to the development of stable microstructure and the highest corrosion resistance for the irradiated samples. Mg₂Si, Si, and needle-shaped β″ precipitates were formed in SAV-1 alloy that was irradiated with low fluences. β″ and clusters of rod-shaped B-type precipitates were observed in highly irradiated samples. The precipitates were similar to those seen in non-irradiated pseudo-binary Al–Mg₂Si alloys with Si excess.

本研究观察了中子辐照和时效对 SAV-1 (Al-Mg-Si) 合金的显微组织、硬度和耐腐蚀性能的影响。所研究的材料用中子辐照到 10 ²¹ –10 ²⁶ n/m ^{2 的}通量在 WWR-K 研究堆中并保持干燥储存。长期辐照导致合金硬度增加和耐点蚀性能变差。在 100–300 °C 下辐照后老化 1 小时导致辐照后 SAV-1 的显微硬度降低。通过在铝基体中形成 Guinier-Preston 区和二次沉淀物，可以清楚地表明辐照后时效对点蚀的影响。在 250 °C 时效对应于稳定的微观结构的发展和辐照样品的最高耐腐蚀性。镁₂在低通量辐照的 SAV-1 合金中形成了 Si、Si 和针状 β" 沉淀物。在高辐照样品中观察到 β" 和棒状 B 型沉淀物簇。析出物与在未辐照的伪二元 Al-Mg ₂ Si 合金中观察到的相似，Si 过量。