阳极化对航空铝合金疲劳性能的影响

Effect of Anodizing on Fatigue Performance of Aeronautic Aluminum Alloys

采用S-N曲线研究硫酸阳极化、铬酸阳极化和硼酸硫酸阳极化对航空铝合金疲劳极限的影响。结果表明,对包铝的铝合金,不同阳极化试样的疲劳极限差别很小,对于铝合金基材,硫酸阳极化明显降低材料的疲劳极限,铬酸阳极化使材料的疲劳极限下降,而硼酸-硫酸阳极化不降低材料的疲劳极限。并对造成上述现象的原因进行了讨论。

The effect of sulfuric acid, chromate acid and boric/sulfuric acid anodizing on fatigue performance of aeronautic aluminum alloys was studied by using S-N curve. The results illustrated that, different anodized cladding aluminum alloys had almost same fatigue limits ; however, suffutrie acid anodizing greatly decreased fatigue limits of aluminum alloys, chromate acid also decreased fatigue limits of materials; boric/sulfuric acid anodizing did not decrease fatigue limits of aluminum alloys. The reason of above results was discussed.