Effect of anodizing treatment on the very high cycle fatigue behavior of 2A12-T4 aluminum alloy
Effect of anodizing treatment on the very high cycle fatigue behavior of 2A12-T4 aluminum alloy
复制标题
阳极氧化处理对2A12-T4铝合金超高周疲劳行为的影响
DOI：
10.1016/j.matdes.2013.03.083
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发表时间：
2013-09
期刊：
影响因子：
--
通讯作者：
Zhong, Qunpeng
中科院分区：
文献类型：
--
作者：
Nie, Baohua;Zhang, Zheng;Zhao, Zihua;Zhong, Qunpeng
通过超声疲劳试验研究了铬酸阳极氧化（CAA）和硫酸阳极氧化（SAA）处理对2A 12-T4铝合金超高周疲劳性能的影响。结果表明，CAA和SAA处理使阳极氧化膜的疲劳强度明显降低，裂纹萌生于膜基界面，而在5× 108次以上，基体试样的疲劳裂纹萌生于试样的亚表面。CAA试样疲劳强度的降低与阳极氧化膜和基体之间的弹性失配引起的残余拉应力有关。SAA膜中的缺陷，如分段裂纹和过度生长的阳极氧化膜到基板，有助于疲劳强度的降低和多裂纹的萌生。SAA试样的疲劳极限预测值与试验结果吻合较好。
The effects of chromic acid anodizing (CAA) and sulfuric acid anodizing (SAA) treatments on the very high cycle fatigue behavior of 2A12-T4 aluminum alloy were investigated through ultrasonic fatigue tests. The results showed that CAA and SAA treatments resulted in an appreciable reduction in the fatigue strength and crack initiation from the interface between the anodizing film and substrate, whereas the fatigue crack of substrate specimens initiated from the specimen subsurface over 5×108cycles. The decrease in fatigue strength of the CAA specimens was associated with the residual tensile stress arising from the elastic mismatch between the anodizing film and the substrate. The defects in SAA film, such as segmentation cracks and overgrowth of the anodizing film into the substrate, contributed to the reduction of fatigue strength and multi-crack initiations. The predicted fatigue limit for SAA specimens well agreed with the experimental results.
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影响因子：
1.6
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