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| Influence of Typical Anodizing Process on Fatigue Life of 2A12-T4 Aluminum Alloy |
| Received:November 21, 2024 Revised:February 12, 2025 |
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| DOI：10.7643/issn.1672-9242.2025.03.004 |
| KeyWord:2A12-T4 aluminum alloy anodizing fatigue test surface treatment fatigue life dispersion coefficient |
| Author | Institution |
| SONG Yujian |
Qingdao Campus of Naval Aviation University, Shandong Qingdao , China;Unit 95939, People's Liberation Army, Hebei Cangzhou , China |
| QIN Haiqin |
Qingdao Campus of Naval Aviation University, Shandong Qingdao , China |
| ZHANG Deyao |
Unit 95939, People's Liberation Army, Hebei Cangzhou , China |
| JI Pengcheng |
Qingdao Campus of Naval Aviation University, Shandong Qingdao , China |
| LIU Kun |
Qingdao Campus of Naval Aviation University, Shandong Qingdao , China |
| QIN Min |
Qingdao Campus of Naval Aviation University, Shandong Qingdao , China |
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| Abstract: |
| The work aims to study the effects of four typical anodizing processes on the fatigue life of 2A12-T4 aluminum alloy.The surface of 2A12-T4 aluminum alloy specimens was treated with four typical anodizing processes:sulfuric acid anodizing, hard anodizing, sulfuric-boric acid anodizing, and microarc oxidation. Fatigue tests were conducted at two maximum stress levels of 150 MPa and 200 MPa. The fatigue life of anodized specimens and ordinary specimens was statistically analyzed to investigate the effects of typical anodizing processes on the fatigue life of 2A12-T4 aluminum alloy.The result showed that the fatigue life of both ordinary and anodized specimens followed a lognormal distribution. All four anodizing processes had an adverse effect on the fatigue life of 2A12-T4 aluminum alloy specimens, resulting in an increased dispersion coefficient and a reduced safe life. It was also found that the dispersion coefficient of specimens treated with the same anodizing process increased, and the safe life correspondingly decreased, with the increase of stress level. In conclusion,the fatigue life of 2A12-T4 aluminum alloy treated with the four anodizing processes still follows a lognormal distribution. However, except for a 0.4% increase in fatigue life for sulfuric-boric acid anodized specimens under a maximum stress of 150 MPa, the fatigue life of other specimens decreased. There is a positive correlation between the decreasing amplitude and the dispersion coefficient. |
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