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| Effect of Island-Reef Environment on Fatigue Performance of Lifting Lug |
| Received:September 03, 2023 Revised:November 12, 2023 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2024.01.017 |
| KeyWord:lifting lug island-reef environment corrosion inclusion variable amplitude loading fatigue performance |
| Author | Institution |
| WU Yang |
Southwest Institute of Technology and Engineering, Chongqing , China;National Field Scientific Observation and Research Station for Atmospheric Environmental Material Corrosion in Mohe, Heilongjiang Mohe , China |
| WANG Ling |
Southwest Institute of Technology and Engineering, Chongqing , China;CSGC Key Laboratory of Ammunition Storage Environmental Effects, Chongqing , China |
| HU Tao |
Southwest Institute of Technology and Engineering, Chongqing , China;CSGC Key Laboratory of Ammunition Storage Environmental Effects, Chongqing , China |
| LI Qian |
Southwest Institute of Technology and Engineering, Chongqing , China;CSGC Key Laboratory of Ammunition Storage Environmental Effects, Chongqing , China |
| SUN Youmei |
Southwest Institute of Technology and Engineering, Chongqing , China;CSGC Key Laboratory of Ammunition Storage Environmental Effects, Chongqing , China |
| QING Yanjun |
Southwest Institute of Technology and Engineering, Chongqing , China;National Field Scientific Observation and Research Station for Atmospheric Environmental Material Corrosion in Mohe, Heilongjiang Mohe , China |
| ZHANG Xianyong |
Southwest Institute of Technology and Engineering, Chongqing , China;CSGC Key Laboratory of Ammunition Storage Environmental Effects, Chongqing , China |
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| Abstract: |
| The work aims to study the corrosion characteristic of lifting lugs in island-reef environments and its effect on fatigue performance. By natural environment test of the lifting lug used for a missile in a typical island-reef environment, the fatigue performance of the lifting lug were tested by a variable amplitude fatigue test. At the same time, the fracture corrosion morphology and element content were analyzed to study the effect of the island-reef environment on the fatigue performance. The results showed that:after one year of natural environment test, corrosion occurred to the zinc-nickel layer on the lifting lug surface, which showed the characteristics of non-uniform corrosion. During the test period, as the time prolonged, the average fatigue fracture cycle times of the lug decreased, the ductile fracture characteristics of the fatigue fracture surface weakened, and the hydrogen content increased. MnS inclusions were found in the inner part of the lifting lug and located at the bottom of the ligament. The pitting pits on the surface of the lifting lug and the inclusion of MnS inside the lug can promote the initiation and growth of the crack under fatigue loading, and reduce the fatigue resistance of the lug. Therefore, the corrosion and quality control must be strengthened to improve the corrosion fatigue performance of lifting lugs. |
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