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| Stress Corrosion Fracture of Beryllium Bronze Spring Flake |
| Received:July 31, 2018 Revised:November 25, 2018 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/ issn.1672-9242.2018.11.009 |
| KeyWord:beryllium bronze spring flake stress corrosion |
| Author | Institution |
| MU Ren-de |
1. Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material, Beijing Institute of Aeronautical Materials, Beijing , China |
| LIU De-lin |
1. Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material, Beijing Institute of Aeronautical Materials, Beijing , China |
| LU Feng |
1. Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material, Beijing Institute of Aeronautical Materials, Beijing , China |
| JIANG Tao |
2. Failure Analysis Center of Aviation Industry Corporation of China, Beijing , China |
| HE Li-ming |
1. Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material, Beijing Institute of Aeronautical Materials, Beijing , China |
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| Abstract: |
| Objective To research the mechanism for stress corrosion of spring flake for microswitch of sensor and find out the cause of fracture. Methods Morphological observation of fracture, analysis of energy spectrum, and corrosion simulation of product were carried out. Results Free ammonia was released from switch box at the working temperature in the moist heat cir-cumstance which is caused by rainwater entering the sensor accidentally. The concave side of beryllium bronze spring flake was under tensile stress when it worked, so the spring flake fractured by stress corrosion. Conclusions Through using non-aminon phenolic plastic producing switch box, the stress corrosion of spring flake is effectively prevented. |
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