| 李晗,魏小琴,王琪,赵阳,赵方超,张晋尚,周雪鹏,刘伟,黄文明.飞机典型吊挂材料热带海洋环境大气腐蚀-动态疲劳寿命研究[J].装备环境工程,2024,21(12):121-127. LI Han,WEI Xiaoqin,WANG Qi,ZHAO Yang,ZHAO Fangchao,ZHANG Jinshang,ZHOU Xuepeng,LIU Wei,HUANG Wenming.Corrosion-Fatigue Life of Aircraft Suspension Materials in Tropical Marine Atmosphere[J].Equipment Environmental Engineering,2024,21(12):121-127. |
| 飞机典型吊挂材料热带海洋环境大气腐蚀-动态疲劳寿命研究 |
| Corrosion-Fatigue Life of Aircraft Suspension Materials in Tropical Marine Atmosphere |
| 投稿时间：2024-08-13 修订日期：2024-09-06 |
| DOI：10.7643/issn.1672-9242.2024.12.015 |
| 中文关键词: 热带海洋环境 40CrNiMoA合金钢 2A12铝合金 腐蚀-疲劳 失效机理 寿命中图分类号:TJ04 TG172 文献标志码:A 文章编号:1672-9242(2024)12-0121-07 |
| 英文关键词:tropical marine atmosphere 40CrNiMoA alloy steel 2A12 aluminum alloy corrosion-fatigue failure mechanism life |
| 基金项目: |
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| Author | Institution |
| LI Han | Southwest Institute of Technology and Engineering, Chongqing 400039, China |
| WEI Xiaoqin | Southwest Institute of Technology and Engineering, Chongqing 400039, China |
| WANG Qi | Southwest Institute of Technology and Engineering, Chongqing 400039, China |
| ZHAO Yang | Southwest Institute of Technology and Engineering, Chongqing 400039, China |
| ZHAO Fangchao | Southwest Institute of Technology and Engineering, Chongqing 400039, China |
| ZHANG Jinshang | Southwest Institute of Technology and Engineering, Chongqing 400039, China |
| ZHOU Xuepeng | Southwest Institute of Technology and Engineering, Chongqing 400039, China |
| LIU Wei | Southwest Institute of Technology and Engineering, Chongqing 400039, China |
| HUANG Wenming | Southwest Institute of Technology and Engineering, Chongqing 400039, China |
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| 中文摘要: |
| 目的 研究飞机典型吊挂材料在腐蚀-疲劳动态环境下的寿命。方法 对装备服役环境因数进行统计分析，利用典型金属材料的当量腐蚀加速关系及折算系数设计加速试验环境谱，将40CrNiMoA合金钢和2A12铝合金放置在模拟海洋大气环境中，利用自制大气腐蚀-动态疲劳环境模拟试验装置，开展腐蚀-疲劳协同试验，测试2种材料的S-N曲线，快速评估飞机典型吊挂材料在热带海洋环境下服役的腐蚀-疲劳寿命。结果 在pH=4酸性盐溶液(5% NaCl+0.05% Na2SO4+0.05% CaCl2)中喷淋4 h(t=40 ℃)后再干燥4 h(t=60 ℃)，反复交替进行环境和疲劳试验后，利用线性模型对40CrNiMoA合金钢和2A12铝合金试验数据进行处理，得到在腐蚀疲劳协同作用下，105循环周次对应的疲劳强度分别是906.2 MPa和224.6 MPa，与纯粹的疲劳强度相比，下降了2个数量级。主要是由于在腐蚀环境下，盐雾在金属材料表面腐蚀形成了腐蚀坑，最终成为裂纹源，扩展至断裂。结论 飞机吊挂结构在热带海洋大气环境下服役时，由于腐蚀-疲劳协同作用，疲劳强度呈数量级降低。 |
| 英文摘要: |
| The work aims to investigate the life of typical aircraft suspension materials under corrosion-fatigue dynamic environments. Statistical analysis was conducted on service environment factors. An accelerated test environment spectrum was designed by the equivalent corrosion acceleration relationship and the conversion factors for typical metal materials. 40CrNiMoA alloy steel and 2A12 aluminum alloy were placed in a simulated marine atmosphere environment. A self-made atmospheric corrosion-dynamic fatigue environment simulation test device was used to conduct corrosion-fatigue synergistic tests. The S-N curves of the two materials were tested to rapidly assess the corrosion-fatigue life of typical aircraft suspension materials in a tropical marine environment.In a pH=4 acidic salt solution (5% NaCl+0.05% Na2SO4+0.05% CaCl2), after spraying for 4 hours (t=40 ℃) and then drying for 4 hours (t=60 ℃), and repeatedly alternative environment and fatigue tests, the test data of 40CrNiMoA alloy steel and 2A12 aluminum alloy were processed with a linear model. Under the synergistic effect of corrosion and fatigue, the fatigue strength corresponding to 105cycles was 906.2 MPa and 224.6 MPa, respectively, which decreased by two orders of magnitude compared to the strength under pure fatigue. The primary reason was that in the corrosive environment, salt spray corroded the metal surface, forming corrosion pits, which eventually became crack sources and propagated to fracture.When the aircraft suspension structure is used in a tropical marine atmosphere, the fatigue strength significantly decreases due to the synergistic effect of corrosion and fatigue. |
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