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AF1410与300M钢的腐蚀冲击疲劳行为 被引量:16

Corrosion Impact Fatigue Behavior of AF1410 Steel and 300M Steel
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摘要 根据舰载飞机起落架的服役条件提出了腐蚀冲击疲劳概念和试验方法。考察了两种起落架材料在盐水中的腐蚀冲击疲劳行为 ,包括冲击疲劳寿命、裂纹萌生与扩展速率。尽管两种材料在空气中的冲击疲劳寿命几乎相等 ,但 30 0 M钢在盐水中的冲击疲劳寿命下降幅度较大。在盐水介质中 ,氢脆加速 30 0 M钢冲击疲劳裂纹的萌生和扩展。局部塑性变形区优先腐蚀促使 AF14 10钢的裂纹萌生 ,盐水对 AF14 According to the severe service conditions of landing gear on carrier-based aircraft, a concept and a test method of corrosion impact fatigue were described. The corrosion impact fatigue behaviors of AF1410 steel and 300M steel were experimentally investigated, including impact fatigue life, fatigue crack initiation and fatigue crack propagation. The decrease in impact fatigue life of 300M steel in 3.5%NaCl solution is greater than that of AF1410 steel, even though they have almost equal impact fatigue life in air. The process of fatigue crack initiation and fatigue crack propagation in 300M steel are promoted in saltwater by a localized hydrogen embrittlement mechanism. Fatigue crack initiation in AF1410 steel is assisted in the aggressive environment by pitting corrosion occurring at the localized plastic deformation zone. Fatigue crack propagation rate of AF1410 steel is not affected by salt aqueous.
出处 《材料工程》 EI CAS CSCD 北大核心 2003年第1期3-5,37,共4页 Journal of Materials Engineering
基金 航空基金资助项目
关键词 AF1410钢 300M钢 腐蚀冲击疲劳 裂纹扩展速率 疲劳试验 corrosion impact fatigue AF1410 steel crack propagation rate
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参考文献2

  • 1杨峥.用多次冲击法测定金属断裂韧性[J].金属学报,1978,14(4):409-413. 被引量:3
  • 2Ssuresh 王中光等译.材料的疲劳[M].北京:国防工业出版社,1993.204-223. 被引量:2

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