| AF1410与300M钢的腐蚀冲击疲劳行为 |
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| 引用本文： | 杨东方,赵振业.AF1410与300M钢的腐蚀冲击疲劳行为[J].材料工程,2003(1):3-5,37. |
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| 作者姓名： | 杨东方 赵振业 |
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| 作者单位： | 北京航空材料研究院,北京,100095 |
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| 摘 要： | 根据舰载飞机起落的服务条件提出了腐蚀冲击概念和试验方法，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300M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300M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AF1410钢的裂纹萌生，盐水对AF1410钢的裂纹扩展速率没有影响。
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| 关 键 词： | AF1410钢 300M钢 腐蚀冲击疲劳 裂纹扩展速率 疲劳试验 |
| 文章编号： | 1001-4381(2003)01-0003-03 |
Corrosion Impact Fatigue Behavior of AF1410 Steel and 300M Steel |
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| YANG Dong fang,ZHAO Zhen ye.Corrosion Impact Fatigue Behavior of AF1410 Steel and 300M Steel[J].Journal of Materials Engineering,2003(1):3-5,37. |
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| Authors: | YANG Dong fang ZHAO Zhen ye |
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| Abstract: | 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 |
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| Keywords: | corrosion impact fatigue AF1410 steel crack propagation rate |
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