| 航空用超高强度钢疲劳裂纹表面长度与内部长度之间的关系 |
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| 引用本文： | 王苗苗,曾燕屏,王习术,谢锡善.航空用超高强度钢疲劳裂纹表面长度与内部长度之间的关系[J].航空材料学报,2009,29(3):102-106. |
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| 作者姓名： | 王苗苗 曾燕屏 王习术 谢锡善 |
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| 作者单位： | 1. 北京科技大学材料科学与工程学院,北京,100083
2. 清华大学工程力学系,北京,100084 |
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| 摘 要： | 采用扫描电镜原位观测的方法,跟踪观察了低周疲劳载荷作用下超高强度钢中AlN夹杂导致裂纹萌生与扩展的微观行为,得到了材料疲劳裂纹表面长度与内部长度之间的关系,可以根据实际检测到的材料或者结构疲劳裂纹表面长度计算其内部长度,并估算其剩余寿命.
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| 关 键 词： | 超高强度钢 低周疲劳 夹杂物 裂纹萌生与扩展 原位观测 |
Relationship between Surface Length and Inside Length of Fatigue Crack in Ultra-high Strength Steel |
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| WANG Miao-miao,ZENG Yan-ping,WANG Xi-shu,XIE Xi-shan.Relationship between Surface Length and Inside Length of Fatigue Crack in Ultra-high Strength Steel[J].Journal of Aeronautical Materials,2009,29(3):102-106. |
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| Authors: | WANG Miao-miao ZENG Yan-ping WANG Xi-shu XIE Xi-shan |
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| Institution: | 1.School of Material Science and Engineering;University of Science and Technology Beijing;Beijing 100083;China;2.Department of Engineering Mechanics;Tsinghua University;Beijing 100084;China |
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| Abstract: | Ultra-high strength steel makes advancement incessantly with development of aeronautical industry.However,its sensitivity to the flaw increases with increasing in strength level.Non-metallic inclusion as one of the inevitable flaws must influence the performance,especially fatigue performance,of ultra-high strength steel.In-situ fatigue tests with special designed SEM have been conducted to trace the whole process of crack initiation and propagation induced by AlN inclusion in ultra-high strength steel unde... |
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| Keywords: | ultra-high strength steel low-cycle fatigue inclusions crack initiation and propagation in-situ observation |
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