| 高强钛合金中的微动损伤与疲劳 |
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| 引用本文： | 王世洪,叶斌,梁佑明,沈桂琴.高强钛合金中的微动损伤与疲劳[J].北京航空航天大学学报,1990(4). |
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| 作者姓名： | 王世洪 叶斌 梁佑明 沈桂琴 |
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| 作者单位： | 北京航空航天大学材料科学与工程系
(王世洪，叶斌，梁佑明)，北京航空航天大学材料科学与工程系(沈桂琴) |
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| 摘 要： | 本文对高强钛合金Ti-10V-2Fe-3Al在不同温度下的微动损伤和疲劳特性进行了研究。试验结果表明,该合金对微动损伤十分敏感,常温疲劳强度下降达50％。微动损伤的主要机制是疲劳脱层,这是由作用在材料次表层的交变切应力引起的,它将导致疲劳裂纹的萌生和早期断裂。疲劳裂纹的扩展方向可根据接触应力分析得到解释。在较高试验温度下,由于接触面形成的氧化层的保护作用,微动损伤程度减弱。
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| 关 键 词： | 高强钛合金 微动损伤 微动疲劳 脱层 |
FRETTING DAMAGE AND FATIGUE OF HIGH STRENGTH TITANIUM ALLOY |
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| Wang Shihong Ye Bin Liang Youming Shen Guiqin.FRETTING DAMAGE AND FATIGUE OF HIGH STRENGTH TITANIUM ALLOY[J].Journal of Beijing University of Aeronautics and Astronautics,1990(4). |
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| Authors: | Wang Shihong Ye Bin Liang Youming Shen Guiqin |
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| Abstract: | Fretting damage and fatigue characteristics of high strength titanium alloy Ti-1023 at various temperature were studied.The experimental results shown that Ti-i 023 alloy is very sensitive to fretting damage,fatigue strength is decreased by 50%.Main mechanism of fretting damage is fatigue delamila-tion caused by alternative shear stress at the sub-surface of the material which lead to initiation of fatigue cracks and premature failure.Direction of crack propagation can be explained by the contact stresses.At elevated temperature,fretting damage is retarded owing to effective protection of oxides layer forming on contact surface. |
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| Keywords: | high strength titanium fretting damage fretting fatigue delamiiation |
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