LY12CZ铝合金微动损伤机制的研究

陶峰; 张雨

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航空材料学报 ›› 2002, Vol. 22 ›› Issue (2) : 1-4.

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论文

LY12CZ铝合金微动损伤机制的研究

作者信息 +

Research on mechanism of LY12CZ aluminum alloy fretting damage

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文章历史 +

摘要

通过对LY12CZ铝合金螺栓联接试件的微动损伤试验,完整提出了铝合金的微动磨损损伤与微动疲劳损伤的机制。在铝合金的微动磨损机制方面,微动损伤区表面的扫描电镜图和化学成分分析表明,铝合金的微动磨损是一个复杂过程,包括了粘着、磨料、表面疲劳、氧化四个子过程。着重研究了这四个子过程产生的先后顺序以及对微动磨损的影响;在铝合金的微动疲劳机制方面,分析了铝合金产生扩展性微动疲劳裂纹的原因和过程,并根据试验结果说明了微动疲劳裂纹产生的位置以及裂纹扩展的方向等。

Abstract

The fretting wear of aluminum alloy is a very complicated process, and it involves four subprocesses adherence、rubbing、oxidation、surface fatigue. In those subprocesses surface takes up a dominant status, and the effect of oxidation should not be neglected. The fretting fatigue cracks of aluminum appear on the common boundary of slide and none slide, because on that boundary there is the highest stress which makes microcracks initiating and expanding. The pit produced by fretting wear strengthens stress concentration and makes microcracks changing into expandable fretting fatigue crack.

导出引用

陶峰, 张雨. LY12CZ铝合金微动损伤机制的研究[J]. 航空材料学报, 2002, 22(2): 1-4

TAO Feng, ZHANG Yu. Research on mechanism of LY12CZ aluminum alloy fretting damage[J]. Journal of Aeronautical Materials, 2002, 22(2): 1-4

参考文献

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