45#钢微动疲劳特性的研究

微动疲劳发生于两零件的接触表面间，紧密接触表面间的微辐滑动是产生微动疲劳的重要因素。微动疲劳导致零部件的强度显著降低，是引发意外失效事故的重要原因之一，因此研究材料的微动疲劳特性具有重要的理论和工程应用价值。本文研究了45^#钢在室温下的微动疲劳特性，通过采用宏观力学试验与微观结构分析相结合的方法探讨了45^#钢微动疲劳破坏的机理。通过对试验结果进行分析，确定了显著影响微动疲劳特性的重要因素，从而加深了对微动疲劳过程的认识，而且其中一些结果可以推广应用到其他材料上去。

Fretting Fatigue Behavior of 45# Carbon Constructional Steel

Fretting fatigue occurs on the contact surface between two components, where relative micro slip on the interface between two surfaces in intimate contact plays an important role. Fretting fatigue is one of the most important phenomena for inducing a dramatic reduction of fatigue strength and consequently, of unexpected failure accidents. The fretting fatigue behavior of 45 # carbon constructional steel at room temperature is studied. The fretting fatigue failure mechanism of 45 # carbon constructional steel is investigated by fatigue test and scanning electronic microscope analysis. The important variables established can significantly affect fretting fatigue behaviour, and increased the fundamental understanding of the fretting fatigue process. Some conclusions are also suitable for the other metal materials.