【摘要】 通过柱面对柱面的接触方式,研究了35CrMoA钢在圆形路径载荷下的微动疲劳失效特性,采用扫描电子显微镜对微动疲劳试样的微动斑、磨削及微裂纹进行观察。试验结果表明:随着微动摩擦磨损的进行,磨损方式逐渐由粘着磨损转变为磨削磨损;微动斑的粘着区存在着圆形或近圆形的微小斑痕,滑移区上堆积了大量的磨屑;微动疲劳失效部位发生在粘着区与滑移区的交界处,并由于等效应力的不同而失效位置不同;微动疲劳的微裂纹存在于晶界上,并且沿晶界扩展。更多还原

【Abstract】 The fretting fatigue failure behavior of 35 Cr Mo A under circular path loading was investigated by means of cylinder to cylinder contact. The fretting wear scar,debris and microcracks were observed by scanning electronic microscope( SEM). The test results indicated that the wear pattern changed gradually from stick wear to debris wear with fretting wear going on; it existed circular or nearly circular micro scars in the stick region and lots of debris in the slip region. The fretting fatigue failure area happened at the boundary between stick region and slip region,and it was different because of different equivalent stress. The fretting fatigue microcracks existed at the grain boundary and extended along the grain boundary.更多还原