摘要
研究LZ50车轴钢不同过盈配合接触应力水平对旋转弯曲微动疲劳寿命的影响。分别利用光学显微镜、扫描电子显微镜对过盈配合表面的微动损伤表面和断口进行分析。结果表明,随着过盈量的增加,LZ50车轴钢旋转弯曲微动疲劳寿命呈现先降低而后升高的非线性特征,这是多轴复杂应力、配合面的接触应力、微动摩擦应力以及微动磨损交互作用的结果。
LZ50 railway axle steel were carried out to study the effects of contact stress on rotating bending fretting fatigue life under different press-fit contact stresses. Optical microscope （OM） and Scanning electron microscope （SEM） were used to analyze the press-fit fretting damage surfaces and fracture surfaces, respectively. The results show that the rotating bending fretting fatigue life of the LZ50 present a nonliner feature, decrease with the increase of contact stress firstly, and then increase. It is due to the combination of the complex multiaxial stress of sample, contact stress between contact interfaces, fretting frication stress and the interaction between fretting wear and fretting fatigue.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2014年第2期34-38,共5页
Journal of Materials Engineering
基金
国家杰出青年科学基金资助项目(51025519)
教育部创新研究团队资助项目(IRT1178)
关键词
微动疲劳
旋转弯曲
车轴
接触应力
过盈配合
fretting fatigue
rotating bending
railway axle
contact stress
press-fit
