Micro-scale frictional behavior of a bearing steel (JIS SUJ2) in cyclic sliding motion
Micro-scale frictional behavior of a bearing steel (JIS SUJ2) in cyclic sliding motion
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DOI：
10.1016/j.prostr.2019.12.035
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
Yuya Tanaka;H. Matsunaga;M. Endo;S. Moriyama
中科院分区：
文献类型：
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作者：
Yuya Tanaka;H. Matsunaga;M. Endo;S. Moriyama
近年来，断裂力学在轴承、轨/轮、齿轮等机械部件的设计中得到了应用，建立了基于力学的滚动接触疲劳强度评价方法。剥落是一种典型的滚动接触破坏模式，它与剪切模式（II型和III型）疲劳裂纹扩展密切相关，而剪切模式（II型和III型）疲劳裂纹扩展受相对裂纹面相互作用的显著影响。因此，了解在往复滑动接触中裂纹面的摩擦学特性对于材料设计以及与滚动接触疲劳相关的许多部件的机械设计至关重要。利用轴扭联合疲劳试验机进行了环对环试验，研究了非润滑条件下的微尺度摩擦现象。所研究的材料是一种热处理的高碳铬轴承钢（JIS SUJ2），维氏硬度为753。在平均接触压力为10 ~ 100 MPa、相对位移幅值为10 ~ 100 μm、正弦频率为0.1 ~ 10hz、初始表面粗糙度Ra为0.2 ~ 1.7的条件下，进行了104次循环试验。在试验过程中，定期监测切向力、接触载荷和接触面之间的相对位移的时间变化。
Application of fracture mechanics has recently been emphasized to establish the mechanics-based evaluation of the rolling contact fatigue strength for designing mechanical elements such as bearing, rail/wheel, gear, etc. Flaking that is a typical rolling contact failure mode is intimately related to the shear-mode (modes II and III) fatigue crack growth, which is significantly affected by the interaction of opposing crack faces. Understanding the tribological properties on the crack faces being in the reciprocating sliding contact is therefore essential for the material design as well as the mechanical design of many components associated with rolling contact fatigue. The present study carried out a ring-on-ring test by making use of a combined axial-torsional fatigue testing machine to investigate the micro-scale frictional phenomena under the non-lubricated condition. The material investigated was a heat-treated high-carbon-chromium bearing steel (JIS SUJ2) with a Vickers hardness of 753. The tests were conducted up to 104cycles under the various conditions of mean contact pressures of 10-100 MPa, relative displacement amplitudes of about 10-100 μm, sinusoidal frequencies of 0.1-10Hz, and initial surface roughness values,Ra, of 0.2-1.7. The time variations of the tangential force, contact load and the relative displacement between contact surfaces were periodically monitored at a predetermined number of cycles during testing.