Each file has a figure number which clearly relates the data to the figure as presented. from The roles of contact conformity, temperature and displacement amplitude on the lubricated fretting wear of a steel-on-steel contact

This paper investigates the effect of contact geometry, temperature and displacement amplitude on the fretting behaviour of an aero-turbo oil lubricated cylinder-on-flat contact. To be effective, the lubricant needed both to penetrate the contact and then offer protection. Lubricant penetration into the fretting contact is found to be controlled by two physical parameters, namely (i) the width of the contact that remains covered throughout the fretting test and (ii) the lubricant viscosity. The protection offered by the lubricant (assuming that it has successfully penetrated the contact) is influenced by four physical parameters, namely (i) lubricant viscosity, (ii) traverse velocity, (iii) nominal contact pressure and (iv) chemical effects. The relationship between the three experimental parameters which were varied in the programme of work (temperature, fretting displacement and cylinder radius) and physical parameters which influence the protection offered by the lubricant film can be competing, and therefore, complex wear behaviour is observed. The roles of the various parameters in controlling the wear behaviour are presented in a coherent physical framework.

本文针对航空涡轮机油润滑的圆柱-平面接触副（cylinder-on-flat contact），研究了接触几何形貌、温度与位移幅值对其微动行为的影响。若要发挥润滑效用，润滑油需同时实现接触区域渗透与防护双重功能。研究表明，润滑油在微动接触区域的渗透过程受两项物理参数调控：一是贯穿整个微动试验始终保持覆盖状态的接触区域宽度，二是润滑油黏度。假设润滑油已成功渗透至接触区域，其提供的防护性能则受四项物理参数影响：其一为润滑油黏度，其二为滑移速度，其三为名义接触压力，其四为化学效应。本试验计划中调控的三项试验参数——温度、微动位移与圆柱半径——与影响润滑油膜（lubricant film）防护性能的物理参数之间可能存在竞争关系，因此可观测到复杂的磨损行为。本文在统一的物理框架下，阐明了各参数对磨损行为的调控机制。