Abstract
The running-in process is the initial process for the new moving parts wearing against each other to establish the shape adjustment that will regulate them into a stable relationship for the rest of their working life. The objective of this research is to investigate and evaluate the running-in process by using disk-on-block line contact device. Due to its empirical nature and well-ploughed analysis, an asperity micro-contact model is considered. The experiment is performed by varying the surface roughness of the block with rigid smooth sphere surface under specific condition. The effects of surface roughness, load, speed, and lubrication on the running-in behaviour is studied. The running-in process encourage plastic deformation of asperities and created microstructural changes on contact surfaces. The theoretical and experiment result shows that the plasticity index ps, surface roughness parameter b, real contact area ratio * A0 and specific film thickness l is influenced by the running-in process.
Highlights
Running-in refers to the mechanism during the initial level of usage by which contacting machine parts improve in conformity, surface topography, and frictional behaviour [1]
The aim of the research is to investigate the differrent effect of tribological parameters for the running-in application.The line contact experiment is used in this analysis to explore the relationship and changes among the surface parameters, plasticity index, friction coefficient, contact area ratio, film thickness, and wear scar during the running-in process in order to better understand how the contact surfaces changes during the running-in process
The line contact lubricant bath mechanism is used in this study to perform a running-in operating experiment with various loads, speeds, lubricants and roughness values
Summary
Running-in refers to the mechanism during the initial level of usage by which contacting machine parts improve in conformity, surface topography, and frictional behaviour [1]. Unworn surfaces come in the contact with one another, or when a worn part on one side of a couple is replaced with a new one, modifications occur. Researchers have shown that applying a running-in process to certain tribology components will result in better operating performance. The basic reasons why a running-in procedure can improve performance are better understood than for others; depending on the tribology system and materials involved, the following modifications have all been related with running-in. Contact can occur at just a few points at first to support the normal load.
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