The influence of the boundary lubricating conditions of three different fluids on the plastic fatigue related mechanisms of wear and scuffing

✍ Scribed by Young-Ze Lee; Byung-Ju Kim

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 265 KB
• Volume: 232
• Category: Article
• ISSN: 0043-1648
• DOI: 10.1016/s0043-1648(99)00252-5

✦ Synopsis

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. A correlation between low-cycle fatigue LCF life and scuffing-failure life as well as wear rate is demonstrated using the plastic strains in three stages of boundary lubricated sliding. Constant loading and proportional loading, which was proportional to hardness with three different lubricated conditions, were used to evaluate the plastic strain. From the results of constant loading tests, it was confirmed that the smaller values of wear rates were associated with longer life, because wear rates were inversely proportional to the hardness. Also, softer ones experienced relatively larger plastic strain than harder ones. Proportional loading, which produced the same amount of plastic deformation, shows that harder steels fail in earlier cycles more than softer ones because of smaller fracture ductility, but harder steels show lower wear rates, which are inversely proportional to the hardness under the Archard wear law. It can be concluded that the scuff-life is strongly related to the LCF, but wearing is dependent on the surface hardness, not LCF.