In this study, “within the environment” and “within the contact” in situ tribology techniques are combined in order to study the interfacial processes in lubricated metallic (i.e., aluminum-based) sliding conditions. The evolution of the roughness follows the trend of the coefficient of friction closely, with initially low values followed by higher roughness during steady state. Similarly, the transfer film behavior correlates well with the roughness of the worn surfaces and the subsurface microstructure of the worn surfaces. The effect of normal load on the running-in behavior is also studied in terms of differences in the interfacial processes.
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PS and MD thank the Deutsche Forschungsgemeinschaft for financial support. RRC and JMS thank the Natural Science and Engineering Research Council (NSERC) of Canada for financial support. MD also acknowledges support from COST action MP 1303. The authors would also like to thank Patrice Brenner and Eberhard Nold for their contributions with the FIB and XPS analyses, respectively. The authors also thank Markus Stricker for his help with the online measurements.
Present address: NRC Postdoctoral Fellow, U.S. Naval Research Laboratory, Code 6176, Tribology and Molecular Interfaces Section, Washington, DC 20375, United States.
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Stoyanov, P., Shockley, J.M., Dienwiebel, M. et al. Combining in situ and online approaches to monitor interfacial processes in lubricated sliding contacts. MRS Communications 6, 301–308 (2016). https://doi.org/10.1557/mrc.2016.35