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WEB Grasping microstructural processes under a tribological load: A novel multi-modal approach

Tuesday (22.09.2020)
15:55 - 16:10 S: Structural Materials 2
Part of:

For many tribological systems, the microstructure beneath the surface determines the frictional response of the system. During the course of a system’s operational time, the tribological loading alters the materials’ microstructure (e.g. dislocation densities, grain sizes as well as chemical composition) which causes changes in the frictional forces and stresses that may further alter the microstructure — complex, highly dynamic and continuously ongoing processes of material evolution are taking place right beneath the contact.

Commonly used methods in materials science may give insights on the underlying mechanisms of these processes, however most of them can only be applied ex-situ after the experiment has finished and do require a tedious and very time-consuming sample preparation to yield trustworthy results. This makes them inherently unsuitable for the task of fully capturing the various dynamically acting mechanisms in materials under a tribological load.

In order to observe these mechanisms while they are at work — i.e. during the tribological experiment — we equipped a tribometer with various state-of-the-art sensors that allow the non-destructive characterization of materials. First results indicate that this multi-modal approach might pave the way for finding physical correlations between a system’s frictional response and the mechanisms acting “behind the scenes”; a glimpse of how future tribometry may look like will be presented.

Paul Schreiber
Karlsruhe Institute of Technology (KIT)
Additional Authors:
  • Dr. Christian Greiner
    Karlsruhe Institute of Technology (KIT)