000265642 001__ 265642
000265642 005__ 20190517161331.0
000265642 037__ $$aPOST_TALK
000265642 245__ $$aAdhesive wear mechanisms in the presence of weak interfaces
000265642 260__ $$c2019-04-01
000265642 269__ $$a2019-04-01
000265642 336__ $$aTalks
000265642 513__ $$aTalks
000265642 520__ $$aDespite the relevance of wear in many engineering applications, our understanding of the connection between mechanisms at the nanoscale and the observed wear rates of contacting parts at the macroscale remains limited. Recent work in our group has therefore focused on physics-based models of adhesive wear mechanisms, identifying a material-dependent critical length scale for wear particle formation. Upscaling of these findings, though, still remains challenging. One problem is that only strong adhesive bonds between contacting solids were considered. In the present contribution, we therefore extent this framework to include weaker interfaces, which are expected at typical contacts due to lattice mismatch, surface passivation, or lubrication. We use atomistic simulations on an amorphous model material to propose a mechanism map based on material properties and local contact geometry for wear particle formation and surface damage at the single-asperity scale. Our results imply that the local slopes of rough surfaces govern a transition from asperity collisions with plastic damage and wear particle formation at high roughness to slip without significant damage for flatter surfaces, comparable to a run-in process.
000265642 700__ $$0251163$$aBrink, Tobias$$g289691
000265642 700__ $$0243317$$aMolinari, Jean-François$$g178549
000265642 7112_ $$aDPG Spring Meeting 2019$$cRegensburg, Germany$$d2019
000265642 8560_ $$ftobias.brink@epfl.ch
000265642 909C0 $$zPasquier, Simon$$xU10232$$pLSMS$$mbirgitte.seem@epfl.ch$$0252179
000265642 909CO $$ooai:infoscience.epfl.ch:265642$$pENAC$$ppresentation
000265642 960__ $$atobias.brink@epfl.ch
000265642 961__ $$aalessandra.bianchi@epfl.ch
000265642 973__ $$aEPFL$$sPUBLISHED
000265642 980__ $$aPOST_TALK
000265642 981__ $$aoverwrite