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DTSTAMP:20260825T180541Z
UID:https://www.mpie.de/events/20120/3755656
DTSTART:20190827T113000Z
DTEND:20190827T123000Z
CLASS:PUBLIC
CREATED:20190826T162353Z
DESCRIPTION:While the general principles underlying the plastic response of
  metals are mostly understood—especially for the crystalline state—adv
 anced tailoring of their properties and the development of novel\, high-pe
 rformance materials requires detailed insights into the mechanisms at the 
 atomic scale. This talk will discuss how computer models and simulations c
 an be the tools of choice to discover such mechanisms in the context of ou
 r work on amorphous metals and wear. I will first introduce some concepts 
 of molecular dynamics computer simulations and how we used them to investi
 gate the plastic deformation of metallic crystal/glass composites\, where 
 localized and collective shear transformations govern the macroscopic beha
 vior. In particular\, I will address the questions of when and how precipi
 tates can enhance the mechanical properties of metallic glasses and what t
 he difference between a nanocomposite and a nanocrystal is. In the second 
 part\, I will discuss our current work on wear of materials and what to do
  when the time and length scale limitations of molecular dynamics become a
  problem. When surfaces in contact slide relative to each other\, they are
  in fact only in contact in some small areas due to their roughness. At th
 is length scale\, we employ molecular dynamics with different model materi
 als in order to elucidate how detachment of matter occurs in the form of i
 ndividual particles\, which in the end comes down to the details of nanosc
 ale plasticity and fracture processes. In order to gain insights on releva
 nt figures of merit for applications\, though\, we have to collect statist
 ics of wear particle formation at the meso to macroscale\, using continuum
  methods. Since some of this work is in its early stages\, I will finish t
 he talk with a preview of promising future research directions and methods
 \, such as taking the microstructure evolution of the material into accoun
 t.\nSpeaker: Dr. Tobias Brink
LAST-MODIFIED:20190826T164030Z
LOCATION:Max-Planck-Institut für Eisenforschung GmbH\, Room: Large Confere
 nce Room No. 203
ORGANIZER;CN=Prof. Gerhard Dehm   :mailto:
SUMMARY:Molecular dynamics simulations and beyond for plasticity and wear o
 f metals:  <i>Molecular dynamics simulations and beyond for plasticity and
  wear of metals</i>
URL;VALUE=URI:https://www.mpie.de/events/20120/3755656
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