Hydrogen effects on the deformation and fracture of alloys

MPI SusMat Colloquium

  • Date: Jun 18, 2024
  • Time: 05:00 PM - 07:00 PM (Local Time Germany)
  • Speaker: Prof. Christian Motz
  • Head of Chair of Experimental Methods in Material Science, Department of Material Science and Technology, Saarland University
  • Location: Max-Planck-Institut für Nachhaltige Materialien GmbH
  • Room: Large Conference Room No. 203 / Online
  • Host: on invitation of Prof. Gerhard Dehm
 Hydrogen effects on the deformation and fracture of alloys
The increasing demand on lightweight structures requires high-strength materials. However, with increasing strength many materials show an increasing susceptibility to hydrogen embrittlement. Hence, it is of vital interest to understand the mechanisms of hydrogen embrittlement.

Hence, we tried to study the interaction between crystal defects (e.g. grain
boundaries and dislocations) with hydrogen atoms. For this reason, we developed several techniques in order to quantify
the impact of hydrogen on material properties like elastic modulus, hardness, activation energy for dislocation nucleation
and diffusion of hydrogen. Furthermore, emphasis was also laid on the global and local detection of hydrogen. Results of
this work could be used for GB engineering by thermo-mechanical processing or new sophisticated processing techniques
to generate a high fraction of special grain boundaries that exhibit a strong resistance to embrittlement.

Please register for participation: https://plan.events.mpg.de/e/susmet_motz

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