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DTSTAMP:20260611T194924Z
UID:https://www.mpie.de/events/35854/2768772
DTSTART:20231106T100000Z
DTEND:20231106T110000Z
CLASS:PUBLIC
CREATED:20231024T155938Z
DESCRIPTION: The persistent demand for green\, strong and ductile advanced 
 high strength steels\, with a reduced climate footprint\, calls for novel 
 and improved multi-phase microstructures. The development of these new ste
 els requires an in-depth understanding of the governing plasticity mechani
 sms at the micron scale. In order to address this challenge\, novel numeri
 cal-experimental methods are called for that account for the discreteness\
 , statistics and the intrinsic role of interfaces. This lecture sheds ligh
 t on recent and innovative developments unravelling metal plasticity at th
 e micron scale. Multi-phase through-thickness samples allow for a full cha
 racterization of the underlying microstructure. Using computational crysta
 llographic insights\, a slip system based local identification method has 
 been developed\, which provides full-field crystallographic slip system ac
 tivity maps. The resulting deformation maps are directly used to assess th
 e model predictions. Heterogeneous spatial variations are introduced by sa
 mpling the slip system properties of individual atomic slip planes from a 
 probability density function. This allows to recover naturally localized s
 lip patterns with a high resolution. It is demonstrated that this discrete
  slip plane model adequately replicates the diversity of active slip syste
 ms in the corresponding experiment\, which cannot be achieved with standar
 d crystal plasticity models. Recent experimental observations on dual-phas
 e steels demonstrate substructure boundary sliding parallel to the habit p
 lane in lath martensite\, for which a habit-plane slip enriched laminate m
 odel is developed. This model adequately captures the role of the substruc
 ture boundary sliding on the deformation of the martensite aggregate.\nSpe
 aker: Professor Marc Geers 
LAST-MODIFIED:20231024T160825Z
LOCATION:Max-Planck-Institut für Eisenforschung GmbH\, Room: Large Confere
 nce Room No. 203
ORGANIZER;CN=on invitation of Prof. Gerhard Dehm:mailto:
SUMMARY: High-resolution micro-plasticity in advanced high-strength steels 
URL;VALUE=URI:https://www.mpie.de/events/35854/2768772
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