Berlin 2018 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MM: Fachverband Metall- und Materialphysik
MM 12: Topical Session (Symposium MM): Fundamentals of Fracture
MM 12.2: Vortrag
Montag, 12. März 2018, 16:15–16:30, TC 006
Damage in DP Steel - statistical in-situ analysis of brittle and ductile mechanisms prior to the onset of fracture — •Carl F. Kusche1, Martina Freund1, Tom Reclik1, Ulrich Kerzel2, Talal Al-Samman1, and Sandra Korte-Kerzel1 — 1Institut für Metallkunde und Metallphysik, RWTH Aachen, Germany — 2Lehrstuhl für Operations Research, RWTH Aachen, Germany
For the last years, analysing deformation damage in dual-phase steels has been a well-discussed topic; this is largely due to the ongoing rise in demand for high-strength steels with good ductility, allowing for a further optimization in weight reduction.
To reveal the micromechanical mechanisms of damage, the currently undergone methods of post-mortem analysis as well as in-situ methods deliver an incomplete picture; the first being unable to deliver data for the evolution of damage while classically, in-situ methods being spatially limited to the observation of few damage events. The novel approach in this work combines in-situ observation with an automated recognition and classification of micromechanical damage mechanisms. An algorithm based on machine learning is developed to achieve this methodical expansion, allowing the analysis of large deformed areas while at the same time maintaining spatial resolution. The in-situ experiment is enhanced by the possibility of generating statistically relevant data characterizing the mechanisms of fracture in brittle phases and ductile void formation on the microscale. Thus, exposing the evolution of predominant damage mechanisms during deformation yields a holistic approach to deformation damage.