SKM 2023 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 20: Topical Session: Fundamentals of Fracture – Microstructure Impact on Fracture (Experiments)
MM 20.4: Vortrag
Dienstag, 28. März 2023, 15:00–15:15, SCH A 216
Three-dimensional characterization of damage sites and strain dependence in dual phase steel — •Setareh Medghalchi1, Binbin Lin2, Joscha Kortmann1, Bai-Xiang Xu2, Ulrich Kerzel3, and Sandra Korte-Kerzel1 — 1Institute for Physical Metallurgy and Materials Physics, RWTH Aachen University, Aachen, Germany — 2Mechanics of Functional Materials Division, Institute of Materials Science, Technische Universität Darmstadt, Darmstadt, Germany — 3Fakultät für Georessourcen und Materialtechnik, RWTH Aachen University, Aachen, Germany
High performance materials like dual phase steels possess a heterogeneous microstructure resulting in the unique interplay between the two phases. High resolution scanning electron microscopy serves as a tool to unravel many of the microscale properties related to the deformation and mechanical properties of these materials. Damage sites in the microstructure serve as the main controlling feature during deformation. There are two fronts to tackle for a deeper understanding of the global damage accumulation: First, bringing high resolution analysis to large scales, and second, moving from two dimensional to three-dimensional characterization. We approach this challenge by employing slice-and-view SEM sectioning in combination with automated convolutional neural networks. With the knowledge of the damage occurring in different positions with various local conditions, we combine some related parameters to capture not only the trajectory of the damage sites inside the volume of the sample, but also the relative local stress-strain distribution condition.