SKM 2023 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 33: Topical Session: Fundamentals of Fracture – Amorphous Metals

MM 33.2: Talk

Wednesday, March 29, 2023, 16:00–16:15, SCH A 215

Liquid metal induced fracture : modelling and supporting experiments — Thierry Auger¹, Antoine Clement¹, Marco Ezequiel², •Eva Héripré¹, Ingrid Serre², Zehoua Hamouche¹, Julie Bourgon³, Eric Leroy³, and Maxime Vallet⁴ — ¹PIMM/Arts et Métiers Technology Institute, CNRS, CNAM, 151 Bd de l'hôpital 75013 Paris, France — ²Univ. Lille, CNRS, INRAE, Centrale Lille, UMR 8207 - UMET - Unité Matériaux et Transformations, F-59000 Lille, France — ³ICMPE - UMR 7182 2/8, rue Henri Dunant 94320 Thiais, France — ⁴MSSMAT, CentraleSupélec, University Paris-Saclay, France

Liquid metal embrittlement of an otherwise ductile material is an environmentally induced fracture phenomenon characterized by potentially high brittle crack propagation rate and deleterious effects on mechanical properties. Its phenomenology is still not well understood, in particular in terms of prediction of sensible couples and about the detailed intergranular fracture mechanisms. Here we will report on the study in the copper systems via both an energetic and QM/MM approaches at the atomic level to predict the sensitivity of model materials to liquid metal embrittlement. The main goal is to try to link micro-testing (flexion in FIB prepared samples or by in-situ TEM) to a sound modelling at the atomistic scale via fracture mechanics type sollicitations. The progress towards predictability of liquid metal embrittlement systems and understanding of fracture mechanisms will be presented along with a vision about their experimental validation.