SKM 2023 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 15: Topical Session: Fundamentals of Fracture – Atomistic Studies of Fracture

MM 15.8: Vortrag

Dienstag, 28. März 2023, 12:30–12:45, SCH A 216

Atomistic study of fracture in Laves phases — •Alireza Ghafarollahi and Erik Bitzek — Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Straße 1, Düsseldorf 40237, Germany

Laves phases are intermetallic phases with complex structures that exist in many alloys and have a pronounced impact on their mechanical properties. Although these materials often exhibit superior mechanical properties at high temperatures, their applications as structural materials are limited due to their intrinsic brittleness at ambient temperature. Therefore, understanding the fundamental fracture mechanisms in Laves phases is crucial for tailoring their mechanical properties. Here, with the aid of atomistic simulations, the fracture behavior in C14 and C15 Laves phases is explored using NbCr_2 and MgZn_2 as model systems. In particular, different crack systems are analyzed and the corresponding fracture toughnesses are computed and compared with the Griffith theory.