Dresden 2020 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 30: Poster Session II

MM 30.29: Poster

Tuesday, March 17, 2020, 18:15–20:00, P4

Molecular dynamics study of impact welding processes — •Benedikt Philipp Eggle-Sievers, Tobias Stegmüller und Ferdinand Haider — Universität Augsburg, Institut für Physik, Universitätsstraße 1 86159 Augsburg

Impact welding processes like explosive welding or magnetic pulse welding allow for the joining of different materials in a fast and reliable fashion. In the presented work, such joints between Al and Cu are investigated by the means of molecular dynamics simulations. The process of impact welding is divided into two stages, the loading and the unloading stage. The MD model consists of two plates forming a typical impact angle between 5^∘ and 30^∘. Besides the impact velocity, typically being several hundreds of meters per second, the angle is the parameter to vary. Another investigated phenomenon is the formation of a jet between both plates. It is an open question of ongoing research, whether the jetting can be traced back to the surrounding atmosphere, or to flaking and local melting of the material whilst the collision. In the presented work, the influence of the brittle oxide layer on the Al-surface is considered, requiring advanced potentials with the capability to capture the properties of metallic as well as of covalent–ionic bonds.