Dresden 2026 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 18: Liquid and Amorphous Materials II

MM 18.5: Talk

Tuesday, March 10, 2026, 15:00–15:15, SCH/A315

Macroscopic response of Pd₄₀Ni₄₀P₂₀ Bulk Metallic Glasses to GeV ²³⁸U Ion irradiation — •Richard von Destinon, Maren Jeromin, Marilena Tomut, and Gerhard Wilde — Institut für Materialphysik, Universität Münster, Münster, Germany

Ion tracks formed by localized heating due to intense electronic excitations of the target atoms offer new pathways to tailor the mechanical properties of bulk metallic glasses. In this work, we investigate the effects of swift heavy ion irradiation on macroscopic behavior such as the hardness, swelling and strain-rate sensitivity on the well-characterized bulk metallic glass Pd₄₀Ni₄₀P₂₀. The samples were thermally relaxed at 0.94T_g and subsequently irradiated with 1.14 GeV U ions at the UNILAC accelerator at GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt. By using aluminum degraders of different thicknesses, the energy loss of the ions at the sample surface and their corresponding penetration depths were systematically varied. Characterization was carried out using Laser Scanning Microscopy (LSM) as well as nanoindentation with displacement depths up to 0.3 µm. The results show a pronounced increase of swelling as well as a decrease in hardness with increasing irradiation fluences. The strain-rate-sensitivity increases at higher fluences, suggesting that the increased structural heterogeneity within the irradiated metallic glass alters the local stress distribution, affecting the shear band propagation.

Keywords: Bulk Metallic Glass; GeV Ion irradiation; Nanoindentation