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MM: Fachverband Metall- und Materialphysik

MM 23: Poster II

MM 23.18: Poster

Tuesday, March 28, 2023, 18:15–20:00, P2/OG1+2

Effect of micro-alloying and structural relaxation on the nanoindentation behavior of Pd-based metallic glasses — •Richard von Destinon, Martin Peterlechner, and Gerhard Wilde — Institut für Materialphysik, Westfälische Wilhelms-Universität Münster, Münster, Germany

Two methods rising in interest to modify the mechanical properties of metallic glasses consist of micro-alloying as well as relaxation. We study the influence of structural relaxation and 1 at.% additions of Fe or Co on the well-researched metallic glass Pd₄₀Ni₄₀P₂₀. The relaxation states are created by quenching from temperatures above T_g with different cooling rates. The samples are analyzed using nanoindentation with force ranges up to 1 mN. Correlations between the change in mechanical properties, such as hardness and young’s modulus, and the shear deformation behavior through the pop-in distribution are investigated in detail. The results indicate that both, micro-alloying and relaxation increase the hardness of the material significantly, while the pop-in frequency remains insensitive to either.