Berlin 2024 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 36: Liquid and Amorphous Materials I
MM 36.1: Vortrag
Mittwoch, 20. März 2024, 11:45–12:00, C 243
Influence of SRO and MRO on the plastic deformation behavior of amorphous metals — •Valeria Lemkova1,2, Florian Spath1, Pia Weihing1, Tobias Thielen1, Christian Motz1, Florian Schäfer1, and Ralf Busch2 — 1Materials Science and Methods, Saarland University Campus D2 3, 66123 Saarbruecken, Germany — 2Metallic Materials, Saarland University Campus C6 4, 66123 Saarbruecken, Germany
The plastic deformation behavior of amorphous metals is not yet fully understood. In particular, shear transformation zones (STZ) are at the center of the discussion. In order to better understand and characterize them, nanoindentation was used to determine the so-called pop-in behavior as well as the strain rate sensitivity (SRS). The SRS provides information on the interaction of the STZ and shear band formation, while the pop-ins are directly related to STZ formation, i.e., the plastic deformation behavior. Strain rate tests were carried out on different amorphous metals, in particular Zr-based (ZrCuNiAlTi) and Ti-based (TiZrCuSAl), with different short range (SRO) and medium range order (MRO) determined via scattering experiments. In the results the correlation between SRO / MRO and the plastic deformation behavior is evaluated and discussed.
Keywords: amorphous metals; nanoindentation