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MM: Fachverband Metall- und Materialphysik

MM 28: Mechanical properties

MM 28.3: Vortrag

Donnerstag, 20. März 2025, 10:45–11:00, H23

Normal stress effect on the slip system of Mg alloys with long-period stacking ordered structures — •Naoki Uemura¹ and Ryosuke Matsumoto² — ¹Nagamori Institute of Actuators, Kyoto University of Advanced Science, Kyoto, Japan — ²Department of Mechanical and Electrical Systems Engineering, Faculty of Engineering, Kyoto University of Advanced Science, Kyoto, Japan

Mg alloys with long-period stacking, which have a unique structure with synchronized concentration modulation and structural modulation are attracting attention for their high strength. Various studies are currently being conducted to understand their high mechanical properties and plastic deformation behaviors. We investigated the tensile and compressive dependence of the stacking fault energy (SFE) by using first-principles calculations for the Mg-Y-Zn system, which is a typical LPSO-Mg alloy. As with hcp-Mg, the change in SFE due to tensile and compressive loading was greater on the basal plane than on the prismatic plane. This work was supported by JST, CREST Grant Number JPMJCR2094, Japan.

Keywords: Magnesium alloy; Long-period stacking ordered; Stacking fault energy; First-principles calculation