Mechanical Properties of AlSi12-Based Metal Matrix Composites with Layered Metallic Glass Ribbons

Abstract:

During the last years, several studies proved the high potential of metallic glasses to be used as reinforcements in lightweight alloys. Thereby, focus was mostly on particle reinforced composites or three-dimensional and omnidirectional glass arrays within the composite. Using a specific layered structure of the entire ribbons as reinforcement to design direction-dependent tailored properties is a novel approach. The composites in this study were produced by gas pressure infiltration of a layered stack of metallic glass ribbons. Ribbons of the metallic glass Ni₆₀Nb₂₀Ta₂₀ were used as reinforcements and aluminum alloy AlSi12 as matrix. Mechanical tests like four point bending and tensile tests as well as elastic analysis using ultrasound phase spectroscopy (UPS) were performed to classify composite’s properties. Further, micro computed tomography (µCT) analysis and metallographic investigations were carried out on the four point bending samples after testing to reveal occurring damage mechanisms.

• Periodical: Key Engineering Materials (Volume 742)
• Pages: 181-188
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.742.181
• Online since: July 2017
• Authors: Klaudia Lichtenberg*, Kay André Weidenmann
• Keywords: Damage Mechanisms, Gas Pressure Infiltration, Mechanical Testing, Micro Computed Tomography (μCT), Microstructure

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