Production and mechanical properties of metallic glass-reinforced Al-based metal matrix composites

• Published in: Journal of materials science Vol. 43; no. 13; pp. 4518 - 4526
• Main Authors: Scudino, S., Surreddi, K. B., Sager, S., Sakaliyska, M., Kim, J. S., Löser, W., Eckert, J.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01-07-2008; Springer; Springer Nature B.V
• Subjects: Aluminum matrix composites; Amorphous materials; Applied sciences; Bulk density; Characterization and Evaluation of Materials; Chemistry and Materials Science; Classical Mechanics; Cross-disciplinary physics: materials science; rheology; Crystallography and Scattering Methods; Exact sciences and technology; Hot extrusion; Materials Science; Mechanical properties; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology; Melt spinning; Metal matrix composites; Metallic glasses; Metals. Metallurgy; Other topics in materials science; Physics; Polymer Sciences; Powder metallurgy; Ribbons; Solid Mechanics; Strain; Tapes (metallic); Exothermic Differential Scanning Calorimetry Peak; Supercooled Liquid Region; Glassy Ribbon; Glassy Phase; Glass Reinforcement; Mechanical properties; Metallic glasses; Amorphous alloy; Composite materials
• ISSN: 0022-2461; 1573-4803; 1573-4803
• DOI: 10.1007/s10853-008-2647-5

Al-based metal matrix composites were synthesized through powder metallurgy methods by hot extrusion of elemental Al powder blended with different amounts of metallic glass reinforcements. The glass reinforcement was produced by controlled milling of melt-spun Al
85
Y
8
Ni
5
Co
2
glassy ribbons. The composite powders were consolidated into highly dense bulk specimens at temperatures within the supercooled liquid region. The mechanical properties of pure Al are improved by the addition of the glass reinforcements. The maximum stress increases from 155 MPa for pure Al to 255 and 295 MPa for the samples with 30 and 50 vol.% of glassy phase, respectively. The composites display appreciable ductility with a strain at maximum stress ranging between 7% and 10%. The mechanical properties of the glass-reinforced composites can be modeled by using the
iso-stress
Reuss model, which allows the prediction of the mechanical properties of a composite from the volume-weighted averages of the components properties.