Effects of load ratio, R, and test temperature on high cycle fatigue behavior of nano-structured Al–4Y–4Ni–X alloy composites

• Published in: Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2012-12, Vol.558, p.211-216
• Main Authors: El-Shabasy, Adel B., Hassan, Hala A., Lewandowski, John J.
• Format: Article
• Language: English
• Subjects: Aluminum; Amorphous aluminum powders; Applied sciences; Bending fatigue; Composite materials; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Extrusion; Fatigue limit; Fully reversed fatigue tests; High cycle fatigue; Materials science; Materials synthesis; materials processing; Mechanical and acoustical properties of condensed matter; Mechanical properties of nanoscale materials; Metals. Metallurgy; Microstructure; Nanocrystalline materials; Nanoscale materials and structures: fabrication and characterization; Nanostructure; Nanostructured composite; Physics; Powder metallurgy. Composite materials; Production techniques
• ISSN: 0921-5093; 1873-4936
• DOI: 10.1016/j.msea.2012.07.114

Nanostructured Al–4Y–4Ni–X composites created by extruding atomized amorphous powders at different extrusion ratios were tested under high cycle bending fatigue at load ratios, R=0.1, 0.33 and −1 at room temperature, 149°C and 260°C. Increasing the extrusion ratio generally improved the fatigue life and the fatigue limits were well in excess of that obtained on conventional aluminum alloys at all temperatures tested. The fatigue limits obtained in this work were also compared to previously reported values for a nanostructured composite Al–Gd–Ni–Fe alloy produced via similar means.