Studies on wear behavior of nano-intermetallic reinforced Al-base amorphous/nanocrystalline matrix in situ composite

• Published in: Wear 2009-05, Vol.266 (11), p.1113-1118
• Main Authors: Roy, D., Singh, S.S., Basu, B., Lojkowski, W., Mitra, R., Manna, I.
• Format: Article
• Language: English
• Subjects: Al–Ti–Si alloy; Amorphous matrix composites; Applied sciences; Exact sciences and technology; Fretting wear; Friction, wear, lubrication; Hardness; Machine components; Mechanical engineering. Machine design; Nano-intermetallic
• ISSN: 0043-1648; 1873-2577
• DOI: 10.1016/j.wear.2009.03.015

Resistance to wear is an important factor in design and selection of structural components in relative motion against a mating surface. The present work deals with studies on fretting wear behavior of in situ nano-Al 3Ti reinforced Al–Ti–Si amorphous/nanocrystalline matrix composite, processed by high pressure (8 GPa) sintering at room temperature, 350, 400 or 450 °C. The wear experiments were carried out in gross slip fretting regime to investigate the performance of this composite against Al 2O 3 at ambient temperature (22–25 °C) and humidity (50–55%). The highest resistance to fretting wear has been observed in the composites sintered at 400 °C. The fretting wear involves oxidation of Al 3Ti particles in the composite. A continuous, smooth and protective tribolayer is formed on the worn surface of the composite sintered at 400 °C, while fragmentation and spallation leads to a rougher surface and greater wear in the composite sintered at 450 °C.