Location of Repository

Lubricated sliding wear behaviour of aluminium alloy composites

By J.C. Walker, W.M. Rainforth and H. Jones


Interest in aluminium alloy (Al-alloy) composites as wear resistant materials continues to grow. However, the use of the popular Al-alloy-SiC composite can be limited by the abrasive nature of the SiC, leading to increased counterface wear rates. This study reports new Al-alloy composites that offer high wear resistance, to a level similar to Al-alloy-SiC. Aluminium alloy (2124, 5056) matrix composites reinforced by nominally 15 vol.% of Cr3Si, MoSi2, Ni3Al and SiC particles were prepared by a powder metallurgy route. The aluminium alloy matrix was produced by gas atomisation, and the Cr3Si, MoSi2 and Ni3Al were prepared by self-propagating high temperature synthesis (SHS), while the SiC was from a standard commercial supply. Following blending, the particulates were consolidated by extrusion, producing a homogenous distribution of the reinforcement in the matrix. Wear testing was undertaken using a pin-on-ring configuration against an M2 steel counterface, with a commercial synthetic oil lubricant, at 0.94 m/s and a normal load of 630 N, corresponding to initial Hertzian contact pressures of 750–890 MPa (the exact value depending on the material properties). Specific wear rates at sliding distances exceeding 400 km were in the range 4.5–12.7 × 10?10 mm3/Nm. The monolithic alloys gave the highest specific wear rates, while the MoSi2 and Cr3Si reinforced alloys exhibited the lowest. The worn surface has been analysed in detail using focused ion beam (FIB) microscopy to determine the sub-surface structural evolution and by tomographic reconstruction of tilted scanning electron microscopy (SEM) images, to determine the local worn surface topography. Consequently, the wear mechanisms as a function of alloy composition and reinforcement type are discussed.<br/><br/

Year: 2005
OAI identifier: oai:eprints.soton.ac.uk:157733
Provided by: e-Prints Soton

Suggested articles



  1. (1990). Ageing effects on the wear behaviour of P/M aluminium alloy SiC particulate composites,
  2. (1976). Aluminium matrix composites: Fabrication and properties, doi
  3. (1982). Composites of aluminium alloys: Fabrication and wear behaviour, doi
  4. (2004). Contrast differences between scanning ion and scanning electron microscope images, doi
  5. (1998). Contrast mechanisms in scanning ion microscope imaging for metals, doi
  6. Dispersion of NiAl intermetallic compound and Si3N4 in die castings for increased wear resistance, in:
  7. (2005). Dry sliding wear behaviour of some wrought, rapidly solidified powder metallurgy aluminium alloys, Submitted to, doi
  8. (1992). Dry sliding wear of A356-Al-SiCp composites, doi
  9. (1995). Dry sliding wear of discontinuously reinforced aluminium composites: review and discussion, doi
  10. (2001). Dry wear behaviour and its relation to microstructure of novel 6092 aluminium alloy-Ni3Al powder metallurgy composite, doi
  11. (1994). Effect of microstructure and counterface material on the sliding wear resistance of particulate reinforced aluminium matrix composites, doi
  12. (2002). Mechanical properties of some PM aluminide and silicide reinforced 2124 aluminium matrix composites, doi
  13. (1997). Microstructural changes induced by dry sliding wear of a A357/SiC metal matrix composite, doi
  14. (1998). MMCs:
  15. (1996). Ni3Al intermetallic particles as wear-resistant reinforcement for Al-base composites processed by powder metallurgy, doi
  16. (1990). Sliding and abrasive wear behaviour of an aluminium (2014) - SiC particle reinforced composite, doi
  17. (2002). Sliding wear behaviour of novel AA2124 aluminium alloy/Ni3Al composites, doi
  18. (1992). Sliding wear of an Al alloy SiC whisker composite, doi
  19. (1995). The effect of alumina fibre reinforcement on the wear of an Al-4.3%Cu alloy, doi
  20. (1992). The effect of particulate reinforcement on the sliding wear behaviour of aluminium matrix composites, doi
  21. (1964). The elastic modulus of fibre reinforced materials, J.Appl.Mech (Trans. ASME) doi
  22. (1996). The sliding wear behaviour of Al-SiC particulate composites-I. doi
  23. (1997). The sliding wear resistance behaviour of NiAl and SiC particles reinforced aluminum alloy matrix composites, doi
  24. (1994). The wear properties of an alumina-aluminosilicate fibre hybrid reinforced Al-Si alloy in a lubricated condition, doi
  25. (1991). Transition wear behaviour of SiC-particulate and doi
  26. (1994). Tribological application of MMC for reducing engine weight, doi
  27. (1992). Tribology, Butterworth-Heinemann, doi
  28. (1999). Wear behaviour of aluminium reinforced with nickel aluminide MMCs, doi

To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.