论文信息 - Particle effects on friction and wear of aluminium matrix composites

Particle effects on friction and wear of aluminium matrix composites

Particle effects on friction and wear of 6061 aluminium (6061 Al) reinforced with silicon carbide (SiC) and alumina (Al2O3) particles were investigated by means of Vickers microhardness measurements and scratch tests. Unreinforced 6061 Al matrix alloy was also studied for comparison. To explore the effect of heat treatment, materials subjected to three different heat treatment conditions, i.e. under-aged, over-aged and T6, were used. Multiplescratch tests using a diamond and a steel indentor were also carried out to simulate real abrasive wear processes. Vickers microhardness measurements indicated that T6 heattreated composites had the highest hardness. Single-scratch tests showed that the variation of friction coefficient was similar to that of Vickers hardness and the peak-aged composites exhibited the best wear resistance. The wear rate of fine particle-reinforced composites was mainly affected by hardness. However, the wear rate of large particle-reinforced composites was influenced by both the hardness and fracture of the particles.

[1] K. Ludema,et al. Wear of materials , 1977 .

[2] C. A. Brookes,et al. Some observations on scratch and indentation hardness measurements , 1972 .

[3] J. Bi,et al. Abrasive wear of discontinuous SiC reinforced aluminum alloy composites , 1991 .

[4] Su-Jien Lin,et al. Effect of aging on abrasion rate in an AlZnMgSiC composite , 1988 .

[5] C. Badini,et al. Natural aging characteristics of aluminium alloy 6061 reinforced with SiC whiskers and particles , 1991 .

[6] E. Rabinowicz,et al. Friction and Wear of Self-Lubricating Metallic Materials , 1975 .

[7] B. Lawn,et al. A model for the wear of brittle solids under fixed abrasive conditions , 1975 .

[8] A. J. Sedriks,et al. Mechanics of cutting and rubbing in simulated abrasive processes , 1963 .

[9] H. Rack,et al. Abrasive wear of silicon carbide particulate- and whisker- reinforced 7091 aluminum matrix composites , 1991 .

[10] S. Chan,et al. Abrasive wear of powder metallurgy Al alloy 6061-SiC particle composites , 1992 .

[11] K. Gahr,et al. Microstructure and Wear of Materials , 1987 .

[12] J. Archard. Contact and Rubbing of Flat Surfaces , 1953 .

[13] John A. Williams,et al. The generation of wear surfaces by the interaction of parallel grooves , 1992 .

[14] Mai Yiu-wing,et al. Modelling friction and wear of scratching ceramic particle-reinforced metal composites , 1994 .