Seizure pressure and sliding velocity diagrams on tribological behavior of Al alloy composites in as-cast and heat-treated conditions

• The allowable pressure decreases with increasing sliding velocity.
• Heat treatment has no significant influence on seizure pressure.
• Performance wise the alloy system may be arrange in the form of 7010>7009>2014.

The conventional way of rating the performance of a material subjected to sliding wear is in the form of P–V diagram. The seizing of material is due to changing in the elastic limit and flow stress due to thermal softening and in due course due to cold welding in localized region between the two surfaces. Because of these interactions the allowable pressure decreases with increase in velocity and vice versa. It is to be observed that simply by heat treatment of alloy the seizure resistance is enhanced by 12.5% and further 22.2% by dispersion of 10 wt% of SiCp to alloy. All these facts are discussed on the basis of prevailing wear mechanism.