Table 1: Conditions and hardness of alloys and composites tested for sliding wear behaviour.

SampleConditionHardness (HB)

2014 Alloy system
 AlloyAs cast86.6 ± 6
 AlloyAged at 210°C for 3 hours114.2 ± 4
 AlloyAged at 240°C for 3 hours109.4 ± 3
 Composite As cast83.4 ± 2
 Composite Aged at 180°C for 3 hours124.2 ± 7

7075 Alloy system
 AlloyAs cast96.6 ± 3
 AlloyT6 ageing condition137.6 ± 4
 AlloyRetrogressed and reaged71.0 ± 3
 Composite As cast101.2 ± 4
 Composite T6 ageing condition99.2 ± 3
 CompositeRetrogressed and reaged72.1 ± 3