Abstract
To study the tribological behaviour of materials subjected to variable and constant loading the pin-on-disk tribometer has been modified. This paper discusses the wear and friction behaviour of Poly Tetra Fluoro Ethylene (PTFE) operating under variable loading dry unidirectional sliding condition using the modified tribometer. The results under variable loading are compared with corresponding maximum, minimum and mean constant load situations. Wear and specific wear rate of PTFE subjected to variable loading under dry unidirectional sliding condition lies above those of corresponding mean constant load but no such comparative behaviour was observed for coefficient of friction.
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