The paper describes the evolution of surface pressure and temperature transducers to a level of sophistication and reliability such that they can be used in the investigation of lubrication in sheet-rolling processes. The paper cites the development of these techniques from their inception (where they were used solely in the elastohydrodynamic regime) to their current application in the plastohydrodynamic and boundary lubrication regimes characteristic of sheet-rolling operations. The pressure and temperature data determined, using the transducers in experiments involving the rolling of steel sheet, show significant variation throughout the contact zone and these data are particularly influenced by changes in the lubricant and the deformation-process conditions.

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