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Study the Effect of Lubrication on Hardness in the Ring Compression Test

N. Kachhara, M. A. Saloda, B. L. Salvi, C. Agarwal


This paper focuses on the hardness distribution in the mild steel ring specimens upset under rigid dies. Three different types of lubricants namely boric acid, Vaseline, grease and dry condition were employed as lubricants and the coefficient of friction corresponding to the lubricant employed was evaluated using standard ‘Ring compression test’. The strain distributions obtained from the simulation studies were used to predict the hardness of the ring specimen. It can be reported from the experimental and predicted results that the hardness is not uniform at surface the deformed ring specimen and it varies at the bulge head on the surface and along the neutral plane.

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