A note on the determination of the friction factor by means of the reduction-capacity test

Abstract

In this investigation a simple theoretical analysis of the solid compression test has been carried out so that the friction factor can be estimated quantitatively from the reduction-capacity test— the latter involves the compression of a cylindrical billet between flat parallel platens, using an energy-bound machine. Detailed experiments have been carried out on Armco iron to determine the friction factor using both the reduction-capacity test and the ring-compression test, in order to be able to obtain a comparative assessment of these two test methods. The results of the investigation indicate that if an aspect ratio of 2 or 2.5 is chosen in the reduction-capacity test, the friction factor corresponds with those obtained from standard ring-compression tests.