Accuracy of pure copper flow curves determination in compression tests

Abstract

Comparison of experimental results obtained in two main compression test methods are presented in this paper. First method is so called Schofman procedure. Second method is near friction free compression test so called Rastegaev procedure, and there is used as referent. Schofman method is attractive with his bright idea of non experimental grapho-analytical elimination of friction, but experimental part is demanding and often problematic. Performed were Schofman compression test using pure copper samples, and proposed two variation of basic method. In second part of the experiment performed was Rastegaev compression test known as reliable and accurate, and classic compression test with existing of friction. After experimental results comparison and analysis, conclusions made about Schofman method, and especially about proposed corrections of basic procedure.