Features of Metal Strain Resistance Determination under Controlled Loading

Abstract

Modernization of a cam-type rheometer consisting in equipping it with digital control electric drive and a system of data collection and processing on a PC is discussed. Modernization provided increased accuracy of speed reproducibility and reduced mechanical load on the kinematic transmission and nodes of the rheometer. The reliability of hardening curves of tested metals and alloys also increased. A new method of plastometric testing for upsetting square cross-section sample sis developed. Comparative tests of the proposed and conventional cylindrical samples of carbon steels in a wide range of temperatures and strains showed the validity of the method and good convergence of the results obtained for both types of samples under similar conditions. The new technique simplifies the procedure of sample manufacturing from square cross-section billets.