Thermal Analysis of the Stress and Temperature Induced Phase Transformations in Steels

Abstract

The austenite phase decomposition of three plain carbon steels (0,18% C, 0,38 % C, 0,8 % C) and one medium alloyed steel (0,35 % C, 4 % Ni) subjected to tensile stresses have been investigated using simple thermal analysis jointly with its derivatives. The results indicate an overall increase in decomposition kinetics of austenite into Ferrite-pearlite for the plain carbon steels. In medium alloyed steel (4 % Ni), the M increases with the applied tensile stresses and austenitisation temperatures.