Co-authors SMETANA Bedřich, ZLÁ Simona, DOBROVSKÁ Jana, GRYC Karel, MICHALEK Karel & DUDEK Rostislav

Differential thermal analysis (DTA) is one of the methods that are suitable for obtaining thermo-physical and themo-dynamical data. Determination of temperatures and latent heats of phase transformations of metallic systems is possible using this method. This paper deals with the influence of the experimental conditions settings of the used DTA method in connection with obtained data. The paper is focused on the study of heating/cooling rate and sample mass influence on shift of phase transformations temperatures of “pure Fe”. Research was aimed on both low temperature and high temperature region. Curie point, eutectoid transformation, alpha-gamma, gamma-delta and melting region was studied. DTA measurements were realised using Setaram Setsys 18TM laboratory system. Controlled rate of heating/cooling of “pure Fe” samples (with different mass) was conducted: 1, 2, 5, 10, 20 °C.min-1. On the basis of adjusted experimental conditions (different heating/cooling rates and different sample masses), the experimental data set was obtained and corresponding dependencies were derived. Using corresponding dependencies the corrections can be applied to lower experimental conditions influence of studied data for investigated alloys (samples). Application of derived dependencies can substantially lead to lowering (minimizing) the experimental conditions influence and extrapolation to the so called “zero” mass and “zero” heating rate is possible.