1NEW EXPERIMENTAL EVIDENCE ON THE INCOMPLETE TRANSFORMATION PHENOMENON IN STEEL

dimensional atom probe (3DAP) The aim of this work is to analyse the carbon distribution in austenite during isothermal bainite formation and the incomplete reaction phenomenon by means of X-ray diffraction analysis and atom-probe tomography in high silicon, manganese alloyed steels. Results will provide new evidence on the temporary cessation of bainitic ferrite formation at abnormally low transformation temperatures. The incomplete reaction phenomenon is defined as the temporary cessation of ferrite formation before the fraction of austenite transformed to ferrite, allowed by the lever rule in the absence of carbide precipitation at ferrite/austenite boundaries, is reached [1]. Over the last 25 years, this phenomenon has been an important issue on the definition of bainit