en Research Paper Research Paper <p>Abstract: In this research work, crystallization kinetics of Fe55Cr18Mo7B16C4 alloy was evaluated by X-ray diffraction, TEM observations and differential scanning calorimetric tests. In practice, crystallization and growth mechanisms were investigated using DSC tests in four different heating rates. Results showed that a two -step crystallization process occurred in the alloy in which - Fe phase was crystallized in the first step after annealing treatments. Activation energy for the first step of crystallization i.e. - Fe was measured to be 276 (kj/mol) according to Kissinger model. Further, avrami exponent calculated from DSC curves was 2 and a three -dimensional diffusion controlled mechanism with decreasing nucleation rate was observed in the alloy. It is also known from the TEM observations that crystalline á – Fe phase nucleated in the structure of the alloy in an average size of 10 nm and completely mottled morphology.</p> Keywords: Bulk Metallic Glasses (BMGs); Structural amorphous steels (SASs); Avrami exponent; Kinetic models 25 29 http://ijmse.iust.ac.ir/browse.php?a_code=A-10-3-134&slc_lang=en&sid=1 S. Ahmadi, 180031947532846001153 180031947532846001153 No H. R. Shahverdi* * shahverdi@modares.ac.ir 180031947532846001154 180031947532846001154 Yes S. S. Saremi 180031947532846001155 180031947532846001155 No