Phase Transformations in Alloy Steel Containing Boron Using Dilatometry and Acoustic Emission

Łazarska, Małgorzata; Piotrowska, Aleksandra; Paciorek-Sadowska, Joanna; Ranachowski, Zbigniew

doi:10.2478/pjct-2024-0038

Abstract

The tests were carried out for the selected 27MnCrB5-2 alloy steel with the addition of boron. The paper presents the kinetics of the ferritic transformation occurring under continuous cooling conditions. The temperatures of the beginning and end of the transformation of supercooled austenite were determined using a dilatometer. In addition, a waveguide and an acoustic sensor were installed in the device to receive acoustic emission signals. The results in the form of dilatometric curves were additionally confirmed by the obtained acoustic emission signals. Based on the obtained microstructural results, it can be concluded that in the hardening process of 27MnCrB5-2 steel at the applied temperatures, complex transformations of austenite into ferrite and bainite occur. The use of acoustic methods in the field of phase transformation issues creates the possibility of their application in industry.

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Phase Transformations in Alloy Steel Containing Boron Using Dilatometry and Acoustic Emission

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