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

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 d...

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Bibliographic Details
Published in:Polish journal of chemical technology 2024-12, Vol.26 (4), p.34-38
Main Authors: Łazarska, Małgorzata, Piotrowska, Aleksandra, Paciorek-Sadowska, Joanna, Ranachowski, Zbigniew
Format: Article
Language:English
Subjects:
Acoustic emission
acoustic emission (AE)
Acoustic emission testing
Acoustics
Alloy steels
Austenite
Bainite
Boron
Design
dilatometric tests
Dilatometry
Extensometers
Ferritic stainless steels
Ferritic transformations
Industrial applications
Measurement techniques
microstructure
Phase transitions
Research methodology
Sensors
Steel 27MnCrB5
Steel alloys
Temperature
Waveguides
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Summary: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.
ISSN:1899-4741
1509-8117
1899-4741
DOI:10.2478/pjct-2024-0038