ANALYSIS OF THE MICROSTRUCTURE AND ENERGY ABSORPTION CAPACITY OF HIGH-MANGANESE TWIP STEEL DEFORMED UNDER STATIC AND DYNAMIC LOADING CONDITIONS

1 KOSTKA Michał
Co-authors:
2 JASIAK Katarzyna 1 KONOFOL Mikołaj 1 WESOŁOWSKI Mateusz 1 BEDNARCZYK Iwona 1 TKOCZ Marek 2 GRONOSTAJSKI Zbigniew 1 JABŁOŃSKA Magdalena B.
Institutions:
1 Silesian University of Technology, Gliwice, Poland, EU, michal.kostka@polsl.pl
2 Wrocław University of Science and Technology, Wrocław, Poland, EU
Conference:
33rd International Conference on Metallurgy and Materials, Orea Congress Hotel Brno, Czech Republic, EU, May 22 - 24, 2024
Proceedings:
Proceedings 33rd International Conference on Metallurgy and Materials
Pages:
125-130
ISBN:
978-80-88365-21-1
ISSN:
2694-9296
Published:
26th June 2024
Proceedings of the conference have been sent to Web of Science and Scopus for evaluation and potential indexing.
Metrics:
60 views / 66 downloads
Abstract

<div>The work concerns the analysis of the effect of deformation under static and dynamic conditions of high-manganese X42 steel with the SFE value of 24 mJ/m2 on energy absorption capacity and microstructure. X42 steel is graded as a steel that strengthens by mechanical twinning (TWIP effect). TWIP steels have an excellent combination of strength and ductility properties, making them an excellent material for use in controlled crumple zone components for vehicles. A static tensile test and a flywheel machine tensile test at a strain rate corresponding to dynamic conditions were carried out for the tested steel. Microstructure studies were carried out using light microscopy and scanning electron microscopy techniques. From the stress-strain curves, the value of the energy absorbed during plastic deformation was calculated. On the base of the tensile tests, it can be concluded that the material strengthens with the increase in strain rate without losing its good plastic properties. Analysis of the microstructure showed deformation effects in the form of austenite grains elongated in the direction of the tensile direction, within which mechanical twins and deformation bands are formed and the intensity of the generation of twins is correlated to the strain rate. The value of absorbed energy during plastic deformation of the tested steel is at a similar level compared to other TWIP steels expected to be used for structural components absorbing energy during impact.</div>

Keywords: TWIP steel, deformation, energy absorption, strain rate, twinning

© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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