Title:	Effect of Double-Step and Strain-Assisted Tempering on Properties of Medium-Carbon Steel
Authors:	Salvetr, Pavel Školáková, Andrea Kotous, Jakub Drahokoupil, Jan Melzer, Daniel Jansa, Zdeněk Donik, Črtomir Gokhman, Aleksandr Nový, Zbyšek
Citation:	SALVETR, P. ŠKOLÁKOVÁ, A. KOTOUS, J. DRAHOKOUPIL, J. MELZER, D. JANSA, Z. DONIK, Č. GOKHMAN, A. NOVÝ, Z. Effect of Double-Step and Strain-Assisted Tempering on Properties of Medium-Carbon Steel. Materials, 2023, roč. 16, č. 5, s. nestránkováno. ISSN: 1996-1944
Issue Date:	2023
Publisher:	MDPI
Document type:	článek article
URI:	2-s2.0-85149830483 http://hdl.handle.net/11025/54841
ISSN:	1996-1944
Keywords in different language:	medium-carbon steel;tempering;strengthening;mechanical properties;microstructure
Abstract in different language:	The present work aimed to study the properties of medium-carbon steel during tempering treatment and to present the strength increase of medium-carbon spring steels by strain-assisted tempering (SAT). The effect of double-step tempering and double-step tempering with rotary swaging, also known as SAT, on the mechanical properties and microstructure was investigated. The main goal was to achieve a further enhancement of the strength of medium-carbon steels using SAT treatment. The microstructure consists of tempered martensite with transition carbides in both cases. The yield strength of the DT sample is 1656 MPa, while that of the SAT sample is about 400 MPa higher. On the contrary, plastic properties such as the elongation and reduction in area have lower values after SAT processing, about 3% and 7%, respectively, compared to the DT treatment. Grain boundary strengthening from low-angle grain boundaries can be attributed to the increase in strength. Based on X-ray diffraction analysis, a lower dislocation strengthening contribution was determined for the SAT sample compared to the double-step tempered sample.
Rights:	© The Author(s)
Appears in Collections:	Články / Articles (RAM) OBD

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