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Metallurgist
Published in: Metallurgist 7-8/2018

15-11-2018

М/А-Constituent in Bainitic Low Carbon High Strength Steel Structure. Part 1

Authors: A. A. Kichkina, M. Yu. Matrosov, L. I. Éfron, D. A. Ringinen, I. V. Lyasotskii, E. V. Shul’ga, A. A. Efimov

Published in: Metallurgist | Issue 7-8/2018

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Abstract

Results are provided for experimental studies of conditions for the formation of various types of M/A-constituent (structural component consisting of martensite and austenite) in the microstructure of low-carbon pipe steel specimens produced by rolling with thermomechanical treatment (controlled rolling and accelerated cooling). As a result of experiments different types of M/A constituent are obtained and the temperature-time conditions for their formation are determined. A research procedure is developed making it possible with maximum confidence to determine the type, size and volume fraction of M/A-constituent in the microstructure. Depending on cooling conditions and exposure temperature, two critical states of the M/A-constituent are identified: at high exposure temperature, predominantly twinned martensite is formed, and austenite is formed at a low temperature. At intermediate temperatures, various combinations of these phases are observed, while the fraction of martensite in the composition of M/A “islands” decreases with decreasing exposure temperature, but the fraction of austenite increases.
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Metadata
Title
М/А-Constituent in Bainitic Low Carbon High Strength Steel Structure. Part 1
Authors
A. A. Kichkina
M. Yu. Matrosov
L. I. Éfron
D. A. Ringinen
I. V. Lyasotskii
E. V. Shul’ga
A. A. Efimov
Publication date
15-11-2018
Publisher
Springer US
Published in
Metallurgist / Issue 7-8/2018
Print ISSN: 0026-0894
Electronic ISSN: 1573-8892
DOI
https://doi.org/10.1007/s11015-018-0719-6

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