NEW CONCEPTS OF BAINITIC AND MARTENSITIC TRANSFORMATIONS IN STEELS BASED ON MULTISTEP GAMMA-ALPHA TRANSFORMATION / SCHASTLIVTSEV VM,MIRZAYEV DA,KARZUNOV SE,YAKOVLEVA IL // ISIJ INTERNATIONAL. - 1995. - V. 35, l. 8. - P. 955-961.

ISSN/EISSN:

0915-1559 / нет данных

Type:

Review

Abstract:

The features of the gamma-alpha transformation under isothermal conditions and during continuous cooling for a wide range of rates (0.1-500 000 K/s) were studied on Fe-C alloys, on chromium steels containing up to 0.4\% C and 4.3; 6.6 and 9.4\% Cr and on some low-carbon alloyed steels. It is established that there are discrete, staged kinetics of the gamma-alpha transformation in Fe-Cr alloys and alloyed steels. The transition from a diffusionless transformation to a bainite transformation in low-carbon chromium steels is examined. All the results on the kinetics of the gamma-alpha transformation are obtained for iron alloys which show that, there are four stages of the transformation in steels and suggest a connection between the formation of upper and lower bainite and the transformation at stages II and III observed in pure Fe, respectively. A theory is developed which explains the two-stage dependence of the starting point of the martensitic transformation in structural steels on the cooling rate by the change in the interaction of the moving gamma-alpha boundary with carbon atoms. The upper temperature stage of the transformation is realized in conditions where growth is blocked by carbon atoms, the lower temperature stage-when the interphase boundary separates from the impurity atmosphere.

Author keywords:

GAMMA-ALPHA TRANSFORMATION; BAINITIC TRANSFORMATION; MARTENSITE START TEMPERATURE; INTERPHASE BOUNDARY GAMMA->ALPHA TRANSFORMATION; PECULIARITIES; ALLOYS

DOI:

10.2355/isijinternational.35.9

Web of Science ID:

ISI:A1995RU44500003

Соавторы в МНС:

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Другие поля

Поле	Значение
Publisher	IRON STEEL INST JAPAN KEIDANREN KAIKAN
Address	9-4 OTEMACHI 1-CHOME CHIYODA-KU, TOKYO 100, JAPAN
Language	English
Keywords-Plus	GAMMA->ALPHA TRANSFORMATION; PECULIARITIES; ALLOYS
Research-Areas	Metallurgy \& Metallurgical Engineering
Web-of-Science-Categories	Metallurgy \& Metallurgical Engineering
ResearcherID-Numbers	Schastlivtsev, Vadim/I-5825-2013 Yakovleva, Irina/J-6793-2013 Mirzaev, Dzhalal/E-1697-2013
ORCID-Numbers	Schastlivtsev, Vadim/0000-0002-2312-1169 Yakovleva, Irina/0000-0001-8918-3066 Mirzaev, Dzhalal/0000-0002-4696-8258
Number-of-Cited-References	14
Usage-Count-Since-2013	1
Journal-ISO	ISIJ Int.
Doc-Delivery-Number	RU445