Crystallographic analysis of the martensitic transformation in medium-carbon steel with packet martensite / Gundyrev V. M.,Zel'dovich V. I.,Schastlivtsev V. M. // PHYSICS OF METALS AND METALLOGRAPHY. - 2016. - V. 117, l. 10. - P. 1017-1027.

ISSN/EISSN:

0031-918X / 1555-6190

Type:

Article

Abstract:

Based on X-ray diffraction studies of the martensite texture in a single martensite packet, exact orientation relationships between the orientations of martensite crystallites and the original austenite single crystal in medium-carbon steel 37KhN3A have been determined to be as follows: (011)(alpha)||(1; 0.990; 1.009)(gamma) to an accuracy of to an accuracy of +/- 0.15A degrees. It has been shown that the orientation relationships proved to be almost the same as in the Fe-31\% Ni alloy with a twinned martensite with close lattice parameters. Therefore, the conclusion has been drawn that the mechanism of the lattice deformation upon the martensitic transformation is the same in both alloys. It is described as follows. The lattice deformation occurs by shear on the (111) plane in the direction and is accompanied by an additional change in the dimensions in the mutually perpendicular directions . The invariantlattice deformation is implemented by slip in martensite on the planes of the (112)(alpha) type in the direction . One of the 24 crystallographically equivalent variants of the transformation mechanism has been considered. Apart from this type of deformation, an additional deformation of martensite is possible that does not change its orientation. It has been shown that the orientation of the martensite crystallite calculated via the phenomenological theory of the martensitic transformations (PTMT) differs by approximately 1A degrees from the experimentally determined orientation. This refers to both the lath and twinned martensite. In the twinned martensite, the invariant plane obtained in the PTMT calculations and the habit plane coincide. In lath martensite of 37KhN3A steel, the invariant plane of the martensite crystal obtained in PTMT calculations deviates by similar to 25A degrees from the orientation of the surface of the martensite plate (habit plane), which is close to the (111)(gamma) plane. An explanation of this phenomenon is given.

Author keywords:

martensitic transformation; medium-carbon steel; packet martensite; orientation relationships; crystallographic theory of martensitic transformations; lattice deformation; shape deformation; habit pla FERROUS LATH MARTENSITE; NI-5 PERCENT MN; MORPHOLOGY; MICROSCOPY

DOI:

10.1134/S0031918X16100100

Web of Science ID:

ISI:000386675900007

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	OCT
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
EISSN	1555-6190
Keywords-Plus	FERROUS LATH MARTENSITE; NI-5 PERCENT MN; MORPHOLOGY; MICROSCOPY
Research-Areas	Metallurgy \& Metallurgical Engineering
Web-of-Science-Categories	Metallurgy \& Metallurgical Engineering
Author-Email	gundyrev@imp.uran.ru zeldovich@imp.uran.ru
ResearcherID-Numbers	Zel'dovich, Vitaliy/J-7751-2013 Gundyrev, Vyacheslav/K-1158-2013 Schastlivtsev, Vadim/I-5825-2013
ORCID-Numbers	Zel'dovich, Vitaliy/0000-0002-4606-1306 Gundyrev, Vyacheslav/0000-0001-6114-4487 Schastlivtsev, Vadim/0000-0002-2312-1169
Funding-Acknowledgement	project of the Ural Branch, Russian Academy of Sciences {[}15-17-2-24]
Funding-Text	This work was performed according to the plan of the Russian Academy of Sciences, theme ``Struktura,{''} no. 01201463331. The texture was studied within the project of the Ural Branch, Russian Academy of Sciences, no. 15-17-2-24.
Number-of-Cited-References	20
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	5
Journal-ISO	Phys. Metals Metallogr.
Doc-Delivery-Number	EA5QF