Crystallography of in-situ transformations of the M ^sub 7^C^sub 3^ carbide in the cast Fe-Cr-Ni alloy

In the process of holding of the cast heat-resistant Fe-Cr-Ni (0.45C-25Cr-35Ni) alloy at 1150°C, the eutectic chromium carbide present in its structure undergoes a gradual transition M 7C3 [arrow right] M 23C6. The gradual formation of domains of the M 23C6 carbide inside the particles of the M 7C3...

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Bibliographic Details
Published in:Physics of metals and metallography 2017-03, Vol.118 (3), p.233
Main Authors: Kraposhin, V S, Kondrat'ev, S Yu, Talis, A L, Anastasiadi, G P
Format: Article
Language:English
Online Access:Get full text
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Summary:In the process of holding of the cast heat-resistant Fe-Cr-Ni (0.45C-25Cr-35Ni) alloy at 1150°C, the eutectic chromium carbide present in its structure undergoes a gradual transition M 7C3 [arrow right] M 23C6. The gradual formation of domains of the M 23C6 carbide inside the particles of the M 7C3 carbide makes it possible to assume that the observed phase transition is the well-known carbide transformation of the in situ type. The mechanism of the in situ transformation of the crystal structure of the carbide from M 7C3 into M 23C6 with a change in the number of nearest metal neighbors of carbon atoms is explained within the previously developed combinatory model of polymorphic transitions in the metals.
ISSN:0031-918X
1555-6190
DOI:10.1134/S0031918X17030097