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In situ investigation of structure and stability of niobium carbonitrides in an austenitic heat-resistant steel

Zhang, X. F.; Terasaki, H. and Komizo, Y. (2012). In situ investigation of structure and stability of niobium carbonitrides in an austenitic heat-resistant steel. Scripta Materialia, 67(2) pp. 201–204.

DOI (Digital Object Identifier) Link: https://doi.org/10.1016/j.scriptamat.2012.04.019
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Abstract

The structure and stability of Nb(C,N) precipitates were direct observed during reheating of an austenitic heat-resistant steel using in situ hybrid observations. The coarsened δ-Nb(C,N) and finer ε-Nb(C,N) were present in as-received steel. During the coarsening process, the d-spacing of cubic δ-Nb(C,N) exhibits a sharp decrease with increasing temperature, while that of hexagonal ε-Nb(C,N) maintains a steady increase. Compared to δ-Nb(C,N), the ε-Nb(C,N) was quickly dissolved into the austenite during heating, and it would no longer reprecipitate in the subsequent cooling.

Item Type: Journal Item
Copyright Holders: 2012 Acta Materialia Inc.
ISSN: 1359-6462
Keywords: time-resolved X-ray diffraction; niobium carbonitrides; phase stability; dissolution; reprecipitation
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Engineering and Innovation
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 41909
Depositing User: Xinfang Zhang
Date Deposited: 11 Feb 2015 13:33
Last Modified: 04 Oct 2016 11:42
URI: http://oro.open.ac.uk/id/eprint/41909
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