Nanocharacterisation of precipitates in austenite high manganese steels with advanced techniques: HRSTEM and DualEELS mapping

Bobynko, J., Craven, A. J., McGrouther, D. , MacLaren, I. and Paul, G. (2014) Nanocharacterisation of precipitates in austenite high manganese steels with advanced techniques: HRSTEM and DualEELS mapping. Journal of Physics: Conference Series, 522(1), 012031. (doi: 10.1088/1742-6596/522/1/012031)

Abstract

To achieve optimal mechanical properties in high manganese steels, the precipitation of nanoprecipitates of vanadium and niobium carbides is under investigation. It is shown that under controlled heat treatments between 850°C and 950°C following hot deformation, few-nanometre precipitates of either carbide can be produced in test steels with suitable contents of vanadium or niobium. The structure and chemistry of these precipitates are examined in detail with a spatial resolution down to better than 1 nm using a newly commissioned scanning transmission electron microscope. In particular, it is shown that the nucleation of vanadium carbide precipitates often occurs at pre-existing titanium carbide precipitates which formed from titanium impurities in the bulk steel. This work will also highlight the links between the nanocharacterisation and changes in the bulk properties on annealing.

• Item Type: Articles
• Additional Information: Electron Microscopy and Analysis Group Conference 2013 (EMAG2013) 3–6 Sep 2013, York, United Kingdom
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: McGrouther, Dr Damien and MacLaren, Dr Ian and Craven, Professor Alan
• Authors: Bobynko, J., Craven, A. J., McGrouther, D., MacLaren, I., and Paul, G.
• College/School: College of Science and Engineering > School of Physics and Astronomy > Kelvin Nanocharacterisation Centre
• Journal Name: Journal of Physics: Conference Series
• Publisher: IOP Publishing
• ISSN: 1742-6588
• ISSN (Online): 1742-6596
• Copyright Holders: Copyright © 2014 IOP Publishing Ltd
• First Published: First published in Journal of Physics: Conference Series 522(1):012031
• Publisher Policy: Reproduced under a Creative Commons License