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Effect of grain size distribution on recrystallisation kinetics in a Fe-30Ni model alloy
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Ji, Mo, Janik, Vit, Strangwood, Martin and Davis, Claire (2016) Effect of grain size distribution on recrystallisation kinetics in a Fe-30Ni model alloy. In: Proceedings of the 6th International Conference on Recrystallization and Grain Growth. Cham: Springer International Publishing, pp. 153-158. ISBN 9783319486260
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Official URL: http://dx.doi.org/10.1007/978-3-319-48770-0_22
Abstract
The high strength and toughness of microalloyed steels are derived by controlled rolling schedules, using recrystallisation to give grain refinement. A number of relationships (based on the JMAK equations) for the rate of recrystallisation, with a range of Avrami parameter values, have been reported. This paper discusses the role of grain size distribution on the recrystallisation rates and Avrami values for an austenitic model steel (Fe-30 Ni). Cold deformation has been used to provide uniform macroscopic strain distributions (strains of 0.2 and 0.3, which are equivalent to 0.27 and 0.45 strain if deformed at 850°C), followed by recrystallisation during annealing at 850 – 950°C. It is shown that the Avrami parameter is directly related to the grain size distribution, with a lower Avrami exponent being seen for a larger average and wider grain size distribution. In-situ heating in an SEM with EBSD has shown the recrystallisation kinetics to be affected by both nucleation site and local strain heterogeneity.
| Item Type: | Book Item | ||||||
|---|---|---|---|---|---|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||||
| Publisher: | Springer International Publishing | ||||||
| Place of Publication: | Cham | ||||||
| ISBN: | 9783319486260 | ||||||
| Book Title: | Proceedings of the 6th International Conference on Recrystallization and Grain Growth | ||||||
| Official Date: | 2016 | ||||||
| Dates: |
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| Page Range: | pp. 153-158 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Copyright Holders: | TMS (The Minerals, Metals & Materials Society) | ||||||
| Date of first compliant deposit: | 11 January 2017 |
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