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The influence of segregation of Mn on the recrystallization behavior of C-Mn steels

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Slater, Carl, Mandal, Abhijit and Davis, Claire (2019) The influence of segregation of Mn on the recrystallization behavior of C-Mn steels. Metallurgical and Materials Transactions B, 50 . pp. 1627-1636. doi:10.1007/s11663-019-01603-2

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Official URL: https://doi.org/10.1007/s11663-019-01603-2

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Abstract

The influence of Mn segregation that occurs during casting on recrystallization kinetics has been explored for a C-Mn automotive steel. A homogenization heat treatment was used to remove Mn segregation, while maintaining a similar initial austenite grain size to the segregated condition, to provide base-line comparison data. Deformation trials were carried out in a Gleeble thermomechanical simulator to 0.3 strains at 900 °C, and significant differences in both recrystallization times and final grain sizes were seen between the two conditions. The segregated sample incurred a longer recrystallization time and a wider recrystallized grain size distribution than the homogenized sample. A finite element model was used to predict the local deformation strains based on variations in material properties caused by segregation; the model used data from XRF elemental mapping of Mn to define the local mechanical properties based on differences in solid solution strengthening. Local strain variations ranging from 0.19 to 0.49 were predicted in the segregated sample for an overall applied 0.3 strain (compared to 0.26 to 0.35 in the homogenized sample); using these strains to predict the recrystallized grain sizes gave a much better prediction for the grain size distribution.

Item Type: Journal Article
Subjects: T Technology > TS Manufactures
Divisions: Faculty of Science > WMG (Formerly the Warwick Manufacturing Group)
Library of Congress Subject Headings (LCSH): Carbon steel, Manganese steel
Journal or Publication Title: Metallurgical and Materials Transactions B
Publisher: Springer New York LLC
ISSN: 1073-5615
Official Date: 15 August 2019
Dates:
DateEvent
15 August 2019Published
15 May 2019Available
1 May 2019Accepted
Volume: 50
Page Range: pp. 1627-1636
DOI: 10.1007/s11663-019-01603-2
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
UNSPECIFIEDInnovate UKhttp://dx.doi.org/10.13039/501100006041
113061Jaguar Land Rover (Firm)http://viaf.org/viaf/305209406

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