Small-angle neutron scattering reveals the effect of Mo on interphase nano-precipitation in Ti-Mo micro-alloyed steels
File(s)
Accepted version
Author(s)
Type
Journal Article
Abstract
Ti-containing micro-alloyed steels are often alloyed with molybdenum (Mo) to reduce nano-precipitate coarsening, although the mechanism is still disputed. Using small angle neutron scattering we characterised the precipitate composition and coarsening of Ti-alloyed and Ti-Mo-alloyed steels. The results demonstrate ~25 at.% of Ti is substituted by Mo in the (Ti, Mo)C precipitates, increasing both the precipitate volume percent and average size. Mo alloying did not retard precipitation coarsening, but improved lattice misfit between precipitate and matrix, contributing to better ageing resistance of the Ti-Mo-alloyed steel. This new understanding opens opportunities for designing ageing-resistant micro-alloyed steels with lean alloying elements.
Date Issued
2020-01
Date Acceptance
2019-08-14
Citation
Scripta Materialia, 2020, 174, pp.24-28
ISSN
1359-6462
Publisher
Elsevier BV
Start Page
24
End Page
28
Journal / Book Title
Scripta Materialia
Volume
174
Copyright Statement
© 2019 Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence http://creativecommons.org/licenses/by-nc-nd/4.0/
Identifier
https://www.sciencedirect.com/science/article/pii/S1359646219304865?via%3Dihub
Subjects
Materials
0912 Materials Engineering
0913 Mechanical Engineering
0204 Condensed Matter Physics
Publication Status
Published
Date Publish Online
2019-08-27