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Microstructural characterisation of Tristelle 5183 (Fe-21%Cr-10%Ni-7.5%Nb-5%Si-2%C in wt%) alloy powder produced by gas atomisation

Carrington, M.J.; Daure, J.; Ratia, V.L.; Shipway, P.H.; McCartney, D.G.; Stewart, D.A.

Authors

M.J. Carrington

V.L. Ratia

D.G. McCartney

D.A. Stewart



Abstract

Nitrogen gas atomised powders of the hardfacing alloy Tristelle 5183 (Fe-21%Cr-10%Ni-7%Nb-5%Si-2%C in wt%) were sieved into different particle size ranges and their microstructures have been investigated. Powder particles larger than approximately 53??m are composed of dendritic fcc ?-Fe as the principal phase with smaller quantities of: ?-Fe, an interdendritic silicide phase isostructural to Fe5Ni3Si2, and Nb(C,N). Particles 10??m) sized Nb(C,N) particles, that are seen in all powder size fractions, pre-existed in the melt prior to atomisation, whereas micron-sized Nb(C,N) particles that are found within ?-Fe, ?-Fe or silicide are the primary solidification phase. Nanoscale Nb(C,N) also formed interdendritically in the last stages of solidification. Compared with a mould cast sample, a significant difference is the suppression of M7C3 formation in all powder size ranges. The increasing quantities of ?-Fe and silicide in smaller sized powder particles is consistent with increased undercooling prior to nucleation permitting metastable phase formation.

Citation

Carrington, M., Daure, J., Ratia, V., Shipway, P., McCartney, D., & Stewart, D. (2019). Microstructural characterisation of Tristelle 5183 (Fe-21%Cr-10%Ni-7.5%Nb-5%Si-2%C in wt%) alloy powder produced by gas atomisation. Materials and Design, 164, Article 107548. https://doi.org/10.1016/j.matdes.2018.107548

Journal Article Type Article
Acceptance Date Dec 12, 2018
Online Publication Date Dec 14, 2018
Publication Date Feb 15, 2019
Deposit Date Jan 14, 2019
Publicly Available Date Jan 14, 2019
Journal Materials and Design
Print ISSN 0264-1275
Electronic ISSN 1873-4197
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 164
Article Number 107548
DOI https://doi.org/10.1016/j.matdes.2018.107548
Keywords Mechanical Engineering; General Materials Science; Mechanics of Materials
Public URL https://nottingham-repository.worktribe.com/output/1467923
Publisher URL https://www.sciencedirect.com/science/article/pii/S0264127518309043

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