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.
JAIMIE DAURE Jaimie.Daure@nottingham.ac.uk
Professor PHILIP SHIPWAY email@example.com
Cripps Professor of Engineering Materials
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 μm are composed of dendritic fcc γ-Fe as the principal phase with smaller quantities of: α-Fe, an interdendritic silicide phase isostructural to Fe5Ni3Si2, and Nb(C,N). Particles 10 μm) 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 α-Fe, γ-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 α-Fe and silicide in smaller sized powder particles is consistent with increased undercooling prior to nucleation permitting metastable phase formation.
|Journal Article Type||Article|
|Publication Date||Feb 15, 2019|
|Journal||Materials & Design|
|Peer Reviewed||Peer Reviewed|
|APA6 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, https://doi.org/10.1016/j.matdes.2018.107548|
|Keywords||Mechanical Engineering; General Materials Science; Mechanics of Materials|
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