Abstract
| Original language | English |
|---|---|
| Article number | 107548 |
| Journal | Materials and Design |
| Volume | 164 |
| DOIs | |
| Publication status | Published - 2019 |
| MoE publication type | A1 Journal article-refereed |
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Keywords
- Metals and alloys
- Coating materials
- Nuclear reactor materials
- Rapid-solidification
- Quenching
- Powder metallurgy
- Precipitation
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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. (Corresponding Author); Daure, J.; Ratia, V.L.; Shipway, P.H.; McCartney, D.G.; Stewart, D.A.
In: Materials and Design, Vol. 164, 107548, 2019.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - 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
AU - Carrington, M.J.
AU - Daure, J.
AU - Ratia, V.L.
AU - Shipway, P.H.
AU - McCartney, D.G.
AU - Stewart, D.A.
PY - 2019
Y1 - 2019
N2 - 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 <53 μm have increasing quantities of either dendritic α-Fe or cellular silicide phase with decreasing amounts of γ-Fe as the particle size decreases, along with ~5% Nb(C,N). Coarse (> 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.
AB - 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 <53 μm have increasing quantities of either dendritic α-Fe or cellular silicide phase with decreasing amounts of γ-Fe as the particle size decreases, along with ~5% Nb(C,N). Coarse (> 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.
KW - Metals and alloys
KW - Coating materials
KW - Nuclear reactor materials
KW - Rapid-solidification
KW - Quenching
KW - Powder metallurgy
KW - Precipitation
UR - http://www.scopus.com/inward/record.url?scp=85059134571&partnerID=8YFLogxK
U2 - 10.1016/j.matdes.2018.107548
DO - 10.1016/j.matdes.2018.107548
M3 - Article
VL - 164
JO - Materials and Design
JF - Materials and Design
SN - 0264-1275
M1 - 107548
ER -