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

M.J. Carrington (Corresponding Author), J. Daure, V.L. Ratia, P.H. Shipway, D.G. McCartney, D.A. Stewart

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

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 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.
Original languageEnglish
Article number107548
JournalMaterials and Design
Volume164
DOIs
Publication statusPublished - 2019
MoE publication typeA1 Journal article-refereed

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Atomization
Powders
Gases
Solidification
Undercooling
Metastable phases
Nucleation
Nitrogen
Particle size
Microstructure

Keywords

  • Metals and alloys
  • Coating materials
  • Nuclear reactor materials
  • Rapid-solidification
  • Quenching
  • Powder metallurgy
  • Precipitation

Cite this

@article{a559a66fa57d43e5b0c4f590c5497675,
title = "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",
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 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.",
keywords = "Metals and alloys, Coating materials, Nuclear reactor materials, Rapid-solidification, Quenching, Powder metallurgy, Precipitation",
author = "M.J. Carrington and J. Daure and V.L. Ratia and P.H. Shipway and D.G. McCartney and D.A. Stewart",
year = "2019",
doi = "10.1016/j.matdes.2018.107548",
language = "English",
volume = "164",
journal = "Materials and Design",
issn = "0264-1275",
publisher = "Elsevier",

}

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 journalArticleScientificpeer-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

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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

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