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.L.; Ratia, Vilma; Shipway, P.H.; McCartney, D.G.; Stewart, David A.

doi:10.1016/j.matdes.2018.107548

Cited by 14 publications

(25 citation statements)

References 26 publications

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“…As discussed in a previous paper, these reflections can be interpreted as coming from three crystalographically distinguishable populations of MX phase (indexed as different shades of green markers in Fig. 1) [19]. Likewise, an additional two sets of reflections, crystallographically consistent with an intermetallic π-phase (π-ferrosilicide), are observed in the powder diffraction pattern [19].…”

Section: Phase Identification Using Xrdmentioning

confidence: 63%

“…This paucity of information significantly hinders the more widespread deployment of powder HIPed Tristelle 5183 components as hardfacings. In a previous paper the authors reported the microstructure formation in gas atomised Tristelle 5183 powder [19]. The aim of the present work was to characterise the microstructure formation and the phase evolution which takes place during powder HIPing using X-ray diffraction, scanning electron microscopy (including electron backscattered diffraction), and transmission electron microscopy.…”

Section: Introductionmentioning

confidence: 98%

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Microstructure formation in the powder HIPed hardfacing alloy Tristelle 5183 (Fe-21%Cr-10%Ni-7.5%Nb-5%Si-2%C in wt%)

Carrington

McCartney

Shipway

et al. 2022

Materials Characterization

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Section: Phase Identification Using Xrdmentioning

confidence: 63%

Section: Introductionmentioning

confidence: 98%

Microstructure formation in the powder HIPed hardfacing alloy Tristelle 5183 (Fe-21%Cr-10%Ni-7.5%Nb-5%Si-2%C in wt%)

Carrington

McCartney

Shipway

et al. 2022

Materials Characterization

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“…It should be noted that the microstructure of gas-atomised Stellite 6 powder has been analysed in cross-section by EBSD previously, and no outer band of finer microstructure was observed [24]. Other work on gas-atomised powder characterisation of gas-atomised metal powders also confirms that no outer shell of fine microstructure is present [25,26]. Therefore it can be said with some confidence that the outer band of dense material with fine microstructure seen in the irradiation spheroidised powder is as a direct result of pulsed electron irradiation remelting.…”

Section: Discussionmentioning

confidence: 79%

Spheroidisation of metal powder by pulsed electron beam irradiation

et al. 2019

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A new powder spheroidisation process has been demonstrated using a large-area, pulsed electron beam technique. This was used to dramatically improve the surface morphology of Stellite 6 metal powder. Powder surface asperities up to 20 µm size can be eliminated by melting and incorporation into the near-surface of the particle. Surface finish is significantly improved. Agitation and rotation of particles due to a beam-induced stress wave enables the irradiation of multiples sides of particles, resulting in uniformly smoothed particles after sufficient pulses. Elemental analysis revealed no measurable contamination as a result of the process. Transmission electron microscopy showed a dense layer is produced within a zone up to 3 µm beneath the surface, with a substantially reduced grain size from ca. 2 µm diameter in the bulk to ca. 40 nm. Elemental homogenisation also was accompanied by grain refinement. The irradiated Stellite 6 showed a reduced basic flowability energy (583 mJ compared to 627 mJ for the untreated), explained by reduced particle-particle cohesion and interlocking, and an increased conditioned bulk density of 4.57 g/ml compared to 4.33 g/ml due to satellite/asperity reduction.

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“…On the other hand, formation of these carbides reduces the carbon concentration in the matrix of the hardfacing alloy, which is favorable for improving the toughness. Some meaningful and interesting results have been reported in this area [14][15][16][17][18][19]. For example, Zhang et al [20] investigated the effect of Nb content on the microstructure of Fe-Cr-C coatings, and discovered that Nb can not only promote the formation of equiaxed grains, but also Coatings 2020, 10, 585 2 of 11 make the microstructure become finer.…”

Section: Introductionmentioning

confidence: 97%

Effect of Nb Content on the Microstructure and Wear Resistance of Fe-12Cr-xNb-4C Coatings Prepared by Plasma-Transferred Arc Welding

et al. 2020

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The Fe-Cr-C coatings with different levels of Nb addition were prepared on carbon steel by a plasma transferred arc (PTA) weld-surfacing process and their microstructure and properties were investigated. As the Nb content increases from 8.96% to 12.55%, the coating gradually changes from a hypereutectic structure (martensite, austenite matrix, primary NbC and eutectic γ+M7C3) to a near eutectic structure (γ+M7C3 and NbC) and finally a hypoeutectic structure (primary γ, γ+M7C3 and NbC). As the Nb content increases, the hardness and wear resistance of the coating first increase and then decrease, which is closely related to the NbC volume fraction first increasing and then the NbC size coarsening. The Fe-Cr-C coating with 11.65% Nb balances the NbC content and size, and has the highest hardness and best wear resistance. As the Nb content increases further, the formation and aggregation of coarse NbC carbides in the coating results in high brittleness of the coating, which may cause the carbide particles to peel off the coating during the wear process, thereby reducing wear resistance.

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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

Cited by 14 publications

References 26 publications

Microstructure formation in the powder HIPed hardfacing alloy Tristelle 5183 (Fe-21%Cr-10%Ni-7.5%Nb-5%Si-2%C in wt%)

Microstructure formation in the powder HIPed hardfacing alloy Tristelle 5183 (Fe-21%Cr-10%Ni-7.5%Nb-5%Si-2%C in wt%)

Spheroidisation of metal powder by pulsed electron beam irradiation

Effect of Nb Content on the Microstructure and Wear Resistance of Fe-12Cr-xNb-4C Coatings Prepared by Plasma-Transferred Arc Welding

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