Structure and stability of (Cr, Fe)7C3 ternary carbides in solid and liquid state

Sobolev, Andrey; Мирзоев, А. А.

doi:10.1016/j.jallcom.2019.06.282

Cited by 9 publications

(8 citation statements)

References 22 publications

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“…%. With the increase of Cr content, carbides tended to be stable, indicating that Cr 23 C 6 was more feasibly formed and stable [29]. primary carbides in high-carbon Cr-based alloys were (Cr, Fe)23C6 and (Cr, Fe)7C3 with hexagonal structure [28].…”

Section: Methodsmentioning

confidence: 98%

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Preparation and Characterization of In Situ Carbide Particle Reinforced Fe-Based Gradient Materials by Laser Melt Deposition

Zong

Zhang

et al. 2019

Coatings

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To obtain the wear-resistant camshaft with surface rigidity and core toughness and improve the service life of camshaft, wear-resistant Fe-based alloy gradient material was prepared by laser melt deposition. The traditional camshaft was forged by 12CrNi2V. In this paper, four types of wear-resistant Fe-based powders were designed by introducing various content of Cr3C2 and V-rich Fe-based alloy (FeV50) into stainless steel powder. The results showed that the gradient materials formed a satisfactory metallurgical bond. The composition of the phases was mainly composed of α-Fe, Cr23C6, and V2C phases. The increasing of Cr3C2 and FeV50 led to transform V2C into the V8C7. The microstructures were mainly cellular dendrite and intergranular structure. Due to the addition of Cr3C2 and FeV50, the average microhardness and wear resistance of gradient materials were significantly better than that of 12CrNi2V. The sample with 8% V had the highest microhardness of 853 ± 18 HV, which was 2.6 times higher than that of 12CrNi2V. The sample with 6% V had the best wear resistance, which was 21 times greater than that of 12CrNi2V.

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Section: Methodsmentioning

confidence: 98%

“…%. With the increase of Cr content, carbides tended to be stable, indicating that Cr23C6 was more feasibly formed and stable [29]. Figure 4 shows the cross section of the laser melting deposited Fe-based alloy gradient materials at low magnification.…”

Section: Methodsmentioning

confidence: 99%

Preparation and Characterization of In Situ Carbide Particle Reinforced Fe-Based Gradient Materials by Laser Melt Deposition

Zong

Zhang

et al. 2019

Coatings

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“…In recent years, special attention on the accelerated property mapping (XPM) technique that was used to perform a number of indents in short periods of time for the creation of contour maps of reduced modulus and hardness with high spatial resolution. [6][7][8][9] The insights on the determination of spatial properties and reports on local mechanical property assessments were given by Hintsala et al 6 and Magazzeni et al 8 The property evaluation of phases [10][11][12][13][14]16,17 was elucidated through microstructural characterization 13,[16][17][18][19][20][21] and insights on plasticity 10,15 along with strengthening mechanisms [22][23][24][25] was explored in a diverse manner. For instance, Kumar et al 11 investigated the deformation response of ferrite and martensite phases through nanoindentation experiments and described inhomogeneity in the hardness values of the ferrite phase.…”

Section: Introductionmentioning

confidence: 99%

“…19 Choo et al 16 analysed the homogeneously dispersed carbide phases and showed that they exist in various shapes along with the matrix phase. Stability calculations of carbide phases along with their structures, bonds between atoms and description of the phase relations in the Fe-Cr-C system were provided by Sobolev et al 17 and Kowalski et al 18 The cooling conditions affect the dilution of the hardfaced coating with the substrate material, thereby leading to the various microstructural features. 21 In general, the hardness parameter is considered the primary material property for defining wear resistance.…”

Section: Introductionmentioning

confidence: 99%

Effect of heat treatment on nano-mechanical behaviour of matrix and carbide phases of Fe–13Cr–1C hardfaced alloy coating

Kaushik

Krishna

Satya

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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Fe–Cr–C hardfaced coatings are applied over components used in mining, earth moving, ash and coal handling systems. The performance of these coatings depend on microstructural phases present in the deposit post-solidification and/or heat treatment. To prevent the failure of a coating, understanding the mechanical behaviour of the existing phases is one of the key areas of focus. In the current investigation, the study was limited to understand the influence of heat treatment process on nano-scale hardness and reduced modulus properties of phases of Fe–13%Cr–1%C hardfaced alloy coating by accelerated property mapping (XPM) technique. Colour variation in the property maps showed the relative deformation nature of the material. The hardness and reduced modulus values for carbide phases were found to be higher in all conditions. From Weibull statistical analysis, the Weibull modulus values reduced drastically for the carbide phase after heat treatment, revealing higher variability of mechanical properties. The above trends were observed mainly due to %C and %Cr difference across phases and carbide phase morphology transformation happened due to heat treatment.

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“…Carbides characterised by high specific density tend to settle to the bottom of the melt pool, whereas the particles of the hard phase with lower density concentrate in the upper zone, slightly below the cladding weld. Many research works are concerned with the thorough investigation of the structure and the abrasive wear resistance of deposited composite layers that have the nickel alloy-based matrix containing the addition of tungsten carbide [ 10 , 11 ], chromium carbide [ 12 , 13 ] and titanium carbide [ 4 , 14 , 15 ]. However, significantly fewer publications focus on composite claddings reinforced with particles of the remaining carbides of transition metals, e.g., ZrC, HfC, NbC, TaC and MoC, or synthetic metal–diamond sinters.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Abrasive Wear Resistance of Metal Matrix Composite Coatings Deposited on Steel Grade AISI 4715 by Powder Plasma Transferred Arc Welding Part 2. Mechanical and Structural Properties of a Nickel-Based Alloy Surface Layer Reinforced with Particles of Tungsten Carbide and Synthetic Metal–Diamond Composite

Czupryński

2021

Materials

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The article is the continuation of a cycle of works published in a Special Issue of MDPI entitled “Innovative Technologies and Materials for the Production of Mechanical, Thermal and Corrosion Wear-Resistant Surface Layers and Coatings” related to tests concerning the microstructure and mechanical properties of innovative surface layers made using the Powder Plasma Transferred Arc Welding (PPTAW) method and intended for work surfaces of drilling tools and machinery applied in the extraction industry. A layer subjected to tests was a metal matrix composite, made using powder based on a nickel alloy containing spherical fused tungsten carbide (SFTC) particles, which are fused tungsten carbide (FTC) particles and spherical particles of tungsten-coated synthetic metal–diamond composite (PD-W). The layer was deposited on the substrate of low-alloy structural steel grade AISI 4715. The results showed that the chemical composition of the metallic powder as well as the content of the hard phase constituting the matrix enabled the making of a powder filler material characterised by very good weldability and appropriate melting. It was also found that the structure of the Ni-WC-PD-W layer was complex and that proper claddings (characterised by the uniform distribution of tungsten carbide (WC)) were formed in relation to specific cladding process parameters. In addition, the structure of the composite layer revealed the partial thermal and structural decomposition of tungsten carbide, while the particles of the synthetic metal–diamond composite remained coherent. The deposited surface layer was characterised by favourable resistance to moderate dynamic impact loads with a potential energy of 200 J, yet at the same time, by over 12 times lower metal–mineral abrasive wear resistance than the previously tested surface layer made of cobalt-based composite powder, the matrix of which contained the hard phase composed of TiC particles and synthetic metal–diamond composite. The lower abrasive wear resistance could result from a different mechanism responsible for the hardening of the spherical particles of the hard phase susceptible to separation from the metal matrix, as well as from a different mechanism of tribological wear.

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Structure and stability of (Cr, Fe)7C3 ternary carbides in solid and liquid state

Cited by 9 publications

References 22 publications

Preparation and Characterization of In Situ Carbide Particle Reinforced Fe-Based Gradient Materials by Laser Melt Deposition

Preparation and Characterization of In Situ Carbide Particle Reinforced Fe-Based Gradient Materials by Laser Melt Deposition

Effect of heat treatment on nano-mechanical behaviour of matrix and carbide phases of Fe–13Cr–1C hardfaced alloy coating

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