Microstructure and mechanical properties of a Ni-based superalloy after heat treatment in a steady magnetic field

Li, Chuanjun; Yuan, Zhaojing; Yang, Fan; He, Shengya; Wang, Xuan; Li, Xi; Zhong, Yi; Ren, Zhongming

doi:10.1016/j.jmatprotec.2017.03.018

Cited by 14 publications

(5 citation statements)

References 30 publications

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“…Zhang et al [41] attributed this phenomenon to the influence of the magnetic order on diffusion or the obstructive effect of the magnetic domain walls, which reduced the mobility of grain boundaries and thus delayed recovery and recrystallization. In fact, the HMF has been demonstrated to significantly hinder diffusion [42][43][44], which is responsible for the reduction in the number of TS structures.…”

Section: Microstructure Evolutionmentioning

confidence: 99%

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Effect of High Magnetic Field in Combination with High-Temperature Tempering on Microstructures and Mechanical Properties of GCr15 Bearing Steel

Chen

Zhu

et al. 2022

Metals

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The microstructures and mechanical properties of GCr15 bearing steel after high-temperature tempering with and without a 5 T high magnetic field (HMF) were investigated. It was found that the application of the HMF at the stage of high-temperature tempering slowed down the growth of the tempered sorbite (TS) structures, increased the density of the carbides, and reduced the carbide size and the volume fraction. XRD diffraction patterns showed that the HMF resulted in a higher dislocation density. Hardness testing indicated that the HMF led to an increase in the Vickers hardness in the tempered sample. It is inferred that the change in carbide size stems from the reduction in nucleation barrier in the HMF and the increase in dislocation density originates from the interaction between dislocations and carbides. Additionally, the decrease in diffusivity in the HMF also contributes to the reduction in the size of TS structures and the refinement of carbides. This work demonstrates that high-temperature tempering with an HMF can slow down the growth of TS microstructures in GCr15 bearing steel, control the carbide size, and improve Vickers hardness, which provides a new heat treatment method to regulate the microstructure and properties of GCr15 bearing steel.

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Section: Microstructure Evolutionmentioning

confidence: 99%

“…Many studies showed that the interaction between dislocations and carbides originates from the stress field induced by the precipitates [43,53,54]. Dislocation bending between pinning points is crucial for dislocation-precipitation interactions in steel and iron materials [55].…”

Section: Dislocation Densitymentioning

confidence: 99%

Effect of High Magnetic Field in Combination with High-Temperature Tempering on Microstructures and Mechanical Properties of GCr15 Bearing Steel

Chen

Zhu

et al. 2022

Metals

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“…Qiu et al stated that in a hot isostatical pressed nickel-based alloy, solution treatment below the solvus of γ phase leads to the formation of finer secondary γ phase with a cuboidal shape as well as a medium-size tertiary with a spherical shape [19]. Qiu et al found that during aging heat treatment of the DZ483 nickel-based superalloy, most of the γ phases exhibit a typical cuboidal shape in the dendrite core, whereas some of the γ phases show a butter-fly shape in the interdendritic zone [26]. Figure 10 shows TEM micrographs of the as-cast Ni-Nb5 alloy undergoing a compressive deformation degree by 60% at room temperature.…”

Section: Plastic Deformation Mechanism Of As-cast and Heat-treated Nimentioning

confidence: 99%

“…Souza et al found that γ phase precipitation due to aging results in an additional increase in mechanical strength and hardness of nickel-based superalloys [25]. Li et al stated that the smaller size of γ phases, which precipitated after heat treatment, is beneficial for enhancing the Vickers hardness as well as the tensile strength of the DZ483 Ni-based superalloy [26]. γ phase is also the major strengthening phase of nickel-based superalloys, but it is so thermodynamically metastable that it is easy to be transformed into the more thermodynamically stable δ phase [27].…”

Section: Introductionmentioning

confidence: 99%

Influence of Heat Treatment on Microstructures and Mechanical Properties of NiCuCrMoTiAlNb Nickel-Based Alloy

Jiang

Sun

Zhang

et al. 2018

Metals

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Abstract:As-cast NiCuCrMoTiAlNb nickel-based alloys were subjected to two-stage heat treatment, including solution treatment and subsequent aging treatment. Furthermore, the influence of heat treatment on microstructures and mechanical properties of NiCuCrMoTiAlNb nickel-based alloys was further investigated. The as-cast NiCuCrMoTiAlNb Ni-based alloys are able to experience large plastic deformation at room temperature, where nanocrystalline phases are induced. In the case of heat-treated NiCuCrMoTiAlNb nickel-based alloys, with increasing Nb content, plenty of Ni 3 (Al, Ti) precipitates (γ phases) are distributed in the γ matrix and they are able to become the obstacles to impede the movement of dislocations, which is responsible for increasing the yield strength of NiCuCrMoTiAlNb nickel-based alloys. Pile-up of dislocations in the vicinity of γ precipitates adversely influences plasticity of NiCuCrMoTiAlNb nickel-based alloys.

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“…The analysis of scientific literature has revealed that, for the realization of heat treatment reserves and for the improvement of the properties of various articles, a number of authors have carried out basic research on the possibility of controlling the properties of steels by specific structure organization by external influence of the energy of a constant magnetic field (MF) during phase transformations in heat treatment [7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Physical Aspects of Laser Steel Processing in the Magnetic Field

Brover

Topolskaya

2022

MSF

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The article contains the results of experiments carried out on laser irradiation of steels in a constant magnetic field. The experiment shows it possible to increase the cooling speed while heat transfer decreases from the surface into lower metal layers, which slightly reduces laser-hardened layer depth, increases convective mixing of the fusion area, which have a positive impact on the surface layers quality of steel and alloys. This has a positive effect on strength product properties. Magnetic field processing of metal reduces the degree of local plastic deformation of irradiated layer due to magnetostriction phenomenon. Magnetic field superimposition contributes to two-phase decay of the martensite, and reduces residual stresses and crack risk.

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Microstructure and mechanical properties of a Ni-based superalloy after heat treatment in a steady magnetic field

Cited by 14 publications

References 30 publications

Effect of High Magnetic Field in Combination with High-Temperature Tempering on Microstructures and Mechanical Properties of GCr15 Bearing Steel

Effect of High Magnetic Field in Combination with High-Temperature Tempering on Microstructures and Mechanical Properties of GCr15 Bearing Steel

Influence of Heat Treatment on Microstructures and Mechanical Properties of NiCuCrMoTiAlNb Nickel-Based Alloy

Physical Aspects of Laser Steel Processing in the Magnetic Field

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