The clustering and coarsening of carbon multiplets during the aging of martensite from mössbauer spectroscopy: The preprecipitation stage of epsilon carbide

Génin, J.‐M. R.

doi:10.1007/bf02646651

Cited by 56 publications

(4 citation statements)

References 35 publications

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“…Experiments have shown that in such materials, carbon atoms tend to arrange with particular spacings at low temperature (see, e.g. [9,15,16]), providing evidence for many-body carbon interactions.…”

Section: Introductionmentioning

confidence: 99%

Carbon diffusion in supersaturated ferrite: a comparison of mean-field and atomistic predictions

Lawrence¹,

Sinclair²,

Perez³

2014

Modelling Simul. Mater. Sci. Eng.

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Hillert's mean-field elastic prediction of the diffusivity of carbon in ferrite is regularly used to explain the experimental observation of slow diffusion of carbon in supersaturated ferrite. With increasing carbon supersaturation, the appropriateness of assuming that many-body carbon interactions can be ignored needs to be re-examined. In this work, we have sought to evaluate the limits of such mean-field predictions for activation barrier prediction by comparing such models with molecular dynamics simulations. The results of this analysis show that even at extremely high levels of supersaturation (up to 8 at% C), mean-field elasticity models can be used with confidence when the effects of carbon concentration on the energy of carbon at octahedral and tetrahedral sites are considered. The reasons for this finding and its consequences are discussed.

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Section: Introductionmentioning

confidence: 99%

Carbon diffusion in supersaturated ferrite: a comparison of mean-field and atomistic predictions

Lawrence¹,

Sinclair²,

Perez³

2014

Modelling Simul. Mater. Sci. Eng.

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“…The attempt of a critical experiment was undertaken using the neutron diffraction [24], of which results supported the interpretation given in [17,23] and rejected the hypothesis in [16]. However, the both hypotheses were at variance with results of studies carried out using Mössbauer spectroscopy (see, e.g., [25][26][27]).…”

Section: Introductionmentioning

confidence: 84%

“…The virgin and aged Fe-C martensites were the object of a number of Mössbauer studies (see, e.g., [25][26][27][30][31][32][33][34][35][36][37][38]). So far, it is hardly possible to carry out ab initio calculations of hyperfine structure parameters in such multicomponent spectra.…”

Section: Interpretation Of Mössbauer Spectrummentioning

confidence: 99%

Carbon Distribution in Low-Temperature Isothermal Iron-Based Martensite and Its Tetragonality

Gavriljuk¹,

Фирстов²,

Sirosh³

et al. 2016

Metallofiz. Noveishie Tekhnol.

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“…In terms of microstructural transformation during lowtemperature tempering, in situ experiments show that ε-carbides are often precipitated in the carbon segregation areas between martensite laths, [17][18][19] so carbon segregation and the precipitation of ε-carbides are closely related. Since the atomic diffusion mechanism needs to be explored at the atomic scale, density functional theory (DFT) [20] is widely used to explain the mechanism of carbon segregation.…”

Section: Introductionmentioning

confidence: 99%

The Behavior of ε‐Carbides and Their Influence on Residual Stress

Yan,

Ding,

Liang

et al. 2024

steel research int.

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During low‐temperature tempering of wear‐resistant steel, ε‐carbide precipitation can effectively relax residual stress, and its microscopic mechanism is currently unclear. To reveal the stress relaxation mechanism during ε‐carbide precipitation, density functional theory calculations are combined with experiments to explore the ε‐carbide growth behavior and the stress evolution. The results show that ε‐carbide precipitation includes two stages: ε‐precursor formation and ε‐carbide nucleation, and ε‐carbide is in situ nucleated from ε‐precursor matrix. The precipitation‐induced stress relaxation behavior mainly occurs in the early stage of ε‐precursor formation and ε‐carbide nucleation. The early stage of ε‐precursor formation and ε‐carbide precipitation can relax the residual stress to 35.73% and 27.07%, respectively.

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The clustering and coarsening of carbon multiplets during the aging of martensite from mössbauer spectroscopy: The preprecipitation stage of epsilon carbide

Cited by 56 publications

References 35 publications

Carbon diffusion in supersaturated ferrite: a comparison of mean-field and atomistic predictions

Carbon diffusion in supersaturated ferrite: a comparison of mean-field and atomistic predictions

Carbon Distribution in Low-Temperature Isothermal Iron-Based Martensite and Its Tetragonality

The Behavior of ε‐Carbides and Their Influence on Residual Stress

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