Fundamental aspects of the martensite transformation curve in Fe-Ni-X and Fe-C alloys

Guimarães, J.R.C.; Rios, Paulo Rangel

doi:10.1016/j.jmrt.2018.04.007

Cited by 8 publications

(9 citation statements)

References 37 publications

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“…Tables 1 and 2 display the respective fitting parameters. The value of ϕ K = 0.96 obtained with the ultrafine-grained Mn-C steel data compares with the values obtained with the C-steels [22]. However, V MVi = 0.11 is higher than previously observed in ordinary steels.…”

Section: Athermal (Non-thermally Activated) Transformationssupporting

confidence: 71%

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General description of martensite transformation curves – a case for bainite

Guimarães

Rios

2019

Materials Science and Technology

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This work describes the results of validation trials of a formal model for the martensite transformation curve in steels. The model is based on microstructural evolution and accepted aspects of athermal, isothermal, mechanical-induced as well as magnetic-assisted martensite transformation modes. The model is operational for martensite and applicable to other intragrain transformations. The paper also explores the extension of the formalism to bainite.

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Section: Athermal (Non-thermally Activated) Transformationssupporting

confidence: 71%

“…Nevertheless, one cannot precisely predict the volume fraction of martensite in the material because the distribution of the clusters of transformed grains in the material is not unique. Thus, we equate V MV to the probability of finding at least one grain with a martensite volume fraction equal to P M [22,23]…”

Section: Introductionmentioning

confidence: 99%

General description of martensite transformation curves – a case for bainite

Guimarães

Rios

2019

Materials Science and Technology

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“…In previous work [5][6][7] , ξ was equal to temperature, magnetic field, mechanical deformation, and of course time. In this paper, one uses ξ = t. That is, this paper considers only isothermal kinetics.…”

Section: Theorymentioning

confidence: 99%

“…Nonetheless, in many transformations, one observes that there is an incubation time. The proposed alternative to Avrami's equation was introduced to describe martensitic transformations [5][6][7] . Subsequent work suggested that the equation could describe bainitic transformations 7 .…”

Section: Introductionmentioning

confidence: 99%

An Alternative to Avrami Equation

2019

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This paper proposes an alternative to the Avrami equation capable of describing whole transformation curves with significant fitting-correlations. The model bears physically meaningful parameters which permit considering the initial transformation kinetics independently from the subsequent microstructural evolution. Data of martensite, bainite, recrystallization, and pearlite transformations validate the model. Further to the expeditious description of transformation curves, the model guides the modeling of specific mechanisms.

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“…Martensite was first discovered in the 1890s by German metallurgist Adolf Martens in a hard mineral. In 1895, the French scholar Osmond named the microstructure formed from quenching steel "martensite" [1]. When steel is heated to the austenite temperature zone and then rapidly cooled, the quenched structure, namely, martensite, can harden and strengthen the steel.…”

Section: Introductionmentioning

confidence: 99%

Influence of material parameters on 2D-martensitic transformation based on the phase-field finite-element method

Gao

Zhang

et al. 2019

Metall. Res. Technol.

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Obtaining an accurate microscopic representation of the martensitic transformation process is key to realizing the best performance of materials and is of great significance in the field of material design. Due to the martensite phase transformation is rapidly, the current experimental is hard to capture all the information in the Martensite phase transformation process. Combining the phase-field method with the finite-element method, a model of martensitic transformation from a metastable state to a steady state is established. The law of a single martensite nucleus during martensitic transformation is accurately described. By changing the key materials that affect martensite transformation and the phase-field parameters, the effects of the parameters on the single martensitic nucleation process are obtained. This study provides an important theoretical basis for effectively revealing the essence of martensite transformation and can determine effective ways to influence martensite transformation, obtain the optimal parameters and improve the mechanical properties of such materials.

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Fundamental aspects of the martensite transformation curve in Fe-Ni-X and Fe-C alloys

Cited by 8 publications

References 37 publications

General description of martensite transformation curves – a case for bainite

General description of martensite transformation curves – a case for bainite

An Alternative to Avrami Equation

Influence of material parameters on 2D-martensitic transformation based on the phase-field finite-element method

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