Influence of M23C6 dissolution on the kinetics of ferrite to austenite transformation in Fe-11Cr-0.06C stainless steel

Bettanini, Alvise Miotti; Ding, Lipeng; Mithieux, Jean‐Denis; Parrens, Coralie; Idrissi, Hosni; Schryvers, D.; Delannay, Laurent; Pardoen, Thomas; Jacques, Pascal

doi:10.1016/j.matdes.2018.12.005

Cited by 19 publications

(7 citation statements)

References 61 publications

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“…While M 23 C 6 (M = Fe, Cr) particles with an average size of 2 µm are preferentially clustered in bands along ferrite grain boundaries. The X-ray diffraction in Figure 9 confirms the presence of retained austenite and carbide Cr 23 C 6 have in the (FCC) and α-ferrite (BCC) [19]. On the X-ray diffractogram, δ-ferrite is not detected.…”

Section: Xrd Results Analysismentioning

confidence: 67%

Investigation of the Technological Possibility of Laser Hardening of Stainless Steel 14Cr17Ni2 to a Deep Depth of the Surface

Somonov

Tsibulskiy

Mendagaliev

et al. 2021

Metals

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The article presents the results of a research of the process of laser hardening of steel 14Cr17Ni2 (AISI 431) by radiation of a high-power fiber laser LS-16. Assessment of the theoretically possible maximum depth in laser processing without additional beam transformations, the use of additional coatings and devices were shown. The results of experiments on increasing the depth of the hardened layer during laser processing by using scanning of the laser beam and optimally selected mode parameters without scanning are demonstrated. The influence of the number of passes on the depth of the hardened layer is investigated. The microstructure of hardened samples was studied and quantitative estimation of structural components was carried out. The microhardness of hardened samples at different modes of laser hardening was measured.

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Section: Xrd Results Analysismentioning

confidence: 67%

Investigation of the Technological Possibility of Laser Hardening of Stainless Steel 14Cr17Ni2 to a Deep Depth of the Surface

Somonov

Tsibulskiy

Mendagaliev

et al. 2021

Metals

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“…[22] As the carbides dissolve, the Because this carbide is considered as stoichiometric, the chemical composition does not change significantly depending on the austenitizing time. [23] The main components are 67.70 wt pct Cr, 25.52 wt pct Fe and 5.58 wt pct C. In addition, there are small amounts of manganese (1.17 wt pct). Compared to the chemical composition determined by XRD (see Results and discussion, first section), these simulation results are in good agreement.…”

Section: E Simulation Of Phase Fraction and Chemical Compositionmentioning

confidence: 99%

Microstructural Changes During Short-Term Heat Treatment of Martensitic Stainless Steel—Simulation and Experimental Verification

Schmidtseifer

Weber

2021

Metall Mater Trans A

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Short-term heat treatments of steels are used for tools and cutlery but also for the surface treatment of a variety of other workpieces. If corrosion resistance is required, martensitic stainless steels like AISI 420L or AISI 420MoV are typically used. The influence of short-term heat treatment on the different metastable states of the AISI 420L steel was examined and reported in this article. Starting from a defined microstructural state, the influence of a short-term heat treatment is investigated experimentally with the help of a quenching dilatometer and computer assisted simulations are carried out. With the results obtained, a simulation model is built up which allows to compute the microstructural changes during a short-term heat treatment to be evaluated without the need for an experiment. As an indicator, the value of the martensite start temperature is calculated as a function of different holding times at austenitizing temperature. The martensite start temperature is measured by dilatometry and compared to calculated values. Validation of simulated results reveals the potential of optimizing steel heat treatment processes and provides a reliable approach to save time, resources and energy.

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“…The common austenitization process is a ferrite to austenite transformation accompanied by a dissolution of the M23C6 particles. Recently [14] the extent of interaction of Cr-rich carbides dissolution and the austenitic growth has been reassessed for Cr-containg steels (our case). It was found that small carbide paticle size promote faster austenite transformation leading to ferrite-free microstrucures at lower temperatures (because of kinetics effects).…”

Section: Alloy 15/25mentioning

confidence: 99%

Phase transformations in Fe–Cr–Mn alloys for magnetocaloric applications

Hai

Mayer²,

Tencé

et al. 2019

Journal of Solid State Chemistry

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The sequence of phase transformations in a Fe-Cr-Mn alloy (known as an austenitic stainless steel) are investigated in order to explore the potential of this rare earth-free material for magnetocaloric applications at high temperature. In the lack of high temperature X-ray diffraction the magnetic response and transition temperatures of alloys have been determined by using a Faraday's Balance apparatus and an extraction vector magnetometer. These characterizations have been complemented by DCS and DTA measurements as well as thermodynamic calculations using Thermocalc. The retained nominal composition is Fe0.59Cr0.16Mn0.25 (referred to as FeCrMn 15/25) shows the targeted reversible transformation. Carbon addition is shown to shift the transition temperature to lower values. The effect of carbon addition on the phase transition and on the magnetocaloric response is discussed. A comparison is made with the chromium-poor Fe-Cr-Ni system.

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Influence of M23C6 dissolution on the kinetics of ferrite to austenite transformation in Fe-11Cr-0.06C stainless steel

Cited by 19 publications

References 61 publications

Investigation of the Technological Possibility of Laser Hardening of Stainless Steel 14Cr17Ni2 to a Deep Depth of the Surface

Investigation of the Technological Possibility of Laser Hardening of Stainless Steel 14Cr17Ni2 to a Deep Depth of the Surface

Microstructural Changes During Short-Term Heat Treatment of Martensitic Stainless Steel—Simulation and Experimental Verification

Phase transformations in Fe–Cr–Mn alloys for magnetocaloric applications

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