Phase Transformation and Carbide Precipitation of Functional Gradient Semi-solid 9Cr18 Steel

Wang, Yongjin; Song, Ren‐Jie; Song, Renfeng

doi:10.1007/s40195-018-0723-7

Cited by 5 publications

(2 citation statements)

References 30 publications

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“…Comparable investigations with a semisolid treatment were also carried out by Omar [ 36 ] on M2 high‐speed steel, by Mohammed [ 37 ] on D2 cold‐work tool steel, and by Wang [ 38 ] on a 9Cr18 steel with the aim of dissolving all carbides and homogenizing the material in a short process time. The typical reported holding time during the partial melting was 5 min, identical to the own time–temperature program used in this work and visualized in Figure 10b.…”

Section: Experimental Investigationsmentioning

confidence: 99%

Primary Carbide Formation in Tool Steels: Potential of Selected Laboratory Methods and Potential of Partial Premelting for the Generation of Thermodynamic Data

Presoly

Gerstl

Bernhard

et al. 2022

steel research int.

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To predict the solidification and product properties of tool steels with complex chemical compositions, an understanding of the transformation behavior is crucial. Therefore, the quaternary Fe–C system with 10 wt% Cr and 3 wt% W (a subsystem of cold work steels, with M7C3 and M23C6 carbides) and the Fe–C system with 6 wt% W and 5 wt% Mo (simplified high‐speed steel, with M6C and MC carbides) are selected. The motivation for this study is to develop a methodology for the safe and fast production of model alloys and the close to equilibrium performance of differential scanning calorimetry (DSC) measurements. Regular diffusion annealing of as‐cast carbidic steels is time‐consuming, but with an additional heat treatment during the DSC measurement in the semisolid zone (30–50% liquid phase fraction), a status close to equilibrium can be achieved within minutes due to the high diffusion. To prove the potential of the equilibration by partial premelting in the DSC, additional equilibration and quenching experiments are performed in a Tammann furnace and investigated using a scanning electron microscope and X‐ray diffraction analysis. By combining these methods, carbide types and the transformation temperatures can be verified to evaluate and construct complete phase diagrams.

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Section: Experimental Investigationsmentioning

confidence: 99%

Primary Carbide Formation in Tool Steels: Potential of Selected Laboratory Methods and Potential of Partial Premelting for the Generation of Thermodynamic Data

Presoly

Gerstl

Bernhard

et al. 2022

steel research int.

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show abstract

“…Age-hardenable alloys gain their high strength through the formation of the second phases during phase transformation [1][2][3][4][5][6]. In many alloy systems, these second phases can often be coherent with the matrix when they are small in size [7][8][9][10].…”

mentioning

confidence: 99%

Three-Dimensional Growth of Coherent Ferrite in Austenite: A Molecular Dynamics Study

Sun

Dai

et al. 2019

Acta Metall. Sin. (Engl. Lett.)

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Coherent second phase often exhibits anisotropic morphology with specific orientations with respect to both the second and the matrix phases. As a key feature of microstructure, the morphology of the coherent particles is essential for understanding the second-phase strengthening effect in various industrial alloys. This letter reports anisotropic growth of coherent ferrite from austenite matrix in pure iron based on molecular dynamics simulation. We found that the ferrite grain tends to grow into an elongated plate-like shape, independent of its initial configuration. The final shape of the ferrite is closely related to the misfit between the two phases, with the longest direction and the broad facet of the plate being, respectively, consistent with the best matching direction and the best matching plane calculated via the Burgers vector content (BVC) method. The strain energy calculation in the framework of Eshelby's inclusion theory verifies that the simulated orientation of the coherent ferrite is energetically favorable. It is anticipated that the BVC method will be applicable in analysis of anisotropic growth and morphology of coherent second phase in other phase transformation systems.

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Prediction of Mechanical Properties of Sensitized Stainless Steel by Neural Network Modeling and Validation Using Ball Indentation Test

Das

Ghosh

2022

J. of Materi Eng and Perform

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Phase Transformation and Carbide Precipitation of Functional Gradient Semi-solid 9Cr18 Steel

Cited by 5 publications

References 30 publications

Primary Carbide Formation in Tool Steels: Potential of Selected Laboratory Methods and Potential of Partial Premelting for the Generation of Thermodynamic Data

Primary Carbide Formation in Tool Steels: Potential of Selected Laboratory Methods and Potential of Partial Premelting for the Generation of Thermodynamic Data

Three-Dimensional Growth of Coherent Ferrite in Austenite: A Molecular Dynamics Study

Prediction of Mechanical Properties of Sensitized Stainless Steel by Neural Network Modeling and Validation Using Ball Indentation Test

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