Strain localization and deformation behavior in ferrite-pearlite steel unraveled by high-resolution in-situ testing integrated with crystal plasticity simulations

Isavand, Samaneh; Assempour, Ahmad

doi:10.1016/j.ijmecsci.2021.106441

Cited by 38 publications

(4 citation statements)

References 52 publications

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“…The green circular frames indicate that dislocations exist in both continuous and discrete pearlite. Studies have shown [ 37 ] that the smaller the spacing between cementites, the stronger the obstruction to dislocation slip. Dark-field image analysis indicates that there are a small number of round precipitates on the ferrite of the pearlite, with the size of the precipitates about 10–20 nm.…”

Section: Resultsmentioning

confidence: 99%

Influence of V on the Microstructure and Precipitation Behavior of High-Carbon Hardline Steel during Continuous Cooling

Zhang,

Gu,

Wang

et al. 2024

Materials

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High-carbon hardline steels are primarily used for the manufacture of tire beads for both automobiles and aircraft, and vanadium (V) microalloying is an important means of adjusting the microstructure of high-carbon hardline steels. Using scanning electron microscopy (SEM), X-ray diffraction (XRD), and transmission electron microscopy (TEM), the microstructure and precipitation phases of continuous cooled high-carbon steels were characterized, and the vanadium content, carbon diffusion coefficient, and critical precipitation temperature were calculated. The results showed that as the V content increased to 0.06 wt.%, the interlamellar spacing (ILS) of the pearlite in the experimental steel decreased to 0.110 μm, and the carbon diffusion coefficient in the experimental steel decreased to 0.98 × 10−3 cm2·s−1. The pearlite content in the experimental steel with 0.02 wt.% V reached its maximum at a cooling rate of 5 °C·s−1, and a small amount of bainite was observed in the experimental steel at a cooling rate of 10 °C·s−1. The precipitated phase was VC with a diameter of ~24.73 nm, and the misfit between ferrite and VC was 5.02%, forming a semi-coherent interface between the two. Atoms gradually adjust their positions to allow the growth of VC along the ferrite direction. As the V content increased to 0.06 wt.%, the precipitation-temperature-time curve (PTT) shifted to the left, and the critical nucleation temperature for homogeneous nucleation, grain boundary nucleation, and dislocation line nucleation increased from 570.6, 676.9, and 692.4 °C to 634.6, 748.5, and 755.5 °C, respectively.

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Section: Resultsmentioning

confidence: 99%

Influence of V on the Microstructure and Precipitation Behavior of High-Carbon Hardline Steel during Continuous Cooling

Zhang,

Gu,

Wang

et al. 2024

Materials

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“…Refs. [21][22][23][24][25][26][27][28][29][30][31][32][33][34] are only some of them. They span from continuum mechanical models assuming isotropic behaviour of the two constituents of pearlite and simple empirical relationships for the ferrite flow stress vs. its average lamellar spacing evolution to crystal plasticity models of ferrite coupled to FEM (CPFEM) accounting for the evolution of both the spatial orientation of the lamellae and the evolution of the crystallographic orientation of ferrite in each colony, incorporating dislocation density equations and interaction hardening laws for the ferrite slip systems.…”

Section: Introductionmentioning

confidence: 99%

A Microstructure-Based Constitutive Model for Eutectoid Steels

Rodríguez-Páez,

Dorronsoro,

Martinez-Esnaola

et al. 2023

Preprint

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“…These models pretend to account for the evolution of both the spatial orientation of the lamellae and the evolution of the crystallographic orientation of ferrite in each colony, incorporating dislocation density equations and interaction hardening laws for the ferrite slip systems. Some of these works are [79]- [83]. These models provide a detailed and insightful description of the pearlitic microstructure.…”

Section: Numerical Modelsmentioning

confidence: 99%

“…This approach allows the performance of simulations at scales intermediate between the macroscopic and microscopic levels. Therefore, although this model provides an improvement over those microstructural models that included an in-depth description of the microstructural features of pearlite (e.g., crystal plasticity FEM approaches such as those from Isavand and Assempour [79], Isavand et al [80], Huang et al [81] or Yasuda and Ohashi [82]), it is still not adapted for its application on industrial scale cold forming simulations. At this scale, the number of colonies involved is huge, requiring unfeasible mesh densities.…”

Section: Homogenization Strategymentioning

confidence: 99%

A microstructure-based constitutive model for pearlite.

Jorge

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Fully pearlitic eutectoid steels have an excellent compromise of mechanical strength and ductility and are widely used for rails, prestressing tendons and high-strength wires. These excellent mechanical properties are a consequence of their particular nanocomposite structure combining thin cementite lamellae (~12% volumen fraction) with ferritic lamellae. This complex substructure entails a complex microstructural and property evolution with applied strain that is difficult to model. In this work, a microstructure-based constitutive model for pearlite accounting for both the elastoplastic behaviour and the damage evolution is presented. The original formulation, valid for mesoscopic scales, considers the behaviour of ferrite and cementite separately, assuming that strengthening occurs through the mechanisms acting in ferrite. For its application in macro-scale systems such as wire drawing, a multi-colony homogenization strategy has been applied. For damage, a Continuum Damage Mechanics approach adapted to the features of pearlite has been adopted with the coupling of damage to the mechanical response. The model has been implemented for use in finite element simulations and has been calibrated using experimental data of tensile and torsion tests. Subsequently, the model has been validated, confirming its predictive capabilities across various aspects, including the mechanical response under different stress states, the build-up of internal stresses and the evolution of the microstructure with deformation.

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Strain localization and deformation behavior in ferrite-pearlite steel unraveled by high-resolution in-situ testing integrated with crystal plasticity simulations

Cited by 38 publications

References 52 publications

Influence of V on the Microstructure and Precipitation Behavior of High-Carbon Hardline Steel during Continuous Cooling

Influence of V on the Microstructure and Precipitation Behavior of High-Carbon Hardline Steel during Continuous Cooling

A Microstructure-Based Constitutive Model for Eutectoid Steels

A microstructure-based constitutive model for pearlite.

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