On the origin of cementite diffraction peak broadening during tensile deformation at ambient temperatures

Weisser, M.A.; Petegem, S. Van; Cervellino, Antonio; Swygenhoven, H. Van

doi:10.1016/j.ijplas.2014.10.008

Cited by 14 publications

(6 citation statements)

References 26 publications

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“…11 shows the standard deviation of the elastic strain distributions of ferrite and cementite as a function of the applied stress calculated with the proposed model. The results show that the distribution of strains in cementite reaches a maximum deviation of 0.005 at an applied stress of 𝜎 ≈ 1200 MPa (𝜖 eq ≈ 0.11) which coincides approximately with the onset of plasticity in cementite; this corresponds to an additional peak broadening of 0.01 times the dspacing which is in line with the experimental broadening reported in literature [67,74,75].…”

Section: Distribution Of Elastic Strainssupporting

confidence: 89%

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A Microstructure-Based Constitutive Model for Eutectoid Steels

Rodríguez-Páez,

Dorronsoro,

Martinez-Esnaola

et al. 2023

Preprint

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Section: Distribution Of Elastic Strainssupporting

confidence: 89%

“…8). This broadening is compatible with the significant peak broadening observed in X-ray and neutron diffraction experiments on in-situ testing of patented pearlitic steels [67,68,[74][75][76][77]. Fig.…”

Section: Distribution Of Elastic Strainssupporting

confidence: 83%

A Microstructure-Based Constitutive Model for Eutectoid Steels

Rodríguez-Páez,

Dorronsoro,

Martinez-Esnaola

et al. 2023

Preprint

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“…The early broadening of cementite elastic strains distributions is compatible with the significant peak broadening observed in X-Ray and neutron diffraction experiments on in-situ testing of patented pearlitic steels [63], [64], [189]- [192]. Based on the maximum deviation of 0.005 of cementite distribution as calculated with the mesoscopic model, the equivalent additional peak broadening in a diffraction pattern would be 0.01 times the d-spacing, which is in line with the experimental observations found in literature [63], [189], [190].…”

Section: Distribution Of Elastic Strainssupporting

confidence: 90%

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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“…This is feasible thorough the use of neutron or synchrotron X-ray diffraction techniques. One of the methods that has been used predominantly is to study peak broadening resulting from strain or orientation heterogeneity within the grain(s) of the polycrystal [20][21][22][23][24][25]. In conventional powder diffraction techniques, an area detector is used to record the diffracted patterns.…”

Section: Introductionmentioning

confidence: 99%