In situ neutron diffraction under tensile deformation for patented pearlite steels

智也, 篠崎; 聡, 諸岡; 徹也, 鈴木; 友田陽,

doi:10.1299/jsmeibaraki.2004.89

Cited by 3 publications

(3 citation statements)

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“…8 shows calculated distribution of internal elastic strains at specific tensile strains (𝜖 = 0.01, 0.11, 1.43) for cementite and ferrite. Two main conclusions can be derived from these results: first, the average elastic strain in longitudinal direction in cementite is larger than in ferrite confirming the strain partitioning observed in X-ray and neutron diffraction experiments [67][68][69][70][71][72][73]; second, the distribution of elastic strains in cementite is, in general, very wide and it develops at relatively low strains. These two different aspects of the results are discussed more deeply below.…”

Section: Internal Stressessupporting

confidence: 76%

A Microstructure-Based Constitutive Model for Eutectoid Steels

Rodríguez-Páez,

Dorronsoro,

Martinez-Esnaola

et al. 2023

Preprint

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Section: Internal Stressessupporting

confidence: 76%

A Microstructure-Based Constitutive Model for Eutectoid Steels

Rodríguez-Páez,

Dorronsoro,

Martinez-Esnaola

et al. 2023

Preprint

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“…At the phase scale, it has been established that the microstructure parameters control the stress, strain and damage distribution in ferrite and cementite phases resulting from load transfer modes. Shinozaki et al [8] reported that the local stress in the constituent phase is increased with decreasing interlamellar spacing. This effect of microstructures controls the loading partitioning between ferrite and cementite phases which is characterized by a specific behavior under monotonic [2] and cyclic loading [9].…”

Section: Introductionmentioning

confidence: 99%

Effect of Interlamellar Spacing on the Monotonic Behavior of C70 Pearlitic Steel

Yahyaoui¹,

Sidhom²,

Braham

et al. 2014

AMR

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The effect of interlamellar spacing on monotonic behavior of C70 pearlitic steel was investigated. Tensile tests under X-ray diffraction coupled with self-consistent model have been used to identify the role of interlamellar spacing on the ferrite plasticity parameters and residual stresses. It has been established that yielding of pearlite is controlled by ferrite critical shear stresses ( (α ) which is higher for the smallest interlamellar spacing. Moreover, the residual stress level in ferrite is higher for the largest interlamellar spacing under the same imposed total strain. Lattice strains, measured by synchrotron X-ray diffraction, show elastic and plastic anisotropy of ferrite crystallites and high stresses in cementite which confirm the self consistent model calculation.

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“…In this work, they also observed the shifting and broadening of both ferrite and cementite peaks in the neutron diffraction profile. Shinozaki et al [68] also observed the delaying effect of smaller ILS on the onset of stress partitioning. In addition, they found that the absolute value of the phase stresses was increased with decreasing spacings (see Figure 3 In another work, Tomota et al [67] studied the evolution of elastic strains in ferrite by in situ neutron diffraction during tensile tests on heavily drawn pearlitic wires.…”

Section: Internal Stressesmentioning

confidence: 89%

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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In situ neutron diffraction under tensile deformation for patented pearlite steels

Cited by 3 publications

References 0 publications

A Microstructure-Based Constitutive Model for Eutectoid Steels

A Microstructure-Based Constitutive Model for Eutectoid Steels

Effect of Interlamellar Spacing on the Monotonic Behavior of C70 Pearlitic Steel

A microstructure-based constitutive model for pearlite.

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