Strain localization and delamination mechanism of cold-drawn pearlitic steel wires during torsion

Jamoneau, Aurélie; Solas, Denis; Bourgon, Julie; Morisot, P; Schmitt, Jean-Hubert

doi:10.1016/j.msea.2021.141222

Cited by 8 publications

(3 citation statements)

References 55 publications

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“…Similarities in the fracture surfaces at εd = 3 (nanolamellar composite) and εd = 6.52 (nanograined ferrite) suggest, that still the interfaces in the drawing direction largely control mechanical properties (Figure 2) [27]. They are source for delamination upon failure, irrespective whether the cementite is stoichiometric [35], becoming non-stochiometric [36,37] or already transforms to a carbon film along the interface [27]. However, the transfer of a lamellar architecture to a single-phase nanocrystalline alloy reduces ductility and toughness [27,38], albeit deformability remains notably high with respect to its exceptional strength.…”

Section: ) Reprinted By Permission Of the Publisher (Taylor And Francismentioning

confidence: 92%

“…are source for delamination upon failure, irrespective whether the cementite is stoichiometric [35], becoming non-stochiometric [36,37] or already transforms to a carbon film along the interface [27]. However, the transfer of a lamellar architecture to a single-phase nanocrystalline alloy reduces ductility and toughness [27,38], albeit deformability remains notably high with respect to its exceptional strength.…”

Section: Motivationmentioning

confidence: 99%

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SPD Deformation of Pearlitic, Bainitic and Martensitic Steels

et al. 2023

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The deformation behavior of nearly fully pearlitic, bainitic and martensitic steels during severe plastic deformation is summarized in this paper. Despite their significantly different yield stresses and their microstructures, their hardening behavior during SPD is similar. Due to the enormous hardening capacity the SPD deformation is limited by the strength of the tool materials. The microstructure at the obtainable limit of strain are quite similar, which is a nanocrystalline structure in the order of 10 nm, dependent on the obtainable strain. The nanograins are partially supersaturated with carbon and the grain boundaries are stabilized by carbon. Another characteristic feature is the anisotropy in grain shape which results in an anisotropy of strength, ductility and fracture toughness. The results are important for the development of ultra-strong materials and essential for this type of steels which are frequently used for application where the behavior under rolling contact and sliding contact is important.

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Section: ) Reprinted By Permission Of the Publisher (Taylor And Francismentioning

confidence: 92%

Section: Motivationmentioning

confidence: 99%

SPD Deformation of Pearlitic, Bainitic and Martensitic Steels

et al. 2023

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“…A ''deck of cards'' deformation mode (firstly proposed by Langford [5]) is favoured when pearlite colonies are solicited by stress states with a large shear stress component on a soft lamellar plane. The prevalence of the ''deck of cards'' deformation mode has been many times experimentally observed: e.g., in colonies with lamellar plane tilted near 45 • from the stress axis under tensile or compressive axial stresses, or in axially oriented colonies under torsion [48][49][50][51][52][53][54]. Therefore, we have adapted the orthotropic plastic yield criterion of Hill [55] to reproduce the ''deck of cards'' deformation mode in suitably oriented pearlitic elements by assigning adequate values to the parameters of the criterion inspired on the dependence of the CRSS for glide of dislocations on the effective interlamellar spacing, 𝑠 ef f , Eqs.…”

Section: Modelling Of Pearlitic Ferritementioning

confidence: 99%

A Microstructure-Based Constitutive Model for Eutectoid Steels

Rodríguez-Páez,

Dorronsoro,

Martinez-Esnaola

et al. 2023

Preprint

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The Substructure of Quenched High‐Carbon Pearlite in Fe–C Alloys

Zhang,

Zhou,

et al. 2024

steel research int.

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After a brief review of the history of pearlite structures in carbon steels, particularly on the pearlite formation mechanism, recent experimental investigations on the pearlite substructure are presented to express a distinct point of view. The water‐quenched high‐carbon pearlite substructure is investigated in detail by means of scanning electron microscopy and transmission electron microscopy. In the experimental observation results, it is shown that the cementite layer or ferrite layer in pearlite is composed of fine grains, which cannot be simply explained by traditional nucleation and grain growth mechanisms. However, the fine grain structure can be explained by the martensitic transformation products (twinned martensite with ultrafine grains of α–Fe and twinning boundaries ω–Fe (or ω–Fe3C)) and detwinning process. Upon tempering or detwinning, recrystallization of the ultrafine grains of both crystalline phases occurs to form the initial pearlite structure, while the grain size of both phases is still fine. The twinned martensite can be treated as the precursor of pearlite structure (pearlite nucleation stage), and the detwinning process can be regarded as the growth of the pearlite structure. Thus, the pearlite reaction can be described as follows: austenite → twinned martensite → pearlite.

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Strain localization and delamination mechanism of cold-drawn pearlitic steel wires during torsion

Cited by 8 publications

References 55 publications

SPD Deformation of Pearlitic, Bainitic and Martensitic Steels

SPD Deformation of Pearlitic, Bainitic and Martensitic Steels

A Microstructure-Based Constitutive Model for Eutectoid Steels

The Substructure of Quenched High‐Carbon Pearlite in Fe–C Alloys

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