A study of the deformation of patented steel wire

Langford, George

doi:10.1007/bf02811557

Cited by 147 publications

(72 citation statements)

References 2 publications

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“…This is the typical case of drawn pearlitic steels, for which an interlamellar spacing of only 20 nm is commonly achieved in mass production leading to a yield stress of up to 3 GPa or more [74][75][76].…”

Section: Heterophase Boundaries and Multiphase Alloys During Spdmentioning

confidence: 99%

Grain boundaries in ultrafine grained materials processed by severe plastic deformation and related phenomena

Sauvage

Wilde

Divinski

et al. 2012

Materials Science and Engineering: A

488

219

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Grain boundaries in ultrafine grained (UFG) materials processed by severe plastic deformation (SPD) are often called "non-equilibrium" grain boundaries. Such boundaries are characterized by excess grain boundary energy, presence of long range elastic stresses and enhanced free volumes. These features and related phenomena (diffusion, segregation, etc.) have been the object of intense studies and the obtained results provide convincing evidence of the importance of a non-equilibrium state of high angle grain boundaries for UFG materials with unusual properties. The aims of the present paper are first to give a short overview of this research field and then to consider tangled, yet unclear issues and outline the ways of oncoming studies. A special emphasis is given on the specific structure of grain boundaries in ultrafine grained materials processed by SPD, on grain boundary segregation, on interfacial mixing linked to heterophase boundaries and on grain boundary diffusion. The connection between these unique features and the mechanical properties or the thermal stability of the ultrafine grained alloys is also discussed.

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Section: Heterophase Boundaries and Multiphase Alloys During Spdmentioning

confidence: 99%

Grain boundaries in ultrafine grained materials processed by severe plastic deformation and related phenomena

Sauvage

Wilde

Divinski

et al. 2012

Materials Science and Engineering: A

488

219

View full text Add to dashboard Cite

show abstract

“…13) In plain pearlitic steel (i.e., hot rolled material), the yield strength follows a HallPetch type relationship 14,15) in relation to its pearlite interlamellar spacing, 2,8,9) where the HallPetch parameter is independent of the cooling rate and thus on the interlamellar spacing, but strongly increases with the increment of carbon content. 16) In the case of cold drawn pearlitic steel a HallPetch relationship cannot be fitted between the yield strength and the interlamellar spacing, 17) due to the fact that the decrease of interlamellar spacing is accompanied by a progressive microstructural orientation.…”

Section: )mentioning

confidence: 99%

“…Due to the described microstructural orientation, the use of the circular line method seems to be difficult. With regard to the perpendicular line method, a problem arises because the average interlamellar spacing does not necessarily have to match with the minimum, 22) matter which gets worse with cold drawn steel 2) due to the large strains undergone by the material.…”

Section: Microstructure Of Pearlitic Steelmentioning

confidence: 99%

Microstructure and Mechanical Properties in Progressively Drawn Pearlitic Steel

2014

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This paper studies the relationship between the microstructural changes caused by the cold drawing process in pearlitic steel wires (axial orientation of the pearlitic lamellae together with decrease of the average interlamellar spacing) and the improvement of their mechanical properties. The strength is related to plastic strain by means of the Embury-Fisher equation, and also by a new HallPetch expression, where to calculate the distance between barriers against dislocational movement one must consider, apart from the average interlamellar spacing, the average orientation angle. A modelling of the evolution of pearlitic lamellae with cold drawing was made, assuming that initially all angles appear with the same probability, that lamellae change their geometry along the longitudinal section of the wire similarly to the specimens and that the projection of the average interlamellar spacing on the cross section of the wire is proportional to the specimen diameter. The results obtained with this modelling show a good correspondence with experimental data.

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“…they must curl around each other to maintain compatibility. This gives Bee wires a wavy appearance in transverse sections [32][33][34]. This extra curling strain is thought to be a source of increased strain hardening after 70~ reduction.…”

Section: Contfnfsmentioning

confidence: 99%

Microstructure-mechanical property relationships of dual-phase steel wire

Nakagawa

Thomas

1985

Metall Trans A

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ABSTRACfThis thesis is concerned with the first (to the author's knowledge) attempts to utilize the properties of low carbon dualphase steels to produce high strength wire as an alternative to existing practice using pearlitic medium to high carbon steels.This goal to design a dual-phase steel suitable for drawing into high strength wire necessitated a study of the relationships between the microstructure and properties of undrawn rod and rod drawn into wire. and of the deformation of dual-phase steel at . ;. large strains.Dual-phase steel was selected for this study because of its pronounced strain hardening rate and superior formability. These properties permit dual-phase steel to be drawn to large strains and high strengths. The alloy composition and processing are ii generally quite simple and they can be varied to produce a wide range of structures and mechanical properties to fit specific applications.Dual-phase microstructures of several different martensite volume fractions, particle shapes, particle sizes, carbon contents and crystallographic relations with the ferrite matrix were studied. It was found that good mechanical properties could

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A study of the deformation of patented steel wire

Cited by 147 publications

References 2 publications

Grain boundaries in ultrafine grained materials processed by severe plastic deformation and related phenomena

Grain boundaries in ultrafine grained materials processed by severe plastic deformation and related phenomena

Microstructure and Mechanical Properties in Progressively Drawn Pearlitic Steel

Microstructure-mechanical property relationships of dual-phase steel wire

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