Nanostructure and mechanical properties of heavily cold-drawn steel wires

Yang, Yosheph; Bae, Jong Gu; Park, C.G.

doi:10.1016/j.msea.2008.12.036

Cited by 36 publications

(20 citation statements)

References 15 publications

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“…The drawing of pearlite results in the refinement of lamellae spacing as well as progressive alignment of cementite lamellae along the drawing direction. [ 20,35,36 ] A decrease in lamellae spacing resulting from wire drawing was able to enhance the shear stress and shear strain at failure (up to drawing strain of 0.68). [ 20 ] This increase is attributed to the alignment of pearlite colony along the wire axis.…”

Section: Discussionmentioning

confidence: 99%

Deformation and Microstructural Evolution of Nanostructured Pearlite under Tension versus Torsion

Khiratkar

Mishra

Singh

2020

steel research int.

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In the current work, nanostructured pearlitic steels in bulk with interlamellar spacing of 86 and 168 nm, respectively, are developed through suitable alloying combined with appropriate heat treatment. The specimens extracted from the steels are tested separately in tension and torsion. Under tensile extension, finer pearlite shows a higher yield strength and ultimate tensile strength but fractures at a lower value of strain. However, under torsion testing, finer pearlite deforms to higher shear stress while fracturing at marginally larger shear strain than the coarser pearlite. Under torsion loading, the fractured surface of the finer pearlite presents a larger length of ductile crack propagation (DCP) extending from the circumference toward the center before initiation of cleavage fracture. Scanning electron microscopy (SEM) images of the DCP region are used to characterize the deformation of cementite lamellae, whereas electron backscattered diffraction (EBSD) maps reveal the misorientation changes in ferrite due to torsion. A more frequent and irregular change in ferrite misorientation for coarser pearlite in the DCP region is observed compared with finer pearlite. Bending and fragmentation of cementite lamellae are observed to be higher for fine pearlite, suggesting better strain accommodation. Thus, decreasing the lamellar spacing in nanostructured pearlite improves the torsional response.

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Section: Discussionmentioning

confidence: 99%

Deformation and Microstructural Evolution of Nanostructured Pearlite under Tension versus Torsion

Khiratkar

Mishra

Singh

2020

steel research int.

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“…At higher values of squeeze as a result of strong increase in nucleation rate, with relatively small increase in the rate of growth, the size of grain is decreasing [6].…”

Section: Introductionmentioning

confidence: 96%

Optimization of the Inter-Operation Annealing of Cold-Drawn Eutectoid Steels

et al. 2016

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The test of the results presented in this paper has demonstrated that the most suitable recrystallizing annealing temperature for cold drawn eutectoid steels is 700• C. The microscopic examinations, with the use of scanning electron microscopy and transmission electron microscopy and the results of mechanical properties tests have shown that only at this temperature it is possible to obtain the fully recrystallized homogeneous fine-grained structure of the pearlitic steel.

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“…Elachachi et al (2006) attempted to develop a probabilistic multi-scale time-dependent model and studied cable behaviour to distinguish the wire, strand, and cable scales, with a complete decoupling among these scales. Toribio and Ovejero (1997), Pennington, Van Raemdonck, Matlock, and Krauss (2011) and Yang, Bae, and Park (2009) investigated the most important factors affecting the mechanical properties and fracture response of steel wires. Numerous other studies have been directed to corrosion, fatigue and a coupled corrosion and fatigue of steel wires (Krishnan & Kumar, 2004;Li, Lan, Ju, & Li, 2011;Mayrbaurl, 2000;Moser, Singh, Kahn, & Kurtis, 2011;Mozos & Aparicio, 2011;Rusk & Hoppe, 2009;.…”

Section: Introductionmentioning

confidence: 99%

Probabilistic deterioration model of high-strength steel wires and its application to bridge cables

Zhu

et al. 2014

Structure and Infrastructure Engineering

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Bridge inspections reveal that severe corrosion and fatigue are the main failure mechanisms of bridge stay cables. This paper presents an empirical modelling of the long-term deterioration process of steel wires in cables with consideration of the simultaneous occurrence of uniform corrosion, pitting corrosion and fatigue induced by a combined action of environmental aggression and cyclic loading. Accelerated corrosion experiments are conducted to determine the different corrosion levels of high-strength steel wires, and time-dependent statistical models are developed to quantify uniform and pitting corrosion depth. Corrosion-fatigue process of steel wires is subsequently simulated using the corrosion models and cyclic stress obtained through cable force monitoring data. The mechanical properties of corroded steel wires, including yield stress, ultimate stress, ultimate strain and modulus of elasticity, are experimentally characterised, and the statistical models are established through regression analysis. Finally, the deterioration models of high-strength steel wires (including crack depth, ratio of broken wires, and remaining strength, among others) is extended to probabilistically assess the time-variant conditions of bridge cables (sectional area loss and remaining capacity). The presented study on the long-term deterioration of bridge cables would provide guidance to future decision-making regarding the maintenance and replacement of bridge cables.

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Nanostructure and mechanical properties of heavily cold-drawn steel wires

Cited by 36 publications

References 15 publications

Deformation and Microstructural Evolution of Nanostructured Pearlite under Tension versus Torsion

Deformation and Microstructural Evolution of Nanostructured Pearlite under Tension versus Torsion

Optimization of the Inter-Operation Annealing of Cold-Drawn Eutectoid Steels

Probabilistic deterioration model of high-strength steel wires and its application to bridge cables

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