Microstructure Evolution and Its Effects on the Mechanical Behavior of Cold Drawn Pearlite Steel Wires for Bridge Cables

Zhao, Fan; Mao, Xinping; Bao, Siqian; Zhao, Gang; Zhao, Sixin; Deng, Zhaoqun; He, Meng; Huang, Fangyu; Qu, Xi

doi:10.1007/s11595-022-2504-4

Cited by 6 publications

(2 citation statements)

References 28 publications

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“…As shown in Figure 2a,b, the metallographic results of the initial microstructure indicate that pure copper has equiaxed grains with a mean size of ~17 μm, and Q235 steel (mean grain size of ~14 μm) is composed of a homogeneous mixture of ~90% ferrite (white part in Figure 2b) and ~10% pearlite (black part in Figure 2b). It is well known that pearlite is a mechanical mixture of alternating lamellar ferrite and Fe3C [16,17]. According to the XRD results (Figure 2c), there is no other types of tissue in the matrix of both pure copper and Q235 steel.…”

Section: Resultsmentioning

confidence: 91%

Interfacial Microstructure and Shear Behavior of the Copper/Q235 Steel/Copper Block Fabricated by Explosive Welding

Zhao

et al. 2023

Coatings

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A copper/Q235 steel/copper composite block with excellent bonding interfaces was prepared by explosive welding which was a promising technique to fabricate laminates. The microstructure and mechanical properties of the interfaces were investigated via the tensile-shear test, optical microscope (OM), X-ray diffraction (XRD), scanning electron microscope (SEM), and electron back-scattered diffraction (EBSD). The results showed that the shear strength of the upper-interface and lower-interfaces of the welded copper/steel are higher than ~235 MPa and ~222 MPa, respectively. The specimens failed fully within the copper and not at the bonding interface. It was attributed to: (1) no cavities and cracks at the interface; (2) the interface formed a metallurgical bonding including numerous ultra-fine grains (UFGs) which can significantly improve the plastic deformation coordination at the interface and inhibit the generation of micro-cracks.

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Section: Resultsmentioning

confidence: 91%

Interfacial Microstructure and Shear Behavior of the Copper/Q235 Steel/Copper Block Fabricated by Explosive Welding

Zhao

et al. 2023

Coatings

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“…In the initial stage of spheroidization (fusion stage), carbide dissolution occurred through a dislocation resistance mechanism [ 14 ] : the enthalpy of bonding between carbon atoms in ferrite and dislocations was found to be higher than that between carbon atoms in carbides and alloy atoms, resulting in the concentration of mobile dislocations passing through carbide laminates and dragging carbon atoms into adjacent ferrite, leading to laminate decomposition. [ 15 ] Transformation mechanism of 0.95C–0.5Mn steel involved carbon diffusion from high‐energy sharp‐angle defects (small curvature radius) to low‐energy planes (large curvature radius) of cementite. [ 16 ] This resulted in the dissolution of cementite at sharp angles and an increase in curvature radius, while cementite on planes grew larger, decreasing the curvature radius and leading to spheroidization.…”

Section: Discussionmentioning

confidence: 99%

Acceleration of Spheroidization in Low‐Density Ultrafine Pearlitic Steel by κ‐Carbide

Chen,

Zhang,

Zhang

et al. 2024

steel research int.

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The impact of κ‐carbide on the spheroidization process of low‐density ultrafine pearlitic steel (with 5 wt% Al and 5 wt% Mn additions) is investigated through isothermal annealing spheroidization. In the findings, it is demonstrated that κ‐carbides can significantly refine the lamellar spacing of low‐density ultrafine pearlite during the isothermal transformation. Additionally, under identical conditions, κ‐pearlite exhibits a higher number of ferrite/κ‐carbide interfaces. In the first stage of pearlite spheroidization, an abundance of dislocations and sub‐grain boundaries facilitate rapid fusion of the lamellar pearlite, while in the second stage, they provide a high‐speed diffusion pathway for carbon diffusion. Moreover, the reduced lamellar spacing shortens the distance for carbon and alloying elements diffusion, thereby promoting granular κ‐carbide formation and accelerating spheroidization in low‐density ultra‐fine pearlite.

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Characteristic of Near-surface Microstructure and Its Effects on the Torsion Performance of Cold Drawn Pearlitic Steel Wires for Bridge Cables

Zhang

Mao

Bao

et al. 2022

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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Microstructure Evolution and Its Effects on the Mechanical Behavior of Cold Drawn Pearlite Steel Wires for Bridge Cables

Cited by 6 publications

References 28 publications

Interfacial Microstructure and Shear Behavior of the Copper/Q235 Steel/Copper Block Fabricated by Explosive Welding

Interfacial Microstructure and Shear Behavior of the Copper/Q235 Steel/Copper Block Fabricated by Explosive Welding

Acceleration of Spheroidization in Low‐Density Ultrafine Pearlitic Steel by κ‐Carbide

Characteristic of Near-surface Microstructure and Its Effects on the Torsion Performance of Cold Drawn Pearlitic Steel Wires for Bridge Cables

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