Effect of Strain Aging on the Rate Dependence of the Strain Resistance and the Cold Resistance of Low-Carbon Steels with Ferritic–Pearlitic and Bainitic Structures

Mishet’yan, A. R.; Fillipov, G. A.; Chevskaya, O. N.

doi:10.1134/s0036029521100232

Cited by 1 publication

(1 citation statement)

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“…Loporcaro et al [18] investigated the long-term effects of strain aging on low-carbon steel reinforcement. Mezo et al [19] investigated the static strain aging phenomenon in heavily drawn high-carbon steel wires, and their corresponding cords were undertaken within a temperature range of 80-200 • C. Mishet'yan et al [20] investigated the strain aging characteristics of low-alloy pipeline steels with different structural states (ferrite-pearlite, bainite), and an innovative approach was applied to assess the influence of strain rate during static loading on the yield strength of the steel in its initial condition and after strain aging.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Strain Aging at Different Temperatures on the Mechanical Properties of Cold-Drawn 10B21 Steel Combined with an Electron Microscope Study of the Structures

Dong,

Lu,

Wang

et al. 2024

Materials

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The effect of aging treatments at various temperatures on the mechanical properties and microstructure of 10B21 cold heading steel with a 20% reduction in area (ε = 0.1) was investigated. The mechanical properties were evaluated based on tensile tests and hardness tests, while the evolution of microstructure was observed by using an optical microscope (OM), scanning electron microscope (SEM), transmission electron microscope (TEM) and X-ray diffraction (XRD). The results reveal that aging treatment enhance the strength and hardness of 10B21 cold heading steel after drawing, and the highest values of strength and hardness are attained at an aging temperature of 300 °C. Specifically, the yield and ultrahigh tensile strength after aging at 300 °C are measured at 620 MPa and 685 MPa, respectively, which are 30 MPa and 50 MPa higher than the cold-drawn sample. Moreover, the hardness after aging at 300 °C reaches 293 HV, which has an increase of 30 HV compared to the cold-drawn state. The improvement in mechanical properties may be related to the strain-aging mechanism and the increased density of dislocations. In addition, the analysis of the TEM results reveal that the presence of the second-phase Ti(C,N) contributes to pinning the dislocations, whereas the dislocations are pinned between the cementite (Fe3C) lamellar and stacked at the grain boundaries, leading to strain hardening of the material.

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Section: Introductionmentioning

confidence: 99%