Mechanical properties of TMCP high strength steels with different strength grades at elevated temperatures

Xiong, Ming‐Xiang; Pi, Peng-Wei; Gong, Wei; Yang, Minfeng; Ou, Zheng-Feng

doi:10.1016/j.jobe.2021.103874

Cited by 4 publications

(5 citation statements)

References 16 publications

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“…Key parameters like the elastic modulus and effective yield strengths are given in Table 2. The elastic modulus is taken as the secant modulus between origin of the stress–strain curve and 40% of the strength at a total strain of 2.0% [23], whereas the effective yield strengths are taken as the stresses corresponding to an offset strain of 0.2% and total strains of 0.5%, 1.5%, and 2.0%, respectively. Table 2 shows that the average measurements by strain gauge and extensometer are similar, it is only violated by the average elastic modulus of the 12‐mm short specimens where the difference between strain gauge and extensometer is about 10.5% (this abnormal value is underscored in Table 2).…”

Section: Test Resultsmentioning

confidence: 99%

“…The laminar austenite is relatively stable so the mechanical properties are better; (2) the thinner plates are quenched fully underwater, therefore more martensite is formed, leading to a higher strength at room temperature. However, when the plates are tested under fire, their microstructure turns back to that of mild steel, which means they would have similar strengths under fire [23], in this regard, the thinner plates, having higher room temperature strength but similar high temperature strength to thicker plates, should have a smaller retention factor.…”

Section: Discussionmentioning

confidence: 99%

“…Key parameters like the elastic modulus and effective yield strengths are given in Table 2. The elastic modulus is taken as the secant modulus between origin of the stress-strain curve and 40% of the strength at a total strain of 2.0% [23], whereas the effective yield strengths are taken as the stresses corresponding to an offset strain of 0.2% and total strains of 0.5%, 1.5%, and 2.0%, respectively.…”

Section: At Room Temperaturementioning

confidence: 99%

See 2 more Smart Citations

Quenched‐and‐tempered high‐strength steels at elevated temperatures: Mechanical properties and effects of plate thickness

Xiong

Xiang²,

Yang

et al. 2023

Fire and Materials

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High‐strength steels can be used in civil structures that demand high strength/weight ratios, but their advantages may be weakened by fire. For this reason, this study has been concerned with the mechanical properties of a type of quenched‐and‐tempered high‐strength steel at elevated temperatures up to 800°C, the steel grade is S690. A standard axial tensile test was conducted on plate specimens with a reduced section. The test results demonstrated that the stress–strain curves of S690 steel at elevated temperatures had no distinctive yield plateau but post‐yield hardening, the effective yield strengths and elastic modulus deteriorated dramatically with the increasing temperature due to microstructure changes. Besides, this study also investigated the effects of steel plate thickness on said temperature‐dependent mechanical properties. The plate thicknesses are 8 and 12 mm nominally. The comparisons showed that, different from the trend at room temperature where the thinner steel plates usually have higher strength than their thicker counterparts, the thinner plates exhibited lower strengths at elevated temperatures, this implies that with the same cross‐sectional area, a steel member formed by thinner plates would have a lower cross‐sectional load‐carrying capacity under fire.

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Section: Test Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: At Room Temperaturementioning

confidence: 99%

See 1 more Smart Citation

Quenched‐and‐tempered high‐strength steels at elevated temperatures: Mechanical properties and effects of plate thickness

Xiong

Xiang²,

Yang

et al. 2023

Fire and Materials

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show abstract

“…The required temperature dependent elastoplastic material properties are taken from ref. [7]. The boundary conditions during welding are difficult to define as only a segment is modelled here in.…”

Section: Electron Beam Welding Simulation Of the Forked Shape Upper F...mentioning

confidence: 99%

“…The temperature dependent material properties of S460 are taken from ref. [7]. The boundary conditions as well as the applied external loading are shown in Fig.…”

Section: General Assumptions For the Mechanical Modelsmentioning

confidence: 99%

Numerical Fatigue Strength curve for the C1 Wedge Connection

Mohabeddine,

Malschaert,

Creusen

et al. 2023

ce papers

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This paper presents an investigation on the fatigue life prediction of the C1 Wedge Connection based on advanced finite element analysis. Recently developed, this connection links tubular sections of wind turbine towers using small horizontally placed bolts to slide two wedges, which pull the fork‐shaped upper flange and shaft‐shaped lower flange of the tower together. The fork‐shaped upper flange is manufactured using electron beam welding. A 3D finite element model is developed in ABAQUS software to simulate the behavior of the connection. A sequential thermal‐mechanical analysis is performed to simulate the electron beam welding process and estimate the residual stresses and distortions. The crack initiation at the lower flange, where the largest stress range is observed, governs the fatigue resistance of the connection. Fatigue crack initiation is assessed using the strain‐based local approach and code‐based methods such as the EN1993:1‐9 and DNV‐RP C2003. A comparison of the predictions from these methods is presented.

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Temperature Field Behavior on Plate Width at Thermomechanical Rolling of Low Carbon Microalloyed Steel at the Steckel Mill

Kukhar,

Kurpe,

Malii

2023

Lecture Notes in Mechanical Engineering

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Mechanical properties of TMCP high strength steels with different strength grades at elevated temperatures

Cited by 4 publications

References 16 publications

Quenched‐and‐tempered high‐strength steels at elevated temperatures: Mechanical properties and effects of plate thickness

Quenched‐and‐tempered high‐strength steels at elevated temperatures: Mechanical properties and effects of plate thickness

Numerical Fatigue Strength curve for the C1 Wedge Connection

Temperature Field Behavior on Plate Width at Thermomechanical Rolling of Low Carbon Microalloyed Steel at the Steckel Mill

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