Experimental study to differentiate mechanical behaviours of TMCP and QT high strength steel at elevated temperatures

Xiong, Ming‐Xiang; Liew, J.Y. Richard

doi:10.1016/j.conbuildmat.2020.118105

Cited by 49 publications

(12 citation statements)

References 22 publications

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“…The properties in the fusion zone (FZ) are also a major concern. Because FZ is subjected to frequent heating and cooling, its microstructure is substantially martensitic, with hardness values of 1.5-2 times that of the base metal (BM) [17][18][19][20]. Due to the weld thermal cycles, the final welded joint consists of phase constituents with an appropriate mix of soft and hard phases.…”

Section: Welding Of Ahssmentioning

confidence: 99%

Advanced High-Strength Steels for Automotive Applications: Arc and Laser Welding Process, Properties, and Challenges

Perka

John

Kuruveri

et al. 2022

Metals

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In recent years, the demand for advanced high-strength steel (AHSS) has increased to improve the durability and service life of steel structures. The development of these steels involves innovative processing technologies and steel alloy design concepts. Joining these steels is predominantly conducted by following fusion welding techniques, such as gas metal arc welding, tungsten inert gas welding, and laser welding. These fusion welding techniques often lead to a loss of mechanical properties due to the weld thermal cycles in the heat-affected zone (HAZ) and the deposited filler wire chemistry. This review paper elucidates the current studies on the state-of-the-art of weldability on AHSS, with ultimate strength levels above 800 MPa. The effects of alloy designs on the HAZ softening, microstructure evolution, and the mechanical properties of the weld joints corresponding to different welding techniques and filler wire chemistry are discussed. More specifically, the fusion welding techniques used for the welding of AHSS were summarized. This review article gives an insight into the issues while selecting a particular fusion welding technique for the welding of AHSS.

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Section: Welding Of Ahssmentioning

confidence: 99%

Advanced High-Strength Steels for Automotive Applications: Arc and Laser Welding Process, Properties, and Challenges

Perka

John

Kuruveri

et al. 2022

Metals

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“…Zhang et al [17] demonstrated the mechanical properties of IN718 alloy manufactured by laser metal deposition at elevated temperature. Another studies of material properties of high strength aluminum alloys, cold-rolled steel, high-chromium austenitic stainless steel and high strength steel at elevated temperature are included in [18][19][20][21], respectively. Wang et al in [22] analyzed the buckling of restrained steel Q460 columns subjected to high temperature according to fire resistant standard ISO-834 and investigated the creep buckling of columns at elevated temperature in [23].…”

Section: Introductionmentioning

confidence: 99%

Heating and Compression at Elevated Temperature of Thin-Walled Titanium Channel Section Columns

2021

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The paper deals with numerical and experimental investigations of the channel section column subjected to heating and compression at elevated temperature. The analyzed columns were made of titanium alloy (Grade 2) and simply supported on both ends. The research procedure involved initial compression of the column (i), heating the preloaded column (ii) and compression of the column at elevated temperature to failure (iii). The tests were performed at temperatures from 23 °C to 300 °C. Numerical calculations were carried out in the Ansys® software and involved the application of bilinear and multilinear isotropic hardening. It has been revealed that the temperature increase in a statically indeterminate system causes a decrease in the load-carrying capacity of the profile. An increase in temperature by 27 °C causes a reduction of the load-carrying capacity by 10%, while compression at temperature 300 °C reduces the nominal load-carrying capacity of the profile by half. Most of the proposed numerical procedures allowed for accurate estimation of reaction forces during heating and maximum compressive forces recorded during compression at elevated temperatures. The correctness of the determined material characteristics and the suitability of shell models for estimation of the response of a thin-walled structure subjected to thermomechanical loading was confirmed.

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“…The reduction in the stiffness and strength of steel at elevated temperatures is well-documented and material testing of HSS at elevated temperatures has a number of precedents [19][20][21][22][23][24][25]. Based on such tensile testing, constitutive relationships for HSS at elevated temperatures have been proposed and validated for hot-rolled [19][20][21]26] and cold-formed [23] HSS sections.…”

Section: Introductionmentioning

confidence: 99%

Fire performance of connections between high‐strength steel tubular members

McCann

Wang

2021

ce papers

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An investigation is conducted into the behaviour of bolted endplate connections between high‐strength steel tubular members at elevated temperatures. Experiments are described where assemblies comprising Grade S460 steel square hollow sections connected via bolted endplates are heated to a target temperature between 150°C and 750°C using ceramic heating pads. The assembly, which is inclined at 45° to the horizontal, is then loaded vertically, thus generating combined bending and axial thrust in the members. The in‐plane vertical deflection, the applied load and temperatures at various points were measured. Results for the ultimate loads, equilibrium paths and the observed failure modes are discussed along with the influence of temperature on these features. A complementary nonlinear finite element analysis of the experimental assemblies is also described. Material models incorporating temperature‐dependent strengths, stiffnesses and strain hardening relationships available from the literature are employed, with temperature fields calibrated using steel temperatures recorded during the experiments applied to the models. It is shown that good agreement exists between the ultimate loads, equilibrium paths and failure modes predicted by the numerical models and those observed in the experiments, thus validating the modelling approach. It is found that, at lower temperatures, buckling of the endplate was the governing mode of failure. With increasing temperature, the mode of failure transitions to flexure in the beam and column stubs, thus suggesting that a relative degree of fixity is offered by the connections at the higher temperatures.

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Experimental study to differentiate mechanical behaviours of TMCP and QT high strength steel at elevated temperatures

Cited by 49 publications

References 22 publications

Advanced High-Strength Steels for Automotive Applications: Arc and Laser Welding Process, Properties, and Challenges

Advanced High-Strength Steels for Automotive Applications: Arc and Laser Welding Process, Properties, and Challenges

Heating and Compression at Elevated Temperature of Thin-Walled Titanium Channel Section Columns

Fire performance of connections between high‐strength steel tubular members

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