Effects of Post-Weld Heat Treatment on the Microstructure and Toughness of Flash Butt Welded High-Strength Low-Alloy Steel

Shajan, Nikhil; Arora, Kanwer Singh; Asati, Brajesh; Sharma, Vikram; Shome, Mahadev

doi:10.1007/s11661-018-4499-1

Cited by 19 publications

(6 citation statements)

References 21 publications

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“…The deformation of 5CrNi-MoV steel at temperatures within the austenite phase field lead to the formation of cube component and changes into rotated cube component, which implies that they undergo recrystallization during the hot compression. It can be confirmed in other studies [37]. Besides, as was known that the cold-rolled texture components of the face-centered cubic alloy are mainly Copper {112} <111>, S{123} <634> and Brass{110} <112>, which formed the high angle grain boundary with the cubic oriented recrystallized grains.…”

Section: Austenite Texture Evolutionssupporting

confidence: 75%

Deformation Behavior and Evolution of Austenite Microstructure and Texture During Hot Compression of 5CrNiMoV Steel

Wang

Yang³

2020

Metallogr. Microstruct. Anal.

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Deformation behaviour of 5CrNiMoV steel was investigated at temperature 830-1230 °C and strain rate 0.001-10 s −1 . The flow curves were analyzed to illuminate the deformation characteristics. Comprehensive austenite microstructural investigation was carried out using optical microscope for deformed samples. It was found that discontinuous dynamic recrystallization mechanism played a leading part in the nucleation of dynamic recrystallization (DRX) nuclei and growth of DRX grains, and that the austenite grain size increased with deformation temperature, while a larger strain rate was conducive to grain refinement for the quickly generated strain storage-energy favorable for higher DRX nucleation rate. The parent austenite texture evolution and typical martensitic transformation texture for some deformed samples were characterized using electron backscattering diffraction technique and the software of the reconstruction of parent austenite. It was found that increasing temperature contributed to the increase of its maximum of random distribution (MRD) and the strength of rotated Cube texture component, which was probably for the behavior DRX and growth of DRX grains during the hot deformation. The rotated Cube was weakened with the strain rate rising, while the main texture component did not change significantly, which was due to the increase in number of active slip systems and grain fragmentation. Besides, the martensitic transformation texture was related to the parent texture for the variant selection.

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Section: Austenite Texture Evolutionssupporting

confidence: 75%

Deformation Behavior and Evolution of Austenite Microstructure and Texture During Hot Compression of 5CrNiMoV Steel

Wang

Yang³

2020

Metallogr. Microstruct. Anal.

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“…Subsequently a need has arisen to develop new high grade steels to fulfill this need (Sharma et al , 2017). High pressure pipe lines have put forth a challenge for manufactures and welders to overcome issues and challenges related to pipeline steels (Shajan et al , 2018). Pipe line steels are low carbon steels with optimum mix of strength and toughness, certified and classified by American Petroleum Institute (API) (Sharma et al , 2017).…”

Section: Introductionmentioning

confidence: 99%

The structural integrity of high-strength welded pipeline steels: a review

Singh

Shukla

Kumar

et al. 2020

IJSI

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PurposeThe key purpose of conducting this review is to identify the issues that affect the structural integrity of pipeline structures. Heat affected zone (HAZ) has been identified as the weak zone in pipeline welds which is prone to have immature failuresDesign/methodology/approachIn the present work, literature review is conducted on key issues related to the structural integrity of pipeline steel welds. Mechanical and microstructural transformations that take place during welding have been systematically reviewed in the present review paper.FindingsKey findings of the present review underline the role of brittle microstructure phases, and hard secondary particles present in the matrix are responsible for intergranular and intragranular cracks.Research limitations/implicationsThe research limitations of the present review are new material characterization techniques that are not available in developing countries.Practical implicationsThe practical limitations are new test methodologies and associated cost.Social implicationsThe fracture of pipelines significantly affects the surrounding ecology. The continuous spillage of oil pollutes the land and water of the surroundings.Originality/valueThe present review contains recent and past studies conducted on welded pipeline steel structures. The systematic analysis of studies conducted so far highlights various bottlenecks of the welding methods.

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“…In this case, studying the softening is very important. According to these softening mechanisms, strategies can be proposed to modify the mechanical performances of the FBW-ed products [17].…”

Section: Introductionmentioning

confidence: 99%

Physical Simulation and Numerical Simulation of Flash Butt Welding for Innovative Dual Phase Steel DP590: A Comparative Study

et al. 2023

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In this study, the microstructure and performance of newly designed dual-phase steel (DP590) after joining by flash butt welding (FBW) for vehicle wheel rims was analysed and compared by two simulations, i.e., physical simulation and numerical simulation, due to the high acceptance of these two methodologies. Physical simulation is regarded as a thermal–mechanical solution conducted by the Gleeble 3500 simulator and which can distribute the heat-affected zone (HAZ) of the obtained weld joint into four typical HAZs. These are coarse-grained HAZ, fine-grained HAZ, inter-critical HAZ and sub-critical HAZ. A combination of ferrite and tempered martensite leads to the softening behaviour at the sub-critical HAZ of DP590, which is verified to be the weakest area, and influences the final performance due to ~9% reduction of hardness and tensile strength. The numerical simulation, relying on finite element method (FEM) analysis, can distinguish the temperature distribution, which helps us to understand the relationship between the temperature distribution and real microstructure/performance. Based on this study, the combination of physical and numerical simulations can be used to optimise the flash butt welding parameters (flash and butt processes) from the points of temperature distribution (varied areas), microstructure and performance, which are guidelines for the investigation of flash butt welding for innovative materials.

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Effects of Post-Weld Heat Treatment on the Microstructure and Toughness of Flash Butt Welded High-Strength Low-Alloy Steel

Cited by 19 publications

References 21 publications

Deformation Behavior and Evolution of Austenite Microstructure and Texture During Hot Compression of 5CrNiMoV Steel

Deformation Behavior and Evolution of Austenite Microstructure and Texture During Hot Compression of 5CrNiMoV Steel

The structural integrity of high-strength welded pipeline steels: a review

Physical Simulation and Numerical Simulation of Flash Butt Welding for Innovative Dual Phase Steel DP590: A Comparative Study

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