Understanding the effect of weld parameters on the microstructures and mechanical properties in dissimilar steel welds

Singh, Dilip Kumar; Sharma, Vikram; Basu, Ritwik; Eskandari, M.

doi:10.1016/j.promfg.2019.06.046

Cited by 12 publications

(9 citation statements)

References 10 publications

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“…The HI and cooling rates are inversely related. Increasing the HI decreases the cooling rate, causing the sample to tolerate a longer duration at high temperatures, resulting in grain development and boundary displacement [76,77]. Depending on the cooling rates, many ferritic microstructures are found while welding low-carbon steels [50].…”

Section: Effect Of Welding Process Parametersmentioning

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: Effect Of Welding Process Parametersmentioning

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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“…20,21 The welding heat input and the cooling rates are of critical importance to change the mechanical and microstructure properties. [22][23][24] In low carbon steels like XPF family steel, the difference in heat input and cooling rates leads to the ferritic microstructures. 2,25 The high heat inputs end up decreasing the cooling rate, thus causing grain coarsening.…”

Section: Introductionmentioning

confidence: 99%

“…2,25 The high heat inputs end up decreasing the cooling rate, thus causing grain coarsening. 24 In addition to the properties of the steels used in the automotive industry such as formability and strength, the welding ability is a crucial feature. Several automotive parts are obligated to be welded ahead of the forming operations.…”

Section: Introductionmentioning

confidence: 99%

Gas metal arc welding of XPF800 steel for automotive industry: Microstructural evaluation and mechanical properties investigation

Korkmaz

Meran

2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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In this study, the effect of gas metal arc welding on the mechanical and microstructure properties of hot-rolled XPF800 steel newly produced by TATA Steel has been investigated. This steel finds its role in the automotive industry as chassis and seating applications. The microstructure transformation during gas metal arc welding has been analyzed using scanning electron microscope, optical microscope, and energy dispersive X-ray spectrometry. Tensile, Charpy impact, and microhardness tests have been implemented to determine the mechanical properties of welded samples. Acceptable welded joints have been obtained using heat input in the range of 0.28–0.46 kJ/mm. It has been found that the base metal hardness of the welded sample is 320 HV0.1. On account of the heat-affected zone softening, the intercritical heat-affected zone hardness values have diminished ∼20% compared to base metal.

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“…However, due to the different complexity of materials, dissimilar welds may lead to unanticipated failures. The problems most commonly encountered in dissimilar weld joints are related to the formation of brittle phases and undesirable residual stress distributions across different zones of welds, which initiates formation of cracks or failures of the joint before the expected service life [ 1 , 2 ]. The majority of these negative consequences can be solved in principle by adjusting the microstructure while welding.…”

Section: Introductionmentioning

confidence: 99%

Comparative Research of Microstructure and Mechanical Properties of Stainless and Structural Steel Dissimilar Welds

et al. 2021

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The present study utilized a metal inert gas welding (MIG) to make a dissimilar weld of stainless steel AISI 304, 314, 316L, 420 grades and a standard structural steel S355MC. It refers to a weld joining two materials from different alloy systems commonly used in heat exchangers, pressure vessels, and power plant systems. Obviously, maintaining the integrity of such welds is of paramount importance to the safety issues. Therefore, detailed microscopic and experimental studies were performed to evaluate the reliability of these welds. The microscopic analysis did not reveal any presence of weld defects such as porosity or cracks, which ensured that MIG process parameters were properly selected. The performance of dissimilar welds was assessed by hardness and tensile tests. The hardness profiles revealed differences between austenitic and martensitic steel welds that later showed extremely high values in the heat-affected zone (HAZ), which caused fractures in this zone during tensile test. The welds of all austenitic steel grades withstood the tensile test, showing an average tensile strength of 472 MPa with fractures observed in the base metal zone. It made clear that the use of a filler rod 308LSI is suitable only for the austenitic stainless and structural steel dissimilar welds and not appropriate for martensitic-structural steel welds. The achieved results revealed that the higher hardness of the martensitic phase in the HAZ of AISI 420 is closely related with the formation of untempered coarse martensitic structure and higher carbon content.

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Understanding the effect of weld parameters on the microstructures and mechanical properties in dissimilar steel welds

Cited by 12 publications

References 10 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

Gas metal arc welding of XPF800 steel for automotive industry: Microstructural evaluation and mechanical properties investigation

Comparative Research of Microstructure and Mechanical Properties of Stainless and Structural Steel Dissimilar Welds

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