Study of mechanism, microstructure and mechanical properties of activated flux TIG welded P91 Steel-P22 steel dissimilar metal joint

Kulkarni, Anup; Dwivedi, Dheerendra Kumar; Vasudevan, M.

doi:10.1016/j.msea.2018.06.054

Cited by 85 publications

(40 citation statements)

References 26 publications

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“…This happens mainly due to the formation of the weaker and stronger zone owing to the carbon migration in the transition zones. 1–3,25 From Figure 8, all the tensile specimens failed from the P22 base metal, which suggests that weld joint has better strength as compared to P22 base metal. It also reveals that the soft zone formed near the fusion line due to the carbon migration was not the weakest zone of the joint.…”

Section: Resultsmentioning

confidence: 95%

“…Different PWHTs were performed by the researchers, and there was a noticeable drop in the microhardness values. 1,3,8,9…”

Section: Resultsmentioning

confidence: 99%

“…Cr-Mo steels possess excellent weldability, which enables them to use in a variety of boiler applications. 3 Ferritic steels are popular and commonly used materials in the power generating industry, where components working at elevated temperature require better corrosion resistance properties, creep resistance, and low cost. 4 The issue concerning dissimilar metal welds between materials with different Cr contents basically exists in the form of carbon diffusion.…”

Section: Introductionmentioning

confidence: 99%

“…In these studies, authors performed experimentations to observe the effect of various fillers and the effect of PWHT on the performance of these joints. 1,3,6,9,23–25 Literature available on the development of suitable welding consumables to weld low alloy steels is significantly limited and not available in the public domain. Therefore, this investigation is an attempt to provide an alternative solution to the commercially available electrodes, which are used to fabricate the P22/P91 dissimilar joint.…”

Section: Introductionmentioning

confidence: 99%

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Experimental investigations on P22/P91 dissimilar shielded metal arc welds for power plant applications

Mahajan

Chhibber

2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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This article deals with the development of shielded metal arc welding electrodes for P22/P91 welds. A comparison has also been drawn with commercially available electrodes. P22 low alloy steel matching electrodes developed in the laboratory using a mixture design approach was employed to fabricate the dissimilar weld. Experimentations were performed to evaluate the microstructure and mechanical properties of microhardness, tensile strength, and impact energy of the welds. The impact strength was found to improve by 19% for a laboratory developed electrode made welds as compared to the commercial electrodes. The weld chemistry investigations indicate that the weld fabricated with laboratory-developed electrodes have a higher amount of chromium and molybdenum. These elements are known to enhance the corrosion resistance of joint, thereby imparting enhanced structural integrity in high temperature operating conditions. The electrodes designed and developed in this work are found to enhance the properties of P22/P91 joint much better as compared to that with the commercial electrodes.

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Section: Resultsmentioning

confidence: 95%

“…Different PWHTs were performed by the researchers, and there was a noticeable drop in the microhardness values. 1,3,8,9…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental investigations on P22/P91 dissimilar shielded metal arc welds for power plant applications

Mahajan

Chhibber

2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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“…Some mechanical tests for the characterization of the welding of dissimilar steels can be found in Reference [24]. In the present work, the mechanical characterization of the optimized joint has been carried out considering the objective of the present work to apply the welding of dissimilar steels to the home-appliance industry.…”

Section: Mechanical Analysis Of the Optimized Seammentioning

confidence: 99%

Minimization of the Thermal Impact in the Laser Welding of Dissimilar Stainless Steels

Cordovilla

Tur

Beltrán

et al. 2018

Metals

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Laser welding of dissimilar stainless steels is of interest when mechanical, corrosion, or esthetical requirements impose the use of a high-performance stainless steels, while production-cost requirements prevent using expensive materials in all the parts of a given device. The compromise may lead to the use of the most expensive material in critical areas and the cheapest one in the remaining. Their union can be materialized by laser-pulsed welding. It has intrinsic difficulties derived from the different physical and chemical properties of the steels, and from the need of preserving the protective passive layer. The present work achieves a welded joint with minimum thermal impact by means of laser pulses, capable of preserving the corrosion resistance of the involved stainless steels. The influence of the parameters to define static and dynamic pulses on the material and on the welding regime, keyhole, or heat conduction, is studied. It is used to calculate the overlapping factor of the pulses on the basis of the real dimensions of the melted area. A continuous joint has been built with dynamic pulses. The corrosion resistance of it has been checked showing a similar behavior to the non-heated material. The microstructure of the optimized joint is associated with a reduced HAZ while its mechanical behavior is suitable for its real application.

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Modified Lightweight U-Net with Attention Mechanism for Weld Defect Detection

Huang

Zhang

et al. 2022

Intelligent Computing Theories and Application

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Study of mechanism, microstructure and mechanical properties of activated flux TIG welded P91 Steel-P22 steel dissimilar metal joint

Cited by 85 publications

References 26 publications

Experimental investigations on P22/P91 dissimilar shielded metal arc welds for power plant applications

Experimental investigations on P22/P91 dissimilar shielded metal arc welds for power plant applications

Minimization of the Thermal Impact in the Laser Welding of Dissimilar Stainless Steels

Modified Lightweight U-Net with Attention Mechanism for Weld Defect Detection

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