Journal ArticleDOI
Effect of Continuous and Pulsed Current Gas Tungsten Arc Welding on Dissimilar Weldments Between Hastelloy C-276/AISI 321 Austenitic Stainless Steel
TLDR
In this paper, an attempt has been made to join Hastelloy C-276 nickel-based superalloy and AISI 321 austenitic stainless steel using ERNiCrMo-4 filler.Abstract:
In the present investigation, an attempt has been made to join Hastelloy C-276 nickel-based superalloy and AISI 321 austenitic stainless steel using ERNiCrMo-4 filler. The joints were fabricated by continuous and pulsed current gas tungsten arc welding processes. Experimental studies to ascertain the structure-property co-relationship with or without pulsed current mode were carried out using an optical microscope and scanning electron microscope. Further, the energy-dispersive spectroscope was used to evaluate the extent of microsegregation. The microstructure of fusion zone was obtained as finer cellular dendritic structure for pulsed current mode, whereas columnar structure was formed with small amount of cellular structure for continuous current mode. The scanning electron microscope examination witnessed the existence of migrated grain boundaries at the weld interfaces. Moreover, the presence of secondary phases such as P and μ was observed in continuous current weld joints, whereas they were absent in pulsed current weld joints, which needs to be further characterized. Moreover, pulsed current joints resulted in narrower weld bead, refined morphology, reduced elemental segregation and improved strength of the welded joints. The outcomes of the present investigation would help in obtaining good quality dissimilar joints for industrial applications and AISI 321 ASS being cheaper consequently led to cost-effective design also.read more
Citations
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Journal ArticleDOI
Ultrasonic vibration assisted laser welding of nickel-based alloy and Austenite stainless steel
TL;DR: In this article, ultrasonic vibration assisted laser welding (ULW) was used to solve the problems in laser welding of Hastelloy C-276 and austenite stainless steel 304 dissimilar materials.
Journal ArticleDOI
Comparing the effect of continuous and pulsed current in the GTAW process of AISI 316L stainless steel welded joint: microstructural evolution, phase equilibrium, mechanical properties and fracture mode
Taraneh Reza Tabrizi,Masoud Sabzi,S.H. Mousavi Anijdan,Ali Reza Eivani,Nokeun Park,Hamidreza Jafarian +5 more
TL;DR: In this paper, the effect of continuous and pulsed current in the gas tungsten arc welding (GTAW) on the various properties of an AISI 316L stainless steel joints was investigated.
Journal ArticleDOI
Process-microstructural features for tailoring fatigue strength of wire arc additive manufactured functionally graded material of SS904L and Hastelloy C-276
A. Rajesh Kannan,S. Mohan Kumar,N. Pravin Kumar,N. Siva Shanmugam,A. S. Vishnu,Yasam Palguna +5 more
TL;DR: In this paper, a wire arc additive manufacturing (WAAM) process-microstructural features correlation brings interests on the structural reliability of functionally graded materials (FGM), which limits the extensive use of this cutting edge technology.
Journal ArticleDOI
Investigations on metallurgical and mechanical properties of CO2 laser beam welded Alloy 825
TL;DR: In this article, an attempt is made to join nickel-based alloy 825 by employing CO2 laser beam welding, and a successful full penetration weld joint of a 5'mm thick plate is achieved with a very low heat input of 120'J-mm−1.
Journal ArticleDOI
The residual stress distribution of CO2 laser beam welded AISI 316 austenitic stainless steel and the effect of vibratory stress relief
TL;DR: In this article, a new approach of reliving stresses has been discussed using an electromagnetic exciter which is easy to apply and overcomes some of the limitations that other VSR procedures currently have.
References
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Journal ArticleDOI
Investigation on AISI 304 austenitic stainless steel to AISI 4140 low alloy steel dissimilar joints by gas tungsten arc, electron beam and friction welding
TL;DR: In this article, the microstructure and mechanical properties of AISI 304 stainless steel and low alloy steel joints by Gas Tungsten Arc Welding, Electron Beam Welding (EBW), and Friction Welding were investigated.
Journal ArticleDOI
Characterization of microstructures and mechanical properties of Inconel 617/310 stainless steel dissimilar welds
TL;DR: The microstructure and mechanical properties of Inconel 617/310 austenitic stainless steel dissimilar welds were investigated in this article, where three types of filler materials, including nickel-base fillers, were used to obtain dissimilar joint using the gas tungsten arc welding process.
Journal ArticleDOI
Microstructural features of dissimilar welds between 316LN austenitic stainless steel and alloy 800
TL;DR: In this article, the weld fusion zones and the interfaces with the base materials were characterised in detail using light and transmission electron microscopy, showing that the stainless steel weld metals solidified dendritically, while the 16-8-2 (16%Cr-8%Ni-2%Mo) weld metal showed a predominantly cellular substructure.
Journal ArticleDOI
The welding metallurgy of HASTELLOY alloys C-4, C-22, and C-276
TL;DR: In this article, the welding metallurgy of HASTELLOY* alloys C-4, C-22, and C-276 has been determined, and an equivalent chemistry model is proposed to account for the microstructures observed in each alloy's weld metal.
Journal ArticleDOI
Optimization of pulsed GTA welding process parameters for the welding of AISI 304L stainless steel sheets
P. K. Giridharan,N. Murugan +1 more
TL;DR: In this paper, the pulsed gas tungsten arc welding (pulsed GTAW) process parameters were optimized to obtain optimum weld bead geometry with full penetration in welding of stainless steel (304L) sheets of 3 mm thickness.
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