Journal ArticleDOI
Continuous drive friction welding of Inconel 718 and EN24 dissimilar metal combination
TLDR
In this article, the observed trends in mechanical properties are explained on the basis of observed microstructure, fracture behaviour, electron probe microanalysis and X-ray diffraction. And they showed that post-weld heat treatment applicable to either Inconel 718 or EN24 led to reduction in toughness and increase in strength.Abstract:
Nickel based superalloy Inconel 718 and low alloy steel EN24 are welded by continuous drive friction welding in annealed condition and then post-weld heat treated (PWHT). The welds exhibit low strength and high toughness in the as welded condition. Post-weld heat treatment applicable to either Inconel 718 or EN24, led to reduction in toughness and increase in strength. Toughness degradation after PWHT as per Inconel 718 was predominant. The observed trends in mechanical properties are explained on the basis of observed microstructure, fracture behaviour, electron probe microanalysis and X-ray diffraction.read more
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A Review on Inertia and Linear Friction Welding of Ni-Based Superalloys
TL;DR: In this paper, a review of the literature on inertia and linear friction welding of Ni-based superalloys is presented with the objective to make clarifications on discrepancies and uncertainties reported in literature regarding issues related to these two friction welding processes as well as microstructure, texture, and mechanical properties of the Ni based superalloy weldments.
Journal ArticleDOI
Effect of flux addition on the microstructure and tensile strength of dissimilar weldments involving Inconel 718 and AISI 416
K. Devendranath Ramkumar,Sidharth Dev,Vimal Saxena,Ayush Choudhary,N. Arivazhagan,S. Narayanan +5 more
TL;DR: In this article, the microstructural features of the dissimilar weldments involving Ni based superalloy Inconel 718 and martensitic stainless steel, AISI 416 that is difficult to weld were analyzed using optical and scanning electron microscopy.
Journal ArticleDOI
Analysis of Microstructural Changes Induced by Linear Friction Welding in a Nickel-Base Superalloy
TL;DR: In this article, a detailed microstructural analysis was performed on a difficult-to-weld nickel-base superalloy, IN 738, subjected to linear friction welding and Gleeble thermomechanical simulation, to understand the micro-structural changes induced in the material.
Journal ArticleDOI
Effect of Continuous and Pulsed Current on the Metallurgical and Mechanical Properties of Gas Tungsten Arc Welded AISI 4340 Aeronautical and AISI 304 L Austenitic Stainless Steel Dissimilar Joints
TL;DR: In this article, the weldability of low-alloyed aeronautical steel and AISI 304L joined by continuous current and pulsed current gas tungsten arc welding (GTAW) techniques, using ER309L and ERNiCr-3 filler metals was investigated.
Journal ArticleDOI
A Study of Linear Friction Weld Microstructure in Single Crystal CMSX-486 Superalloy
TL;DR: The microstructure of linear friction welds in single crystal (SX) CMSX 486 superalloy was studied in this article, where the application of the compressive load during the forging stage of LFW induced rapid solidification of the resultant metastable liquid phase.
References
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Journal ArticleDOI
INCONEL 718: A solidification diagram
TL;DR: In this paper, the authors used an integrated analytical approach to generate a constitution diagram for INCONEL 718* in the temperature range associated with solidification, where the important features of the diagram are an austenite (γ)/Laves phase eutectic which occurs at ≈19.1 wt pct Nb and a Laves phase which contains ≈22.4 wt nb. The distribution coefficient for Nb was found to be ≈0.5.
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