Journal ArticleDOI
Effect of Pulsed Current on the Microstructure, Mechanical Properties and Corrosion Behavior of Ni-Based Alloy/Super Duplex Stainless Steel Dissimilar Welds
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In this paper, the effect of pulsed current and pass number on the microstructure, mechanical properties and corrosion behavior of Incoloy 825/UNS S32750 welds was addressed.Abstract:
This work addressed the effect of pulsed current (PC) and pass number on the microstructure, mechanical properties and corrosion behavior of Incoloy 825/UNS S32750 welds. The alloys were welded using PC and continuous current techniques. Mechanical properties of the weldments were examined using hardness, Charpy and transverse tensile tests. General corrosion and pitting corrosion behavior of the weld metals were studied using potentiodynamic polarization and electrochemical impedance spectroscopy tests. The weld metals had a dual-phase microstructure including ferrite and austenite phases. Employing the PC mode resulted in an increase in the ferrite content of the weld metals, which led to the improvement in impact resistance. Based on the results of tensile tests, the weakest part of the weldments was Incoloy 825 base. The weld metals at the root pass showed the weakest corrosion behavior. Overall, use of the PC mode improved the properties of the weldments.read more
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Journal ArticleDOI
Micro-texture and corrosion behavior of dissimilar joints of UNS S32750 stainless steel/UNS N08825 Ni-based superalloy
TL;DR: In this article, the effect of the welding current mode on microtexture and corrosion behavior of UNS S32750 stainless steel/UNS N08825 Ni-based superalloy welds was studied.
Journal ArticleDOI
Prospects of pulsed current arc welding on aerospace grade Hastelloy X
TL;DR: The conventional constant current arc welding of Hastelloy X (Ni-Cr-Fe-Mo) leads to the solidification and liquation cracks in the weldment as discussed by the authors.
Journal ArticleDOI
Microstructure and electrochemical evaluation of ER-308L weld overlays on AISI 321 stainless steel for repair applications
N. Pravin Kumar,Gosipathala Sreedhar,S. Mohan Kumar,B. Girinath,A. Rajesh Kannan,R. Pramod,N. Siva Shanmugam,M. Vishnukumar +7 more
TL;DR: In this article , the authors deal with the deposition of ER-308L weld overlays on AISI 321 plate with Robotic gas metal arc welding setup and conduct electrochemical analysis using Potentiodynamic polarization and double-loop electrochemical potentiokinetic reactivation measurements.
Journal ArticleDOI
Effect of MBF-20 Interlayer on the Microstructure and Corrosion Behaviour of Inconel 625 Super Alloy after Diffusion Brazing
Hamid Omidvar,Ali Dastgheib,Mohammad Khorram,Armin Rajabi,Amir Hossein Baghdadi,Mariyam Jameelah Ghazali +5 more
TL;DR: In this paper , the authors used field emission scanning electron microscopy (FESEM) to observe the microstructure equipped with ultra-thin window energy dispersive X-ray spectrometer (EDS) system.
References
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Welding Metallurgy and Weldability of Stainless Steels
TL;DR: In this article, the authors introduce phase diagrams and constitution diagrams for welding of stainless steel welds, as well as a Weldability Testing Appendix 1: Nominal Compositions of Stainless Steels Appendix 2: Etching Techniques for Stainless Steel Welds Author Index Subject Index
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Dissimilar welding of AISI 310 austenitic stainless steel to nickel-based alloy Inconel 657
TL;DR: In this paper, the authors compared welding of AISI 310 austenitic stainless steel to Inconel 657 nickel-chromium superalloy and showed that Inconels A showed the least susceptibility to hot cracking.
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
An assessment of microstructure, mechanical properties and corrosion resistance of dissimilar welds between Inconel 718 and 310S austenitic stainless steel
A. Mortezaie,Morteza Shamanian +1 more
TL;DR: In this paper, a dissimilar welding between Inconel 718 nickel-base superalloy and 310S austenitic stainless steel using gas tungsten arc welding process was performed to determine the relationship between the microstructure of the welds and the resultant mechanical and corrosion properties.