Studies on the structure–property relationships and corrosion behaviour of the activated flux TIG welding of UNS S32750

Ramkumar, K. Devendranath; Goutham, P. Siva; Radhakrishna, V. Sai; Tiwari, Ambuj; Anirudh, S.

doi:10.1016/j.jmapro.2016.05.006

Cited by 48 publications

(9 citation statements)

References 20 publications

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“…The first of such coatings was developed by Gurevich et al during the 1960s at the Paton Welding Institute in Kiev, former USSR (now Ukraine). The coating-sprayed or applied by a brush-contains powdered metal oxides such as TiO 2 , Al 2 O 3 , SiO 2 , NiO, MnO 3 , Cr 2 O 3 , CeO 2 , and V 2 O 5 [15][16][17][18][19], in ethanol, methanol, or acetone solvents [20]. The coated surface is usually approximately 0.15 mm thick [21].…”

Section: Introductionmentioning

confidence: 99%

Metal Oxide Nanoparticle-Based Coating as a Catalyzer for A-TIG Welding: Critical Raw Material Perspective

Baloš

Dramićanin

Janjatovic

et al. 2019

Metals

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Besides a wide application in corrosion protection, wear resistance increase, providing thermal properties and power conversion, oxide coatings have found an alternative application in welding technology as catalysts of the tungsten inert gas (TIG) welding process. In this paper, the novel approach of fabricating a coating containing nanoparticles based on nanosized SiO2 and TiO2 and their mixtures was applied to the austenitic stainless-steel base metal. It was found that coatings increased depths of penetration, enabling a consumable-free welding. Using this method, the use of several critical and near-critical raw materials (e.g., Si and Cr), as well as the relatively expensive Ni can be completely avoided. The most effective coating in terms of weld penetration consisted of a mixture of nanoparticles, rather than unary oxide coatings based on nanoparticles. A model for liquid weld metal flow is proposed based on the metallographic examination of recrystallized grains and microhardnesses measured near the weld metal, supporting the reversed Marangoni convection theory.

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Section: Introductionmentioning

confidence: 99%

Metal Oxide Nanoparticle-Based Coating as a Catalyzer for A-TIG Welding: Critical Raw Material Perspective

Baloš

Dramićanin

Janjatovic

et al. 2019

Metals

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“…Super duplex stainless steel (SDSS), such as UNS S32750 and S32760, has been extensively employed in power plants, marine transformations, petrochemical plants, modern oil platforms, and off-shore processing equipment due to its unique combination of superior corrosion resistance and mechanical properties as compared to austenitic stainless steel (ASS), for instance type 316L, 316LN, or 304L [1][2][3][4][5][6]. The superior chemical and mechanical properties of SDSS originate from the two-phase balanced microstructure of ferrite and austenite.…”

Section: Introductionmentioning

confidence: 99%

Unmixing behaviour in dissimilar laser welds for duplex and austenitic stainless steels

Chun

Lee

Kang

2019

Science and Technology of Welding and Joining

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Metallurgical characteristics of single-mode laser dissimilar welds between super duplex (UNS S32750) and austenitic (type 316L) stainless steels is the existence of an unmixed zone that originates from each base metal. It was confirmed that the unmixed zone that flowed out from the 316L had the microstructural morphology of primary austenite with secondary δ-ferrite solidification mode, while the morphology of a δ-ferrite single phase solidification mode was observed within the unmixed zone that flowed out from the S32750. Furthermore, it could be speculated that each unmixed zone that flowed out from 316L and S32750 coexisted independently in terms of crystallographic aspect (orientation distribution function and predominant orientation relationship) analysed by electron backscatter diffraction.

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“…In comparison to typical TIG welding, SiO2 flux generated welds with good root pass penetration, whereas Al2O3 flux caused weld depth to deteriorate. Ramkumar et al [16] during the GTAW process of 5 mm thick duplex stainless steel UNS S32205 plates thickness, the influence of different oxide fluxes, NiO, MoO3, and SiO2, on microstructure, mechanical, and corrosion properties was investigated. The existence of various types of austenite was discovered in all specimens, and the hardness of the weld region for all specimens was on par with the base metal.…”

Section: Effect Of Fluxes During Tig Welding Of Ferrous Alloysmentioning

confidence: 99%

Activated flux induced Tungsten inert gas welding of Ferrous alloys - A Review

Rakesh

Rameshkumar²

2022

J. Phys.: Conf. Ser.

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Ferrous alloys are employed in a range of fields, including aerospace, construction, automobiles and chemical processing. One of the most used welding processes for the fusion of ferrous metals is gas tungsten arc (GTA) welding or Tungsten Inert Gas (TIG) welding. Due to the lower amount of penetration accomplished using only one pass, welding is less frequent in some industrial situations. Fluxes have been discovered to improve the penetration depth of GTA welding, resulting in increased productivity. The research on Activated flux induced TIG (A-TIG) welding of ferrous alloys is discussed in this publication. The effect of fluxes during TIG welding, the effect of weld parameters on weld morphology, and the usage of fluxes in dissimilar welds of ferrous alloys are all discussed in this study. The mechanisms involved in enhancement of penetration depth, the types of fluxes used, the effect of fluxes on mechanical properties and microstructures are discussed. The study also gives an insight on areas less explored.

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Studies on the structure–property relationships and corrosion behaviour of the activated flux TIG welding of UNS S32750

Cited by 48 publications

References 20 publications

Metal Oxide Nanoparticle-Based Coating as a Catalyzer for A-TIG Welding: Critical Raw Material Perspective

Metal Oxide Nanoparticle-Based Coating as a Catalyzer for A-TIG Welding: Critical Raw Material Perspective

Unmixing behaviour in dissimilar laser welds for duplex and austenitic stainless steels

Activated flux induced Tungsten inert gas welding of Ferrous alloys - A Review

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