Characterization of Microstructure and Mechanical Properties of Inconel 625 and AISI 304 Dissimilar Weldments

Ramkumar, K. Devendranath; Mithilesh, P.; Varun, D.; Reddy, Ajay Reddy Gopi; Natarajan, Arivazhagan; Narayanan, S.; Kumar, K. Gokul

doi:10.2355/isijinternational.54.900

Cited by 33 publications

(11 citation statements)

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“…It is often used as dissimilar joints, with several metals in field applications. For example, bimetallic joints of Inconel 625 and AISI 304 L are used in high temperature media in thermal power and nuclear power plants to cryogenic applications [4]. Bimetallic joints of Inconel 625 and duplex stainless steel pipes are used in sub-sea manifolds [5].…”

Section: Introductionmentioning

confidence: 99%

Microstructural and Mechanical Characterization of Dissimilar Metal Welding of Inconel 625 and AISI 316L

Dökme

Külekçi

Eşme

2018

Metals

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This study investigated the microstructure of the dissimilar metal welding of Inconel 625 and AISI 316L using Continuous Current Gas Tungsten Arc Welding (CCGTAW) and Pulsed Current Gas Tungsten Arc Welding (PCGTAW) processes with ERNiCr-3, TIG 316L and twisted (ERNiCr-3 and TIG 316L) fillers. Microstructure examinations were carried out using an optical microscope and Scanning Electron Microscopy (SEM)/Energy Dispersive X-Ray (EDAX). The results of the study showed the existence of a partially melted zone (PMZ) on the AISI 316L side. Weld zone (WZ) analysis showed the existence of a multi-directional grain growth on the 316L side in all specimens, although less growth was found on the Inconel 625 side. Grain growth almost disappeared using PCGTAW with twisted fillers. SEM/EDAX investigations indicated that secondary deleterious secondary phases were tiny and white in five experiments. However, a meager amount of precipitates occurred in PCGTA welding with twisted fillers. Moreover, these were particularly innocent precipitates, represented by black dots in images, whereas other tiny white secondary phases are known to be brittle. As a result, PCGTA welding with twisted fillers exhibited the best metallurgical properties.

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Section: Introductionmentioning

confidence: 99%

Microstructural and Mechanical Characterization of Dissimilar Metal Welding of Inconel 625 and AISI 316L

Dökme

Külekçi

Eşme

2018

Metals

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“…Patterson et al [11] observed the solidification cracking at the weld zone during the autogenous gas tungsten arc welding of Inconel 625 and 304L stainless steel. Studies made by Devendranath Ramkumar et al [12] on the dissimilar joints of Inconel 625 and AISI 304 clearly showed the precipitation of chromium carbides at the HAZ of stainless steel. Due to the presence of higher amounts of Nb content in the filler metal, enriched segregation was observed at the HAZ of Inconel 625.…”

Section: Introductionmentioning

confidence: 95%

“…Further, the authors recommended that the use of the pulsed mode of GTA welding process for eliminating the formation of these phases. Several researchers reported on the advantageous aspects such as improvement in strength and ductility while employing the pulsed current GTA welding on different materials [12,[15][16][17]. Devendranath et al [18] investigated the comparative analysis on the CCGTA and PCGTA weldments of Inconel 718 and AISI 316L using ER2553 and ERNiCu-7…”

Section: Introductionmentioning

confidence: 99%

Metallurgical Investigations on Bimetallic Weld Joints in Austenitic/Ferritic Stainless Steels for Paper-Pulp Industries

Porchilamban¹,

Tjprc²

2018

IJMPERD

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This research article investigated metallurgical and weldability properties of AISI 316L and AISI 430 stainless steel weld-joints obtained by pulsing current gas tungsten arc welding (PCGTAW) process by employing ERNiCr-3 and ER2209 filler wires. Microstructural investigations witnessed the migrated grain boundaries at the weld zone of ERNiCr-3 and coarsened grains were very minimal at ER2209 weldments. This study is highly in demand in paper and pulp industries and successfully addressed the choice of fillers and detailed study has been carried out to analyze the structure-property relationships of these weldments using the combined techniques of scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) analysis.

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“…(Figura 3 e)), grosseira devido ao fato de ser a estrutura bruta de solidificação. Já a zona afetada pelo calor apresenta os maiores valores de dureza, tendo em vista que é uma região na qual ocorrem modificações estruturais devido ao calor gerado na solda, ocasionando crescimento de grão, refino de grão, formação de precipitados (Figura 3 c) e d)), aumentando, na média, a dureza naquela região provavelmente na região de refino de grão, juntamente com a presença de precipitados intermetálicos [10]. A Figura 4 colaborou na identificação da extensão da zona afetada pelo calor devido ao input de calor da solda, Juntamente com as micrografias apresentadas na figura 3.…”

Section: Durezaunclassified

Microestrutura E Resistência À Corrosão De Junta Soldada De Inconel 625

Ramos¹,

Caselani²,

Simoni³

et al. 2017

Anais Do Enemet - Encontro Nacional De Estudantes De Engenharia Metalúrgica, De Materiais E De Minas

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ResumoAs superligas de níquel apresentam boa combinação de resistência à corrosão e à oxidação, resistência mecânica, resistência à fadiga e à fluência, além de conseguirem operar em temperaturas elevadas, mantendo tais propriedades. A liga Inconel 625 vem sendo estudada como revestimentos, obtidos por cladeamento ou aspersão térmica, para tubos de aços ao carbono utilizados nas indústrias de petróleo e gás. Esses tubos poderão ser unidos pela técnica de soldagem, quando então se obtém uma junta Inconel-Inconel, e isso pode acarretar modificações nas propriedades dessas superligas. O presente trabalho objetiva obter uma junta soldada da liga Inconel 625 empregandose o processo de soldagem a arco utilizando eletrodo revestido Ni-Cr-Mo 3 e caracterizar o cordão de solda quanto à microestrutura, à dureza e à corrosão. A microestrutura foi avaliada por microscopia óptica; para dureza foi realizado perfil de microdureza Vickers ao longo da junta soldada; quanto à corrosão foram realizadas curvas potenciodinâmicas em três diferentes soluções: 3,5% NaCl, 3,5% NaCl + 0,01M Na 2 S 2 O 3 e 3,5% NaCl + 1N H 2 SO 4 . Os resultados obtidos mostraram que a zona fundida tem microestrutura dendrítica, sendo a zona afetada pelo calor de aproximadamente 1,2 mm de extensão. A solda não alterou significativamente as propriedades de corrosão e dureza. Palavras-chave: Inconel 625; Soldagem; Corrosão; Microestrutura. MICROSTRUCTURE AND CORROSION RESISTANCE OF WELD JOINT INCONEL 625 AbstractNickel-based superalloys show a great combination of strength, corrosion, fatigue, creep and oxidation resistance, in addition to the ability of operate in high temperatures. Alloy 625 has been investigated recently like a coating on carbon steel tubes utilized in oil and gas industry utilizing cladding or thermal spray process. These tubes can be joint by welding, however, this process may changes some properties in weld joints InconelInconel. So, the main target of this work is to perform the Inconel 625 weld joint by shielded metal arc welding process with ERCrNiMo-3 and characterize the microstructure, corrosion resistance and hardness. The microstructure was investigated by optical microscopy. Microhardness Vickers profile was done across the joint transverse section. Electrochemical polarization techniques were used to characterize the corrosion resistance in three different solutions: 3.5% NaCl, 3.5% NaCl + 0.01M Na 2 S 2 O 3 e 3.5% NaCl + 1N H 2 SO 4 . The results show that fusion zone microstructure is dendritic and the heat input modified the base metal around 1.2 mm. The weld did not significative modification of corrosion resistance and hardness.

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Characterization of Microstructure and Mechanical Properties of Inconel 625 and AISI 304 Dissimilar Weldments

Cited by 33 publications

References 11 publications

Microstructural and Mechanical Characterization of Dissimilar Metal Welding of Inconel 625 and AISI 316L

Microstructural and Mechanical Characterization of Dissimilar Metal Welding of Inconel 625 and AISI 316L

Metallurgical Investigations on Bimetallic Weld Joints in Austenitic/Ferritic Stainless Steels for Paper-Pulp Industries

Microestrutura E Resistência À Corrosão De Junta Soldada De Inconel 625

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