Effects of filler metals on the segregation, mechanical properties and hot corrosion behaviour of pulsed current gas tungsten arc welded super-austenitic stainless steel

Ramkumar, K. Devendranath; Chandrasekhar, A.; Srivastava, Anubhav; Hidad, Preyas; Chandra, Sanskar; Dev, Sidharth; Arivazhagan, N.

doi:10.1016/j.jmapro.2016.07.006

Cited by 62 publications

(13 citation statements)

References 26 publications

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“…In general, evaluation of electrochemical corrosion, hot corrosion, and thermogravimetric analysis of base metal AISI 904L, ATIG, and HWTIG weldments reveal that both weldments exhibited higher levels of corrosion resistance and thermal stability compared to the base metal. Ramkumar et al 40 had also made a similar observation and attributed this to the presence of refined grains in the weld fusion zone. In the case of weldments, the HWTIG weldment outperformed the ATIG weldment with superior performance during the above-mentioned studies.…”

Section: Discussionmentioning

confidence: 73%

“…Arenas et al 39 employed Tafel plot and polarization techniques to check the electrochemical corrosion of 1018 carbon steel and found the corrosion rate as 3-13μm/year. Devendranath et al 40 researched the hot corrosion behavior of PCGTA-welded SASS 904L in K 2 SO 4 + 60% NaCl solution at a temperature of 650 o C and reported that Mo rich filler wire displayed higher corrosion resistance. Bellaouchou et al 41 performed hot corrosion studies of AISI 904L in a phosphoric acid solution.…”

Section: Introductionmentioning

confidence: 99%

“…Devendranath et al 40 researched the hot corrosion behavior of PCGTA-welded SASS 904L in K 2 SO 4 + 60% NaCl solution at a temperature of 650 o C and reported that Mo rich filler wire displayed higher corrosion resistance. Bellaouchou et al 41 performed hot corrosion studies of AISI 904L in a phosphoric acid solution.…”

Section: Introductionmentioning

confidence: 99%

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Corrosion studies and thermogravimetric analysis performed on activated tungsten inert gas and hot wire tungsten inert gas welded super austenitic stainless steel AISI 904L

Sunny

Korra

Muthukumaran

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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Attributed to the remarkable resistance offered against various types of corrosion, AISI 904L is used for a wide range of challenging applications. In this context, this research aims to conduct an in-depth corrosion study about the base material and weldments of 10 mm thick AISI 904L plates fabricated by autogenous activated tungsten inert gas (ATIG) welding and hot wire tungsten inert gas (HWTIG) welding techniques. The pitting resistance effective number (PREN) is analyzed to evaluate pitting corrosion resistance. The Tafel plot is drawn and evaluated for the electrochemical corrosion of base metal and weldments in a 3.5% NaCl solution, while the specimens immersed in 3.5% NaCl solution at 650oC for 24 hours are evaluated for hot corrosion behavior. Thermogravimetric analysis (TGA) is performed at 300C–9000C to study material behavior at elevated temperatures. Results indicate that the base metal, ATIG weldment, and HWTIG weldment have a PREN of 34. During Tafel plot analysis, the ATIG weldment displayed a corrosion rate of 0.02792 mm/year while the HWTIG weldment recorded 0.02091 mm/year. Corrosion rates of ATIG and HWTIG weldments during hot corrosion studies are 14.93 mm/year and 12.69 mm/year, respectively. During TGA analysis, the ATIG weldment suffered a weight loss of 12.42% while the HWTIG weldment lost only 9.68% of its weight during the process. FESEM + EDS analysis confirmed the presence of unmixed flux particles in the ATIG weldment, which could be attributed to the weldment’s poor performance. In general, this research cemented the supremacy of the HWTIG weldment over the ATIG weldment with improved corrosion resistance and thermal stability. This study also contributed to a better understanding of the corrosion behavior of AISI 904L weldments under different environments that this superior grade of stainless steel alloy may encounter during its real-life applications.

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Section: Discussionmentioning

confidence: 73%

Section: Introductionmentioning

confidence: 99%

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Corrosion studies and thermogravimetric analysis performed on activated tungsten inert gas and hot wire tungsten inert gas welded super austenitic stainless steel AISI 904L

Sunny

Korra

Muthukumaran

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…It is also reported that, the choice of filler wire for dissimilar welded joints is based on toughness, resistance to fatigue and attack of stress corrosion cracking (SCC) . 6 The fillers used for the welds consists of corrosion resistant alloying elements, for example, Ni-based alloy, is usually over alloyed in order to improve resistance to corrosion. 7 Dev et al 8 studied on joints of stainless steel 416 and Ni-Cr based alloy Inconel 718 developed by pulsed current TIG process.…”

Section: Introductionmentioning

confidence: 99%

Study of metallurgical changes and mechanical properties of dissimilar weldments developed by interpulse current TIG welding technique

Yelamasetti¹,

Vardhan²,

Ramana³

2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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This research manuscript compares the metallurgical changes and mechanical behavior of AISI 316 and Monel 400 dissimilar weldments developed by Interpulse TIG welding process with ERNiCrMo-3 and ER316 filler wires. Metallurgical aspects are envisioned by using optical and scanning electron microscopes. Mechanical behavior of welded joints were studied by conducting tensile and microhardness tests. Metallurgical study has shown that the ERNiCrMo-3 filler weldment divulged completely with austenitic phase structure at the weld zone. Also, at the HAZ of Monel 400 clear grain boundaries with fine grains were observed. The mechanical properties corroborated that the weld strength of ERNiCrMo-3 weldment was found better than the ER316 weldment. Microhardness on the weldment made of ERNiCrMo-3 filler has shown higher values than that of base metals. Weldment made by ER316 was observed to fail near the interface of Monel 400 under tensile test due to the existence of micro-pores and partially melted zones. Further, the metallurgical and mechanical properties are compared with that of the weldment developed by TIG welding process.

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“…GTAW can be used to weld butt joint using the addition of filler metals or without filler metals (also known as Autogenous welding) [10]. Some researchers investigated the effect of different filler metals to join similar aluminium alloys [11] and super-austenitic steel [12]. On the other hand, researchers have performed dissimilar joint material such as aluminium to galvanized steel [13] and aluminium to stainless steel [14].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Welding Parameter on Mechanical Properties and Macrostructure of AA1100 Using Autogenous Tig Welding

Baskoro¹,

Milyardi

Amat

2020

IJAME

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In this paper, an autogenous tungsten inert gas (TIG) welding was performed to understand the characteristic effect of butt joint weld on AA1100 under various parameters. The effect of TIG current and welding speed was selected to study the mechanical properties, porosity, and macrostructure of the weld metal (WM). Based on experimental results, the top bead width (TBW) will increase directly proportional to the increased of welding current. Furthermore, welding current and welding speed affected the strength drop in the heat-affected zone (HAZ). More heat added will result in a deeper drop in strength. Mechanical properties result showed that the tensile strength reduced by 40 – 45% and the hardness reduction in the WM and HAZ area from the base metal (BM) was 17.3% and 27.7%, respectively. Subsequently, X-Ray radiography images showed that there was no large porosity occur in all welding current. The macrostructure showed that the weld bead typically has the concavity shape or U-shaped geometry from a cross-sectional view.

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Effects of filler metals on the segregation, mechanical properties and hot corrosion behaviour of pulsed current gas tungsten arc welded super-austenitic stainless steel

Cited by 62 publications

References 26 publications

Corrosion studies and thermogravimetric analysis performed on activated tungsten inert gas and hot wire tungsten inert gas welded super austenitic stainless steel AISI 904L

Corrosion studies and thermogravimetric analysis performed on activated tungsten inert gas and hot wire tungsten inert gas welded super austenitic stainless steel AISI 904L

Study of metallurgical changes and mechanical properties of dissimilar weldments developed by interpulse current TIG welding technique

The Effect of Welding Parameter on Mechanical Properties and Macrostructure of AA1100 Using Autogenous Tig Welding

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