2014
DOI: 10.1590/1516-1439.274314
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Hot corrosion behavior of monel 400 and AISI 304 dissimilar weldments exposed in the molten salt environment containing Na2SO4 + 60% V2O5 at 600 °C

Abstract: This research work investigates the use of pulsed current for joining two dissimilar metals Monel 400 and AOSO 304 using Pulsed Current Gas Tungsten Arc welding using three different filler metals such as ER309L, ERNiCu-7 and ERNiCrFe-3. Microstructure observations showed the presence of Partially Melted Zone (PMZ) at the heat affected zone (HAZ) of all the weldments. The formation of secondary phases was witnessed at the HAZ of Monel 400 on using ERNiCu-7 filler. Tensile studies corroborated that the bimetall… Show more

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Cited by 14 publications
(5 citation statements)
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“…However, the precipitation strengthening capacity in the Ni-Cu alloy system can be improved with appropriate alloying element additions and heat treatment. Ni-Cu alloys are easily weldable [97] and were successfully used as an input material in powder based [98] and wire arc additive manufacturing [99]. Development of these modern technologies allows to apply the Ni-Cu alloys as a surface cladding material for protection of less corrosion resistant core or in components with mechanical properties gradient.…”
Section: Mechanical Propertiesmentioning
confidence: 99%
“…However, the precipitation strengthening capacity in the Ni-Cu alloy system can be improved with appropriate alloying element additions and heat treatment. Ni-Cu alloys are easily weldable [97] and were successfully used as an input material in powder based [98] and wire arc additive manufacturing [99]. Development of these modern technologies allows to apply the Ni-Cu alloys as a surface cladding material for protection of less corrosion resistant core or in components with mechanical properties gradient.…”
Section: Mechanical Propertiesmentioning
confidence: 99%
“…Selection of filler metal and its dilution with the base metal also play a major role in the weldment's corrosion behavior, when exposed to the aggressive environments. Devendranath et al [30,31] studied the effects of various filler wires (E309L, ENiCu-7, and ERNiCrFe-3) on the hot corrosion behavior of Monel 400 and AISI 304 dissimilar weldment subjected to cyclic air oxidation and a K 2 SO 4 + NaCl (60%) molten salt environment at 600°C. The author investigated the dilution of different filler metals with base metals and the influence on weldment corrosion in the different environments.…”
Section: Effect Of Filler Wirementioning
confidence: 99%
“…Monel K alloy (containing Ti and Al) has also been investigated under corrosive conditions and has been shown to have a lower corrosion rate than Monel (with no Ti and Al) [12]. Hot corrosion behavior of Monel has also been investigated [13]. The corrosion of Monel in aerated and deaerated sodium chloride solutions showed a higher corrosion rate in aerated solutions [14,15].…”
Section: Introductionmentioning
confidence: 99%