Hot Corrosion Studies on Gas Tungsten Arc Welded AISI 304 and AISI 4140 Dissimilar Joints

2012 ◽  
pp. 436-441
Author(s):  
N. Arivazhagan ◽  
K. Devendranath Ramkumar ◽  
S. Karthikeyan ◽  
M. Manikandan ◽  
S. Narayanan ◽  
...  
Keyword(s):  
Hot Corrosion ◽  
Dissimilar Joints ◽  
Aisi 304 ◽  
Gas Tungsten Arc ◽  
Corrosion Studies ◽  
Aisi 4140 ◽  
Gas Tungsten

Evolution of Microstructures on GTA Welded AISI304 Subjected to Hot Corrosion at 700°C under Na2SO4 + V2O5 (60%)

2012 ◽  
Vol 185 ◽  
pp. 84-86
Author(s):  
Sharief B. Hafeez ◽  
Kumar S. Senthil ◽  
B.K. Yeshwanth ◽  
N. Arivazhagan ◽  
Ramkumar K. Devendranath ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Corrosion Resistance ◽  
Hot Corrosion ◽  
Corrosion Products ◽  
Filler Wire ◽  
Aisi 304 ◽  
Microstructure Changes ◽  
Gas Tungsten Arc ◽  
Gas Tungsten

In this work, an attempt was made to examine the microstructure changes on the gas tungsten arc welded AISI 304 subjected to hot corrosion in Na2SO4+ V2O5(60%) at 700°C under cyclic conditions. It was found that welding of AISI 304 using E308L showed better corrosion resistance and tensile strength as compared to ENiCu-7 filler wire. The corrosion products were analyzed using SEM/EDAX and XRD.

Investigations on the Performance of Gta Welded Dissimilar Aisi 304 and Aisi 310s Subjected to Cyclic Hot Corrosion

2012 ◽  
Vol 622-623 ◽  
pp. 304-308
Author(s):  
Amar Parth Sahu ◽  
Rishi Kapoor ◽  
T. Prashanth ◽  
Jeet Kumar Kesharwani ◽  
Ramkumar K. Devendranath ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Molten Salt ◽  
Optical Microscopy ◽  
Hot Corrosion ◽  
Research Work ◽  
Air Oxidation ◽  
Aisi 304 ◽  
Edax Analysis ◽  
Gas Tungsten Arc ◽  
Corrosion Studies

This research work aims at investigating the performance of the gas tungsten arc welded dissimilar AISI 304 and AISI 310S when subjected to cyclic hot corrosion in air oxidation and in the molten salt environment of K2SO4 + 60% NaCl environment at 600°C. The weldments are characterized for its mechanical and metallurgical properties. Tensile strength of the weldment is found to be 529 Mpa. Further the hot corrosion studies are performed on the various zones of the weldment and the corrosion products are characterized by the combined techniques of optical microscopy, XRD and SEM/EDAX analysis.

Hot Corrosion Studies on Bimetallic Combinations of Monel 400 and AISI 304 Subjected to Molten Salt Environment

2011 ◽  
Vol 383-390 ◽  
pp. 3217-3222 ◽  
Author(s):  
Ramkumar K. Devendranath ◽  
N. Arivazhagan ◽  
S Narayanan
Keyword(s):  
Molten Salt ◽  
Arc Welding ◽  
Weld Zone ◽  
Analytical Techniques ◽  
Base Metals ◽  
Dissimilar Joints ◽  
Aisi 304 ◽  
Gas Tungsten Arc ◽  
Corrosion Studies ◽  
Monel 400

Dissimilar joints of Monel 400 and AISI 304 are used widely in marine and offshore environments for the fabrication of heat exchangers, evaporators, piping and vessels as well as in the chemical, petrochemical, and power generation industries. An attempt was made to weld Monel 400 and AISI 304 by gas tungsten arc welding using ENiCu-7 and E309L filler wires. A comparative analysis was carried out on these weldments so as to examine the weldability, mechanical and metallurgical properties of the weldment. In addition, corrosion behavior of these weldments has been carried out on the dissimilar weldments in K2SO4+ NaCl (60%) molten salt environment at 600°C under cyclic conditions. The oxide scales formed on the various zones of the weldment have been characterized systematically using surface analytical techniques. Weld zone was found to be more susceptible to degradation than in base metals.

Development of pulsed current gas tungsten arc welding technique for dissimilar joints of marine grade alloys

2016 ◽  
Vol 21 ◽  
pp. 201-213 ◽  
Author(s):  
K. Devendranath Ramkumar ◽  
Shah Vitesh Naren ◽  
Venkata Rama Karthik Paga ◽  
Ambuj Tiwari ◽  
N. Arivazhagan
Keyword(s):  
Arc Welding ◽  
Gas Tungsten Arc Welding ◽  
Pulsed Current ◽  
Dissimilar Joints ◽  
Gas Tungsten Arc ◽  
Gas Tungsten ◽  
Welding Technique

Hot Corrosion Studies of GTA Welded Monel 400 Exposed to Thin Film of Molten Na2so4 - 60% V2O5 at 600°C

2012 ◽  
Vol 584 ◽  
pp. 126-130
Author(s):  
Puneet Kumar Mishra ◽  
K.S. Gopalakrishnan ◽  
K. Devendranath Ramkumar ◽  
N. Arivazhagan ◽  
S. Narayanan
Keyword(s):  
Thin Film ◽  
Hot Corrosion ◽  
Research Work ◽  
Tensile Tests ◽  
Weld Interface ◽  
Corrosion Properties ◽  
Gas Tungsten Arc ◽  
Corrosion Studies ◽  
Microstructure Examination ◽  
Monel 400

In this research work, an attempt has been made to investigate the gas tungsten arc welded Monel 400 plates using ENiCu-7 for its mechanical and corrosion properties. Microstructure examination reveals the coarse grain formation of Ni-Cu phase in the heat affected zone (HAZ) and well defined dendrites are observed in the weld region. Tensile tests showed that fracture occurred at the weld interface and the ultimate tensile strength of the Monel weldment is found to be 515 MPa. Furthermore hot corrosion studies were performed on the different zones (Weld, HAZ and Base metal) of Monel 400 exposed to the thin film of molten salt environment of Na2SO4 - 60% V2O5 at 600°C. It was found that corrosion was extremely severe on the fusion zone after exposed to 50 cycles. The corrosion products were characterized using the combined techniques of optical microscopy, XRD, SEM/EDX analysis

Microstructure, Mechanical and Corrosion Behaviour of Dissimilar Weldments between AISI 304 Stainless Steels and AISI 1020 Carbon Steels Produced by Gas Tungsten Arc Welding Using Different Consumables

2009 ◽  
Vol 410-411 ◽  
pp. 533-541 ◽  
Author(s):  
W. Chuaiphan ◽  
Somrerk Chandra-ambhorn ◽  
B. Sornil ◽  
Wolfgang Bleck
Keyword(s):  
Stainless Steel ◽  
Carbon Steel ◽  
Arc Welding ◽  
Gas Tungsten Arc Welding ◽  
Chemical Compositions ◽  
Aisi 316L ◽  
Aisi 304 ◽  
Gas Tungsten Arc ◽  
Weld Metals ◽  
Gas Tungsten

Gas tungsten arc welding was applied to join AISI 304 stainless steel and AISI 1020 carbon steel sheets with three types of consumables – AISI 308L, AISI 309L and AISI 316L stainless steel wires. Weld metals produced by all consumables exhibited the identical hardness of ca. 350 HV. This value was higher than those of stainless steel and carbon steel base metals, indicating the relatively high strength of weld metals. The corrosive behaviour of weld metals was investigated by a potentiodynamic method. Specimens were tested in 3.5 wt% NaCl solution saturated by laboratory air at 27°C. A pitting potential of weld metal produced by the AISI 309L consumable was higher than those of weld metals produced by the AISI 308L and AISI 316L consumables respectively. The chemical compositions and microstructure of weld metals were also investigated. The pitting corrosion resistance of weld metals produced by different consumables is discussed in the paper in terms of the pitting resistance equivalent number (PREN) calculated from the chemical compositions and the content of delta ferrite in the austenite matrix of the weld metals.

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