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.

Influence of Filler Materials on Mechanical and Hot Corrosion Properties of Gas Tungsten Arc Welded AISI 304

2012 ◽  
Vol 185 ◽  
pp. 113-115 ◽  
Author(s):  
R. Mohanraj ◽  
Kumar D. Rajesh ◽  
Kumar M. Yeswanth ◽  
N. Arivazhagan ◽  
Ramkumar K. Devendranath ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Corrosion Resistance ◽  
Comparative Analysis ◽  
Filler Materials ◽  
Air Oxidation ◽  
Corrosion Properties ◽  
Aisi 304 ◽  
Edax Analysis ◽  
Gas Tungsten Arc ◽  
Mechanical And Corrosion Properties

This paper investigated the influence of filler materials such as E308L and ENiCu-7 utilized in the GTA welded AISI 304 with respect to mechanical and corrosion properties. It was found that E308L had shown better tensile strength and corrosion resistance as compared to ENiCu-7. A comparative analysis had been made on the different regions of the weldment subjected to cyclic air oxidation at 700°C. The corrosion products were examined using XRD and SEM/EDAX analysis.

Effect of Mo-rich Fillers in Pulsed Current Gas Tungsten Arc Welding of Inconel 718 for Improved Strength and Hot Corrosion Resistance

2017 ◽  
Vol 26 (11) ◽  
pp. 5620-5640 ◽  
Author(s):  
K. Devendranath Ramkumar ◽  
Aman Jayesh Bhalodi ◽  
Harsh Jivani Ashokbhai ◽  
Abhijit Balaji ◽  
S. Aravind ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Hot Corrosion ◽  
Arc Welding ◽  
Inconel 718 ◽  
Gas Tungsten Arc Welding ◽  
Pulsed Current ◽  
Gas Tungsten Arc ◽  
Gas Tungsten

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.

scholarly journals Effect of Friction Stir Processing on Gas Tungsten Arc-Welded and Friction Stir-Welded 5083-H111 Aluminium Alloy Joints

2019 ◽  
Vol 2019 ◽  
pp. 1-14 ◽  
Author(s):  
Sipokazi Mabuwa ◽  
Velaphi Msomi
Keyword(s):  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Aluminium Alloy ◽  
Friction Stir Processing ◽  
Welded Joints ◽  
Ultrafine Grain ◽  
Dimple Size ◽  
Friction Stir ◽  
Gas Tungsten Arc ◽  
Gas Tungsten

This paper presents the analysis of the friction stir-processed aluminium alloy 5083-H111 gas tungsten arc-welded and friction stir-welded joints. The comparative analysis was performed on the processed and unprocessed gas tungsten arc-welded and friction stir-welded joints of similar aluminium alloy 5083-H111. The results showed a clear distinction between the friction stir processed joints and unprocessed joints. There is a good correlation observed between the microstructural results and the tensile results. Ultrafine grain sizes of 4.62 μm and 7.177 μm were observed on the microstructure of the friction stir-processed friction stir-welded and gas tungsten arc-welded joints. The ultimate tensile strength for friction stir-welded and gas tungsten arc-welded before friction stir processing was 153.75 and 262.083 MPa, respectively. The ultimate tensile strength for friction stir processed friction stir-welded joint was 303.153 MPa and gas tungsten arc-welded joints one was 249.917 MPa. The microhardness values for the unprocessed friction stir-welded and gas tungsten arc-welded joints were both approximately 87 HV, while those of the friction stir-processed ones were 86.5 and 86 HV, respectively. The application of friction stir processing transformed the gas tungsten arc morphology from brittle to ductile dimples and reduced the ductile dimple size of the unprocessed friction stir-welded joints from the range of 4.90–38.33 μm to 3.35–15.59 μm.

Hot Corrosion of Co-based Alloys with 25%NaCl+75%Na2SO4 Coating at 1173 K

2013 ◽  
Vol 32 (3) ◽  
pp. 317-321 ◽  
Author(s):  
Guangyan Fu ◽  
Xingxing Guo ◽  
Qun Liu ◽  
Xin Zhao ◽  
Yong Su
Keyword(s):  
Corrosion Resistance ◽  
Hot Corrosion ◽  
Middle Layer ◽  
Mass Gain ◽  
Corrosion Products ◽  
Chromium Sulfide ◽  
Three Samples ◽  
Innermost Layer ◽  
Inside Layer ◽  
Better Than

AbstractHot corrosion behavior of pure Co, Co-10Cr and Co-10Cr-5Al alloys in the presence of a salt coat of Na2SO4+NaCl in air at 1173 K was studied. The results indicated that among the three samples, the mass gain of Co-10Cr-5Al alloy is the smallest, while that of Co-10Cr is biggest. The corrosion products of Co-10Cr-5Al can be divided into three layers, of which the outside layer is CoO, the middle layer consists of Cr2O3 and Al2O3, and the inside layer is a small amount of Chromium sulfide and aluminum sulfide. The corrosion products of Co-10Cr can also be divided into three layers, from the outermost to the innermost layer are CoO, Cr2O3, and small amount of Cr2S3. The corrosion resistance of Co-10Cr-5Al alloy is better than that of Co-10Cr alloy.

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