Evaluating the Impact Toughness of Mild Steel Welded Joint Using Taguchi Method in Automated Shielded Metal Arc Welding

2021 ◽  
pp. 341-348
Author(s):  
Shamini Janasekaran ◽  
Walisijiang Tayier ◽  
Hong Seng Guan ◽  
Teo Hiu Hong
Keyword(s):  
Impact Toughness ◽  
Taguchi Method ◽  
Mild Steel ◽  
Arc Welding ◽  
Welded Joint ◽  
Shielded Metal Arc Welding ◽  
Metal Arc Welding ◽  
The Impact

scholarly journals Variation of Microstructural and Mechanical Properties With Respect to Polarity in Shielded Metal Arc Welding of Mild Steel

2019 ◽  
Vol 4 (2) ◽  
pp. 521-530 ◽  
Author(s):  
Bijaya Kumar Khamari ◽  
Balamurali Gunji ◽  
Swapan Kumar Karak ◽  
Bibhuti Bhusan Biswal
Keyword(s):  
Impact Strength ◽  
Mild Steel ◽  
Arc Welding ◽  
Maximum Growth ◽  
Work Piece ◽  
Shielded Metal Arc Welding ◽  
Double Pass ◽  
Material Thickness ◽  
Metal Arc Welding ◽  
The Impact

Welding has been done by taking mild steel as work piece material in shielded metal arc welding (SMAW) process. Material thickness and current were considered as input parameters. Joining of metals has been completed in two ways. In first process double pass welding has been done in which 1st pass was in reverse polarity and the second pass was in straight polarity and in the 2nd process both the passes of welding were completed with straight polarity. The comparison of microstructure and impact toughness has been investigated. It was found that more amount of heat was generated in the 2nd process as compared to the 1st process. Therefore, growths of grains in heat affected zone occurred and maximum growth occurred in 2nd than 1st process. Impact strength increased with decrease in current value and increase in material thickness respectively. The impact strength values for 1st process welding were relatively less as compared to 2nd process.

Experimental investigations on P22/P91 dissimilar shielded metal arc welds for power plant applications

2020 ◽  
Vol 234 (10) ◽  
pp. 1313-1324
Author(s):  
Sumit Mahajan ◽  
Rahul Chhibber
Keyword(s):  
Arc Welding ◽  
Structural Integrity ◽  
Operating Conditions ◽  
Experimental Investigations ◽  
Low Alloy Steel ◽  
Shielded Metal Arc Welding ◽  
Dissimilar Weld ◽  
Metal Arc Welding ◽  
Temperature Operating ◽  
The Impact

This article deals with the development of shielded metal arc welding electrodes for P22/P91 welds. A comparison has also been drawn with commercially available electrodes. P22 low alloy steel matching electrodes developed in the laboratory using a mixture design approach was employed to fabricate the dissimilar weld. Experimentations were performed to evaluate the microstructure and mechanical properties of microhardness, tensile strength, and impact energy of the welds. The impact strength was found to improve by 19% for a laboratory developed electrode made welds as compared to the commercial electrodes. The weld chemistry investigations indicate that the weld fabricated with laboratory-developed electrodes have a higher amount of chromium and molybdenum. These elements are known to enhance the corrosion resistance of joint, thereby imparting enhanced structural integrity in high temperature operating conditions. The electrodes designed and developed in this work are found to enhance the properties of P22/P91 joint much better as compared to that with the commercial electrodes.

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