Identification of Optimized Welding Conditions for Pulsed Current Gas Metal Arc Welding of AISI 904 Super Austenitic Stainless Steel

2015 ◽  
Vol 787 ◽  
pp. 500-504
Author(s):  
P. Manavalan ◽  
S. Ravi ◽  
R. Kesavan
Keyword(s):  
Tensile Strength ◽  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Arc Welding ◽  
Gas Metal Arc Welding ◽  
Optimization Techniques ◽  
Pulsed Current ◽  
Metal Arc Welding ◽  
Pulse On Time ◽  
Super Austenitic Stainless Steel

The present investigation is aimed to study the effect of pulsed current gas metal arc welding on the tensile strength of AISI 904L super austenitic stainless steel joint 1.2 mm diameter solid wire of same composition. The joints were fabricated using pulsed current gas metal arc welding and by varying five factors such as peak current, pulse on time, pulse on frequency, background current and welding speed at five different levels. Design matrix based on central composite rotatable design was selected to conduct the experiment and an attempt is made to maximize the tensile strength by optimizing the factors using graphical and numerical optimization techniques. Results were correlated with weld metal microstructures.

scholarly journals Effects of Welding Power Input on the Microstructure and Impact Toughness of the Heat Affected Zone of 304L Austenitic Stainless Steel

2019 ◽  
Vol 4 (1) ◽  
Author(s):  
Akinlabi Oyetunji ◽  
Muideen A Bodude ◽  
Wasiu A Ayoola ◽  
Bolarinwa J Kutelu
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Impact Toughness ◽  
Heat Affected Zone ◽  
Arc Welding ◽  
Gas Metal Arc Welding ◽  
Power Input ◽  
Emission Spectrometry ◽  
Carbide Formation ◽  
Metal Arc Welding

The effects of welding power input on the microstructural characteristics and impact behaviour of the Heat Affected Zone (HAZ) of type 304L austenitic stainless steel were investigated. This is with a view to optimize the welding process and ensure high weldment integrity of the heat affected zone.  Chemical analysis of the as-received 304L austenitic stainless steel was determined using an Optical Emission Spectrometry AR 4 30 metal analyzer. Thereafter, 30 samples of the as-received 304L austenitic stainless steel plate with dimensions  of 70 mm length, 45 mm breadth and 8 mm thickness  were cut and labeled into A, B and C each of 10 numbers. The grouped samples were further cut into two equal halves with hacksaw and welded using Gas Metal Arc Welding (GTAW) process and 304L electrode to produce butt joint HAZ square geometry samples. The obtained HAZ and as-received samples were machined to standard charpy impact test specimens.  Also, the HAZ and as-received specimens were prepared for microscopy studies using optical microscopy. Results obtained showed that the microstructures are composed majorly of mixture of austenite and ferrite phases, also variations in volume fraction and grain size of the phases were observed under varied range of power input. In addition, chromium carbide formation and precipitation due to sensitization was seen at the grain boundaries. Optimum impact toughness (IT) of 42 J was obtained for HAZ sample at power input of 12.0 KW while the least IT of 39 J was obtained from sample welded using power input of 4.6 KW as compared with the as-received with IT of 58 J.Keywords - 304L austenitic stainless steel; gas metal arc welding; impact toughness; microstructures;

A Study of Filler Metal Effecting on Mechanical Properties for Dissimilar Gas Metal Arc Welding (GMAW) for Austenitic Stainless Steel

2013 ◽  
Vol 647 ◽  
pp. 692-696 ◽  
Author(s):  
Kaewkuekool Sittichai ◽  
Laemlaksakul Vanchai ◽  
Rodsung Detnarong
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Electric Current ◽  
Arc Welding ◽  
Filler Metal ◽  
Gas Metal Arc Welding ◽  
Aisi 304 ◽  
Metal Arc Welding ◽  
Steel Aisi

The objective of this research was to study the effect of filler metal, which was influenced to mechanical properties welding of Austenitic Stainless Steel AISI 304 on gas metal arc welding (GMAW) process. Factorial design was applied for this study. Factors studied were consisted of filler metal, electric current, and speed of welding at each factor was set at three levels. Results revealed that interaction effect between electric current, and speed was affected to ultimate tensile strength and elongation significantly different at level of .01 and .05, respectively. Finally, main effect of speed factors was affected to yield point significantly different at the level of .05.

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