Manabendra Saha

Bio: Manabendra Saha is an academic researcher. The author has contributed to research in topics: Ultimate tensile strength & Tensile testing. The author has an hindex of 1, co-authored 1 publications receiving 4 citations.

Effect of TIG Welding Parameter of Welded Joint of Stainless Steel SS304 by TIG Welding

Abstract: TIG welding of stainless steel sheets depends on a large number of factors. Due to practical constraints, four dominant parameters were considered during experimental investigation. The values of the parameters were selected on the basis of material characteristics and equipment available in the industry for experimentation. The existing process of welding the hoarding pipes was studied. Design of experiments technique was used for planning the experiments. Optimum welding parameters were determined for improved ultimate tensile strength, hardness and depth of penetration. The selection of optimum parameters was confirmed by mechanical testing - destructive as well as nondestructive. Welding of stainless steel SS304 by using optimized parameters resulted in improvement in joint tensile strength and hardness by 10.56% and 7.36%, respectively. The quality of welded joints was also checked for internal flaws using ultrasonic testing.

Modeling of Bending Properties of Stainless Steel 304 Sheets Welded by Tungsten Inert Gas Welding Process

Abstract: In this research, the effects of both current and argon gas pressure on the bending properties of welded joints were studied. Using the possible ranges of welding gas pressures and currents, Tungsten inert gas welding (TIG) of stainless steel (304) sheet was used to obtain their influence on the maximum bending force of the (TIG) welded joints. Design of experiment (DOE) ‘version 10' was used to determine the design matrix of experiments depending on the used levels of the input factors. Response surface methodology (RSM) technique was used to obtain an empirical mathematical model for the maximum bending force as a function of welding parameters (Current and Argon gas pressure). Also, the analysis of variance (ANOVA) was used to verify the adequacy of the resulted model statistically.

Effect of tungsten inert gas welding parameters on the performance of AISI 304 alloy steel using multi-response optimization technique

Abstract: The demand for improved integrity and reliability of weldment poses a huge challenge to manufacturing industries. In this work, Tungsten Inert Gas (TIG) welding technique was used in the welding of...

Robust regression analysis for the relationship between welding parameters and microhardness of 410 NiMo martensitic steel deposits on SAE 1020 steel

Abstract: The objective of this study was to analyze the flux-cored arc welding (FCAW) welding parameters and microhardness levels on surface quality of 410 NiMo martensitic stainless-steel coatings. The parameters of the FCAW process applied to the coating, included pulsation frequency, voltage, welding speed, average current and contact tip to work distance. The welding was carried out by the pulsed tubular wire process with pulsed current, constant voltage, Ar+2% O2 shielding gas and shortcircuit metal transfer for the deposition of EC410 NiMo Martensitic Steel Deposits alloy coatings on a SAE 1020 steel substrate. For the statistical analysis, the Taguchi experimental planning was applied to test the influence of the parameters of the FCAW process (average current, CTWD, pulsation current and welding speed) on the coating properties. The best configuration with respect to the increased microhardness of the fusion zone in the coating welding process is: Average Current 200 A; CTWD 40 mm; Pulsation Frequency 26.31 Hz and Welding Speed 300 mm min.. The lowest microhardness of the melting zone in the coating welding process is: Average Current 170 A; CTWD 30 mm; Pulsation Frequency 23.26 Hz and Welding Speed 400 mm min..