Integration of RSM with Grey based Taguchi Method for optimization of pulsed TIG welding process parameters

2019 ◽  
Vol 18 ◽  
pp. 5114-5127
Author(s):  
Asif Ahmad ◽  
Shahnawaj Alam
Keyword(s):  
Taguchi Method ◽  
Process Parameters ◽  
Welding Process ◽  
Tig Welding ◽  
Pulsed Tig Welding

scholarly journals Weldability Investigation and Optimization of Process Variables for TIG-Welded Aluminium Alloy (AA 8006)

2021 ◽  
Vol 2021 ◽  
pp. 1-17
Author(s):  
T. Sathish ◽  
S. Tharmalingam ◽  
V. Mohanavel ◽  
K. S. Ashraff Ali ◽  
Alagar Karthick ◽  
...  
Keyword(s):  
Experimental Design ◽  
Aluminium Alloy ◽  
Process Parameters ◽  
Surface Hardness ◽  
Weight Ratio ◽  
Welding Process ◽  
Tig Welding ◽  
Low Weight ◽  
Superior Corrosion Resistance ◽  
Welding Processes

Aluminium and its alloys play a significant role in engineering material applications due to its low weight ratio and superior corrosion resistance. The welding of aluminium alloy is challenging for the normal conventional arc welding processes. This research tries to resolve those issues by the Tungsten Inert Gas welding process. The TIG welding method is an easy, friendly process to perform welding. The widely applicable wrought aluminium AA8006 alloy, which was not considered for TIG welding in earlier studies, is considered in this investigation. For optimizing the number of experiments, the Taguchi experimental design of L9 orthogonal array type experimental design/plan was employed by considering major influencing process parameters like welding speed, base current, and peak current at three levels. The welded samples are included to investigate mechanical characterizations like surface hardness and strengths for standing tensile and impact loading. The results of the investigation on mechanical characterization of permanent joint of aluminium AA8006 alloy TIG welding were statistically analyzed and discussed. The 3D profilometric images of tensile-tested specimens were investigated, and they suggested optimized process parameters based on the result investigations.

Optimization of A-TIG welding process parameters for RAFM steel using response surface methodology

2015 ◽  
Vol 232 (2) ◽  
pp. 121-136 ◽  
Author(s):  
P Vasantharaja ◽  
M Vasudevan
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Process Parameters ◽  
Welding Process ◽  
Tig Welding ◽  
Depth Of Penetration ◽  
Bead Width ◽  
A Tig Welding ◽  
Input Variables ◽  
Haz Width

In the present work, the optimization of Activated TIG (A-TIG) welding process parameters to achieve the desired weld bead shape parameters such as depth of penetration, bead width, and heat-affected zone (HAZ) width have been carried out using response surface methodology (RSM). The main problem faced in fabrication of weld joints is the selection of optimum combination of input variables for achieving required quality of welds. This problem can be solved by development of mathematical model and execution of experiments by RSM. Central composite design of RSM has been used to generate the design matrix for generating data on the influence of A-TIG welding process parameters. The input variables considered were welding current, torch speed, electrode tip angle, and arc gap. The response variables considered were depth of penetration, bead width and HAZ width. A second-order response surface model is developed for predicting the response for the set of given input process parameters. Then, numerical and graphical optimization is performed using RSM to obtain the desired depth of penetration, bead width, and target HAZ width using desirability approach.

scholarly journals Analysis of Mechanical, Microstructural Properties and Weld Morphology of A-TIG Welded AH-36 Marine-Grade Steels with Oxide and Duplex Flux Coating

2021 ◽  
Vol 18 (3) ◽  
pp. 9101-9112
Author(s):  
Vijaya Kumar K. ◽  
N. Ramanaiah ◽  
N. Bhargava Rama Mohan Rao
Keyword(s):  
Mechanical Properties ◽  
Process Parameters ◽  
Heat Input ◽  
Welding Process ◽  
Marangoni Effect ◽  
Tig Welding ◽  
Inert Gas ◽  
Width Ratio ◽  
Tungsten Inert Gas Welding ◽  
Welding Processes

The current study investigates the metallurgical, mechanical properties and weld morphology of AH36 marine grade steel (with a thickness of 8 mm) by activated-tungsten inert gas  (A-TIG) butt joints, with the application of different fluxes (MoO3, V2O5, and duplex of MoO3 and V2O5) at various process parameters. The welding speed was kept constant at 120 mm/min, and current varied from 160 A to 220 A uniformly to optimise process parameters to achieve desired mechanical properties, weld morphology, and lowest possible heat input. The study also focused on comparing tensile strength, impact strength, and microhardness, heat input during welding, weld bead depth and width between conventional TIG welding and activated flux TIG welding processes at various operation parameters. Tensile results reported that fracture occurs at the base region in ordinary TIG welding and the activated tungsten inert gas welding process. It was noticed that a higher depth to width ratio attained MoO3 and V2O5 duplex flux coated weldments. There is evidence that the depth of weld joints is enhanced because of stable arc, Marangoni effect, and arc constriction. Microhardness results reported that the fusion zone has a higher microhardness in the activated tungsten inert gas welding than the ordinary TIG welding. It was concluded that out of all fluxes, MoO3 and V2O5 duplex flux coating produce better butt welds of AH36 steel.

An Approach of Weighted Principal Component Analysis Based Taguchi Method for Parametric Optimization of Submerged Arc Welding

2012 ◽  
Vol 488-489 ◽  
pp. 866-870
Author(s):  
J. Deb Barma ◽  
Mitul B. Shil ◽  
P.K. Dan ◽  
A. Bandyopadhyay
Keyword(s):  
Taguchi Method ◽  
Process Parameters ◽  
Welding Process ◽  
Principal Component ◽  
Welding Parameters ◽  
Quality Level ◽  
System Specification ◽  
Weighted Principal Component ◽  
Joint Quality

Quality is the collection of features and characteristics of a product that contribute to its ability to meet given requirements. The quality of a weld joint is directly influenced by the welding parameters during the welding process. Often, a common problem that has been faced by the manufacturer is the control of the process parameters to obtain a good welded joint. Quality level is denoted as the probability of conformance and is a function of system variables and system specification. The present work is aimed to improve the quality of the weldment in SAW using Weighted Principal Component based Taguchi method. Three process parameters such as voltage, carriage speed and stand of distance are identified to carry out the study. Mechanical properties such as tensile strength and hardness are considered to be the response parameters in the present study.

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