Optimization of TIG Welding of Al 65032 through Process Parameters using Taguchi Method
DOI:
https://doi.org/10.32628/IJSRMMEKeywords:
Aluminum Alloy, Tungsten Inert Gas, Ultimate Tensile Strength, Signal to Noise Ratio, Analysis of VarianceAbstract
High speed strength and corrosion resistance make Aluminum Alloy very prominent in Aerospace industry apart from automobile industry. In fact Aerospace is more predominant area, hence processing of this alloy more importance in aerospace. Aluminum in its pure form suffers from poor strength and other mechanical properties. Apart from automobile components i.e. aerospace the major structure of an aircraft is an Aluminum Alloy Al-65032.Today, Tungsten Inert Gas (TIG) Welding recommended welding for Aluminum alloys. Both are multi-objective and multi-factor metal fabrication techniques. The main objective of this work is to achieve the best mechanical properties respectively Ultimate Tensile Strength (UTS), Proof Stress, Percentage of Elongation, Impact Energy. To carry out research work for one factor at a time and trial and error method takes are more expensive and time consuming. There is every possibility due to time factor the researcher may sometimes give up the research. It is therefore the Taguchi approach and Design of Experiments (DOE) approaches have been chosen to carry out this work. In this work parametric design of Al-65032 is carried for optimization of mechanical properties. For accuracy and efficiency three levels are chosen with L9 as an Orthogonal Array (OA).This work deals with the identification of control parameters for TIG Welding and carried out experiments as L9 OA and finding out most Influencing parameters on mechanical properties by using Signal to Noise ratio(S/N) Analysis and to confirm with Analysis of Variance (ANOVA). Input parameters chosen are current, gas Pressure, Groove Angle and Preheating Temperature. The results found are current is most influencing parameter in TIG welding with and without heat. A good correlation is found for microstructures and mechanical properties with conditions to be gas pressure - 139 KPa, Current - 160 Amps, Groove Angle - 60° and Preheating temperature - 125 ° C.
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