Effect of welding parameters on mechanical properties and optimization of pulsed TIG welding of Al-Mg-Si alloy

2008 ◽  
Vol 42 (1-2) ◽  
pp. 118-125 ◽  
Author(s):  
A. Kumar ◽  
S. Sundarrajan
Keyword(s):  
Mechanical Properties ◽  
Tig Welding ◽  
Welding Parameters ◽  
Pulsed Tig Welding

Evaluation of Parameters Effect on Microstructure and Mechanical Properties in TIG Welding of A105 to A106 Steels

2016 ◽  
Vol 879 ◽  
pp. 2234-2238
Author(s):  
Afshin Yousefi ◽  
Davood Ghasemi ◽  
Goroh Itoh
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Slag Inclusion ◽  
Tig Welding ◽  
Current Intensity ◽  
Welding Parameters ◽  
Test Results ◽  
Average Hardness ◽  
Evaluation Of Parameters ◽  
Number Of Passes

Welding parameters such as current intensity, voltage, number of passes can affect the mechanical properties of the weld. In this paper the effect of these parameters on structure and mechanical properties of welded A105 and A106 steels has been evaluated. According to the mechanical and microstructure test results, increasing in welding pass number causes reduction in grain size and increasing in average hardness of HAZ. Also inter-pass slag inclusion defect occurred in high number of passes.

scholarly journals Design Optimization of TIG Welding Process for AISI 316L Stainless Steel

2019 ◽  
Vol 8 (2) ◽  
pp. 5348-5354
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Response Surface ◽  
316L Stainless Steel ◽  
Tig Welding ◽  
Welding Parameters ◽  
Aisi 316L ◽  
Aisi 316L Stainless Steel ◽  
Input Parameters ◽  
Desirability Function Analysis

AISI 316L stainless steel materials of thickness 3 mm have been united by tungsten inert gas (TIG) welding in square butt joint configuration as per Box-Behnken design technique of response surface methodology (RSM) to indentify the effects of input parameters on the quality of the TIG welded joints. The output responses have been measured after experimentation. Mathematical correlation between input parameters and output responses has been developed using RSM. The factors which influences on responses have been analyzed by generating the response surface and contour plots. Desirability function analysis (DFA) is employed for finding optimum parametric setting to achieve the most favourable mechanical properties. Microstructures of welded samples are also investigated to correlate the metallurgical-mechanical characteristics of the welded specimens. The result indicates that at the intermediate values of welding parameters create fine grain structure and superior mechanical properties.

Prediction of Weld Strength of PC-TIG Welded Al-8% SiC Metal Matrix Composite – An Empirical Model (EM) Approach

2015 ◽  
Vol 813-814 ◽  
pp. 467-473
Author(s):  
Sivachidambaram Pichumani ◽  
Krishnamoorthy Balachandar
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Yield Strength ◽  
Empirical Model ◽  
Metal Matrix ◽  
Tig Welding ◽  
Weld Strength ◽  
Welding Parameters ◽  
Pulsed Current ◽  
Bend Strength

This work is focused on the development of empirical model to predict the mechanical properties of welded Al-SiC metal matrix composites. Autogenous pulsed current-Tungsten inert gas (PC-TIG) welding was performed on 5mm thick Al-8%SiC composite plates. Regression equations were developed to predict the tensile strength, yield strength, percentage of elongation and bend strength of pulsed current TIG weld Al-SiC composite by varying weld parameters such as peak current, base current, pulse on time and pulse frequency. The effect of each pulsed current TIG welding parameters and interaction between two more parameters on the ultimate tensile strength, yield strength, percentage of elongation and bend strength were studied for clear understanding of PCTIG welding parameters. Improved mechanical properties viz. 136 MPa tensile strength, 117 MPa yield strength with 15% elongation were achieved using optimal PCTIG welding parameters. The predicted values were experimentally verified for consistency and validation. This study also resulted in understanding the significant factors which were responsible for improved weld strength of the chosen candidate material.

Effects of bottom plate in friction stir welding of AA6061-T6

2020 ◽  
Vol 118 (1) ◽  
pp. 108
Author(s):  
M.A. Vinayagamoorthi ◽  
M. Prince ◽  
S. Balasubramanian
Keyword(s):  
Mechanical Properties ◽  
Axial Load ◽  
Weld Zone ◽  
Welding Process ◽  
Bottom Plate ◽  
Welding Parameters ◽  
Nugget Zone ◽  
Friction Stir ◽  
Weld Joints ◽  
Fine Grain

The effects of 40 mm width bottom plates on the microstructural modifications and the mechanical properties of a 6 mm thick FSW AA6061-T6 joint have been investigated. The bottom plates are placed partially at the weld zone to absorb and dissipate heat during the welding process. An axial load of 5 to 7 kN, a rotational speed of 500 rpm, and a welding speed of 50 mm/min are employed as welding parameters. The size of the nugget zone (NZ) and heat-affected zone (HAZ) in the weld joints obtained from AISI 1040 steel bottom plate is more significant than that of weld joints obtained using copper bottom plate due to lower thermal conductivity of steel. Also, the weld joints obtained using copper bottom plate have fine grain microstructure due to the dynamic recrystallization. The friction stir welded joints obtained with copper bottom plate have exhibited higher ductility of 8.9% and higher tensile strength of 172 MPa as compared to the joints obtained using a steel bottom plate.

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