INFLUENCING AND ANALYSIS OF TIG WELDING PROCESS ON MECHANICAL PROPERTIES OF EXTRUDED ALUMINUM PARTS

2017 ◽  
Vol 41 (4) ◽  
pp. 499-515
Author(s):  
Pushp Kumar Baghel ◽  
Doddalahally Shivalingaiah Nagesh
Keyword(s):  
Tensile Strength ◽  
Welding Speed ◽  
Influencing Factor ◽  
Welding Process ◽  
Pulse Frequency ◽  
Tig Welding ◽  
Peak Current ◽  
Base Current ◽  
Dissimilar Aluminum Alloys ◽  
Pulse On Time

Pulse TIG welding is widely used in critical engineering applications comprising of dissimilar aluminum alloys. This study investigates simultaneous effect of important welding process parameters (i.e peak current, base current, pulse frequency, pulse on time, welding speed) on weld quality (Ultimate tensile strength, yield strength, percentage elongation, micro-hardness, impact toughness) are evaluated. Desirable welding characteristics are obtained at optimum peak current of 196.81 Amp, base current of 133.0 Amp, pulse frequency of 6.04 Hz, pulse on time 49.9%, welding speed of 171.16mm/min. The welding speed is found to be significant influencing factor affecting the tensile strength and hardness of weld joint.

Pulsed TIG Welding of Al–SiC Composite: Welding Parameter Optimization

2019 ◽  
Author(s):  
P. Sivachidambaram ◽  
Raghuraman Srinivasan ◽  
Venkatraman Ramamoorthy
Keyword(s):  
Tensile Strength ◽  
Cooling Rate ◽  
Weld Zone ◽  
Pulse Frequency ◽  
Regression Equation ◽  
Welding Parameters ◽  
Pulsed Current ◽  
Base Current ◽  
Bending Load ◽  
Pulse On Time

Pulse on time, pulse frequency, peak current, and base current are the important parameters to be optimized in pulsed current tungsten inert gas (PCTIG) welding of Al–SiC metal matrix composite. Experiments were designed and conducted using the L9 orthogonal array technique. The regression equation was developed using Design Expert® statistical software package to predict the weld center’s micro hardness, yield strength, ultimate strength, elongation (%), bending load, weld depth, weld width, cooling rate, and peak temperature near the weld zone of Al-8% SiC composite, welded using PCTIG welding. Correlation coefficient shows 0.9 for all the mechanical properties. This showed that the regression equation and the mathematical model developed were adequate. Analysis of contour plot, interaction effect, signal-to-noise ratio, and mean response were developed, the influence of each pulsed current parameter was evaluated at each level, and the percentage of influence was calculated by using pulsed current parameters. Ultimate tensile strength and bending load values depend on the microstructure. When the cooling rate is higher, fine microstructures are observed due to grain refinement; higher tensile strength and bending load are also observed. Due to the decreased cooling rate, coarse microstructures are observed, which result in poor tensile strength and bending load. PCTIG welding parameters are responsible for the change in the cooling rate of the weld zone. The optimization of the PCTIG welding parameters shows that the peak current and base current should be 160 and 60 A, respectively. Pulse on time is recommended to be 50%–55% and pulse frequency to be 5 Hz.

scholarly journals Investigations on force generation and joint properties of dissimilar thickness friction stir corner welded AA 5086 alloy

2020 ◽  
Vol 40 (1) ◽  
pp. 67-74
Author(s):  
Manigandan Krishnan ◽  
Senthilkumar Subramaniam
Keyword(s):  
Tensile Strength ◽  
Friction Stir Welding ◽  
Welding Speed ◽  
Welding Process ◽  
Spindle Motor ◽  
Parent Material ◽  
Force Generation ◽  
Friction Stir ◽  
Current Consumption ◽  
Spindle Motor Current

The force generation, joint mechanical and metallurgical properties of friction stir corner welded non-heat treatable AA 5086 aluminum alloy are investigated in this paper. The friction stir welding process is carried out with the plate thicknesses of 6 mm and 4 mm. The welding speed, tool rotational speed and tool plunge depth were considered as the process parameters to conduct the welding experiments. The machine spindle motor current consumption and tool down force generation during friction stir welding were analyzed. The microstructures of various joint regions were observed. The tensile samples revealed the tensile strength of 197 MPa with tool rotational and welding speeds of 1,000 rev/min and 150 mm/min respectively, which is 78 % of parent material tensile strength. A maximum micro hardness of 98 HV was observed at thermomechanically joint affected zone, which was welded with tool rotation of 1,000 rev/min and welding speed of 190 mm/min.

scholarly journals Study of Laser Welding of HCT600X Dual Phase Steels

2014 ◽  
Vol 22 (1) ◽  
pp. 93-98
Author(s):  
Pavol Švec ◽  
Viliam Hrnčiar ◽  
Alexander Schrek
Keyword(s):  
Tensile Strength ◽  
Base Metal ◽  
Heat Affected Zone ◽  
Welding Speed ◽  
Welding Process ◽  
Beam Power ◽  
Welding Parameters ◽  
Dual Phase ◽  
Welded Steel ◽  
Steel Sheets

AbstractThe effects of beam power and welding speed on microstructure, microhardnes and tensile strength of HCT600X laser welded steel sheets were evaluated. The welding parameters influenced both the width and the microstructure of the fusion zone and heat affected zone. The welding process has no effect on tensile strength of joints which achieved the strength of base metal and all joints fractured in the base metal.

Enhancements on dissimilar friction stir welding between AZ31 and SPHC mild steel with Al-Mg as powder additives

2021 ◽  
pp. 1-22
Author(s):  
Mohd Ridha Muhamad ◽  
Sufian Raja ◽  
Mohd Fadzil Jamaludin ◽  
Farazila Yusof ◽  
Yoshiaki Morisada ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Friction Stir Welding ◽  
Mild Steel ◽  
Welding Speed ◽  
Welded Joint ◽  
Microstructural Analysis ◽  
Welding Process ◽  
Dissimilar Materials ◽  
Friction Stir ◽  
Welding Interface

Abstract Dissimilar materials joining between AZ31 magnesium alloy and SPHC mild steel with Al-Mg powder additives were successfully produced by friction stir welding process. Al-Mg powder additives were set in a gap between AZ31 and SPHC specimen's butt prior to welding. The experiments were performed for different weight percentages of Al-Mg powder additives at welding speeds of 25 mm/min, 50 mm/min and 100 mm/min with a constant tool rotational speed of 500 rpm. The effect of powder additives and welding speed on tensile strength, microhardness, characterization across welding interface and fracture morphology were investigated. Tensile test results showed significant enhancement of tensile strength of 150 MPa for 10% Al and Mg (balance) powder additives welded joint as compared to the tensile strength of 125 MPa obtained for welded joint without powder additives. The loss of aluminium in the alloy is compensated by Al-Mg powder addition during welding under a suitable heat input condition identified by varying welding speeds. Microstructural analysis revealed that the Al-Mg powder was well mixed and dispersed at the interface of the joint at a welding speed of 50 mm/min. Intermetallic compound detected in the welding interface contributed to the welding strength.

Tensile strength performance and optimization of Al 7068 using TIG welding process

2020 ◽  
Author(s):  
Shiva naga sathwik sridhara ◽  
Sree chandra siddhardha Allada ◽  
P.V. Sharmi Sai ◽  
Spandana Banala ◽  
Ram Subbiah ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Welding Process ◽  
Tig Welding ◽  
Strength Performance

Effect of Tool pin Profile and Axial Force on Tensile Behavior in Friction Stir Welding of Dissimilar Aluminum Alloys

2011 ◽  
Vol 415-417 ◽  
pp. 1140-1146 ◽  
Author(s):  
R. Palanivel ◽  
P. Koshy Mathews ◽  
M. Balakrishnan ◽  
I. Dinaharan ◽  
N. Murugan
Keyword(s):  
Tensile Strength ◽  
Friction Stir Welding ◽  
Axial Force ◽  
Aluminium Alloys ◽  
Welding Process ◽  
Fusion Welding ◽  
Friction Stir ◽  
Tool Pin Profile ◽  
Dissimilar Aluminum Alloys ◽  
Tool Pin

Aluminium alloys generally has low weldability by traditional fusion welding process. The development of the Friction Stir Welding (FSW) has provided an alternative improved way of producing aluminium joints, in a faster and reliable manner. FSW process has several advantages, in particular the possibility to weld dissimilar aluminium alloys. This study focuses on the behavior of tensile strength of dissimilar joints of AA6351-T6 alloy to AA5083-H111 alloy produced by friction stir welding was analysed. Five different tool pin profile such as Straight Square (SS), Tapered Square (TS), Straight Hexagon (SH), Straight Octagon (SO) and Tapered Octagon (TO) with three different axial force (1tonne, 1.5tonne, 2 tonne) have been used to weld the joints. The effect of pin profiles and axial force on tensile properties and material flow behaviour of the joint was analyzed and it was found that the straight square pin profile with 1.5 tonne produced better tensile strength then other tool pin profile and axial force.

Experimental Analysis on Mechanical Properties of Friction Stir Welding in Dissimilar Aluminum Alloys

2020 ◽  
pp. 64-68
Author(s):  
Anganan K ◽  
Narendran RJ ◽  
Naveen Prabhu N ◽  
Rahul Varma R ◽  
Sivasubramaniyam R
Keyword(s):  
Tensile Strength ◽  
Friction Stir Welding ◽  
Aluminum Alloys ◽  
Welding Speed ◽  
Rotational Speed ◽  
Copper Alloys ◽  
Welding Parameters ◽  
Tool Rotational Speed ◽  
Friction Stir ◽  
Dissimilar Aluminum Alloys

Friction stir welding (FSW) is an innovative solid state joining technique and has been employed in industries for joining aluminum, magnesium, zinc and copper alloys. The FSW process parameters such as tool, rotational speed, welding speed, axial force, etc play major role in deciding the weld quality. A mathematical modeling was developed based on experiments to predict the tensile strength of dissimilar FSW aluminum alloys. The maximum tensile strength of 210 MPa can be obtained at the tool rotational speed of 1100 rpm, welding speed of 35mm/min and an axial load of 7 kN is the Optimum welding parameters.

Development of Predictive Model for Quality Output of Welding Process of Steel NST 37-2 Using Response Surface Methodology

2018 ◽  
Vol 29 ◽  
pp. 12-18
Author(s):  
Lateef O. Mudashiru ◽  
Emmanuel O. Sangotayo ◽  
Samuel O. Alamu
Keyword(s):  
Tensile Strength ◽  
Welding Speed ◽  
Welding Process ◽  
Welding Current ◽  
Steel Sample ◽  
Quality Data ◽  
Optimum Process ◽  
Current Electrode ◽  
Welded Steel ◽  
Output Quality

The present study investigated the effect of operating parameters in modeling the output quality of welding process of steel sample. A three factor, three levels Box-Behnken Design (BBD) of RSM was applied to determine the effects of three independent variables (welding speed (A), welding current (B) and electrode potential (C)) on the tensile strength and to also develop a model for predicting the output quality. Data analysis shows that A, C, AB, BC, A2, B2and C2are the terms which significantly affected the ultimate tensile strength of the sample at 95% confidence level. The experimental values were very close to the predicted values and were not statistically different at p<0.05. The maximum tensile strength of 228 MPa was obtained at 250 A current, electrode diameter of 3.25 mm and 50 cm/min welding speed, respectively. The regression model obtained has provided a basis for selecting optimum process parameters for the improving output quality (tensile strength) of the welded steel sample.

Response surface approach to minimize the residual stresses in full penetration pulsed TIG weldments of Ti-5Al-2.5Sn alloy

2018 ◽  
Vol 233 (8) ◽  
pp. 2778-2793
Author(s):  
FN Khan ◽  
Massab Junaid ◽  
MN Baig ◽  
J Haider
Keyword(s):  
Residual Stress ◽  
Residual Stresses ◽  
Welding Speed ◽  
Tig Welding ◽  
Surface Approach ◽  
Box Behnken Design ◽  
Peak Current ◽  
Full Penetration ◽  
Maximum Residual Stress ◽  
Pulsed Tig Welding

Pulsation of current in tungsten inert gas (TIG) welding is employed to obtain good quality weldments. Peak current, background current, and welding speed in TIG welding are important parameters and their effects on the induced residual stresses are studied using Box–Behnken design methodology. The location of maximum residual stress was found to be close to the weld centerline. Longitudinal and transverse residual stresses at this location were found to be dependent on the pulsed TIG welding input parameters. However, using design of experiment approach, welding speed was found to have the most dominant influence on the stress values. In order to minimize the residual stresses, a reduction in heat input also led to reduction of weld pool penetration. The results of multiresponse optimization showed that in order to achieve a full penetration weldment, a minimum value of 235 MPa for longitudinal and 84 MPa for transverse residual stress will be attained. A weldment with these features can be obtained by using a high value of peak current and a high value of welding speed.

Experimental Analysis on Mechanical Properties of Friction Stir Welding in Dissimilar Aluminum Alloys

2020 ◽  
pp. 64-68
Author(s):  
K. Anganan ◽  
R.J . Narendran ◽  
N Naveen Prabhu ◽  
R Rahul Varma ◽  
R Sivasubramaniyam
Keyword(s):  
Tensile Strength ◽  
Friction Stir Welding ◽  
Aluminum Alloys ◽  
Welding Speed ◽  
Rotational Speed ◽  
Copper Alloys ◽  
Welding Parameters ◽  
Tool Rotational Speed ◽  
Friction Stir ◽  
Dissimilar Aluminum Alloys

Friction stir welding (FSW) is an innovative solid state joining technique and has been employed in industries for joining aluminum, magnesium, zinc and copper alloys. The FSW process parameters such as tool, rotational speed, welding speed, axial force, etc play major role in deciding the weld quality. A mathematical modeling was developed based on experiments to predict the tensile strength of dissimilar FSW aluminum alloys. The maximum tensile strength of 210 MPa can be obtained at the tool rotational speed of 1100 rpm, welding speed of 35mm/min and an axial load of 7 kN is the Optimum welding parameters.

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