scholarly journals Process Parameters Optimization for GMA Welding of AISI 1008 Steel Joints for Optimal Tensile Strength

2021 ◽  
Vol 31 (6) ◽  
pp. 349-354
Author(s):  
Cynthia S. Abima ◽  
Stephen A. Akinlabi ◽  
Nkosinathi Madushele ◽  
Esther T. Akinlabi
Keyword(s):  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Flow Rate ◽  
Gas Flow ◽  
Gma Welding ◽  
Welding Current ◽  
Parameters Optimization ◽  
Gas Flow Rate ◽  
Arc Voltage ◽  
Input Parameters

Parameters optimization has become a gateway to achieving quality welds with improved properties desirable for construction and industrial applications. The complex interaction of welding input parameters requires process optimization to achieve optimal responses (s). This study reports the optimization of input parameters for Gas Metal Arc Welding (GMAW) for optimal ultimate tensile strength in AISI 1008 steel joints. Three levels of arc voltage, welding current, and gas flow rate were selected as input parameters, while the targeted output response is the ultimate tensile strength. Taguchi’s method with an L-9 orthogonal matrix was adopted for the process optimization. The MINITAB 17 software was used to analyze the response through analysis of variance and signal-to-noise ratio. The result revealed that the parameter settings for optimal tensile strength for the GMA welding of 6 mm thick AISI 1008 steel joint are arc voltage set at 30 V, current at 180 A, and gas flow rate set at 17 L/mm. The analysis of variance showed that the arc voltage had the most significant influence on the ultimate tensile strength with a 39.76% contribution, followed by the gas flow rate with 31.15%, while the welding current had 6.28% contributions. The surface plots show that a lower-level voltage, higher-level welding current, and higher-level gas flow rate favoured maximum ultimate tensile strength.

scholarly journals Application of Taguchi technique to optimize the gma welding parameters and study of fracture mode characterization of AISI 304H welded joints

2018 ◽  
Vol 9 (1) ◽  
pp. 9-16
Author(s):  
S. A. Rizvi
Keyword(s):  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Process Parameters ◽  
Flow Rate ◽  
Fracture Mode ◽  
Welded Joints ◽  
Gas Flow ◽  
Welding Parameters ◽  
Taguchi Technique ◽  
Gas Flow Rate

This research article is focusing on the optimization of different welding process parameters which affect the weldability of stainless steel (AISI) 304H, Taguchi technique was used to optimize the welding parameters and the fracture mode characterization was studied. A number of experiments have been conducted. L9 orthogonal array (OA) (3×3) was applied. Analysis of variance ( ANOVA) and signal to noise ratio (SNR) was applied to determine the effect of different welding parameters such as welding current, wire feed speed and gas flow rate on mechanical, microstructure properties of SS304H. Ultimate tensile strength (UTS), toughness, microhardness (VHN), and mode of fracture was examined to determine weldability of AISI 304H and it was observed from results that welding voltage has major impact whereas gas flow rate has minor impact on ultimate tensile strength of the welded joints. Optimum process parameters were found to be 23 V, 350 IPM travel speed of wire and 15 l/min gas flow rate for tensile strength and mode of fracture was ductile fracture for tensile test specimen.

scholarly journals Optimization of TIG Welding Parameters for the 202 Stainless Steel Using NSGA-II

2020 ◽  
Vol 8 (4) ◽  
Author(s):  
Neeraj Sharma ◽  
◽  
Wathiq Sleam Abduallah ◽  
Manish Garg ◽  
Rahul Dev Gupta ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Flow Rate ◽  
Gas Flow ◽  
Welding Process ◽  
Welding Current ◽  
Welding Parameters ◽  
Shielding Gas ◽  
Gas Flow Rate ◽  
Electrode Diameter ◽  
Weld Region

Tungsten Inert Gas welding is a fusion welding process having very wide industrial applicability. In the present study, an attempt has been made to optimize the input process variables (electrode diameter, shielding gas, gas flow rate, welding current, and groove angle) that affect the output responses, i.e., hardness and tensile strength at weld center of the weld metal SS202. The hardness is measured using Vicker hardness method; however, tensile strength is evaluated by performing tensile test on welded specimens. Taguchi based design of experiments was used for experimental planning, and the results were studied using analysis of variance. The results show that, for tensile strength of the welded specimens, welding current and electrode diameter are the two most significant factors with P values of 0.002 and 0.030 for mean analysis, whereas higher tensile strength was observed when the electrode diameter used was 1.5 mm, shielding gas used was helium, gas flow rate was 15 L/min, welding current was 240A, and a groove angle of 60o was used. Welding current was found to be the most significant factor with a P value of 0.009 leading to a change in hardness at weld region. The hardness at weld region tends to decrease significantly with the increase in welding current from 160-240A. The different shielding gases and groove angle do not show any significant effect on tensile strength and hardness at weld center. These response variables were evaluated at 95% confidence interval, and the confirmation test was performed on suggested optimal process variable. The obtained results were compared with estimated mean value, which were lying within ±5%.

Parametric Optimization of Dissimilar TIG Welding of AISI 304L and 430 Steel Using Taguchi Analysis

2019 ◽  
Vol 969 ◽  
pp. 625-630
Author(s):  
A. Sivanantham ◽  
S. Manivannan ◽  
S.P. Kumaresh Babu
Keyword(s):  
Tensile Strength ◽  
Stainless Steel ◽  
Flow Rate ◽  
Welding Speed ◽  
Gas Flow ◽  
Welding Current ◽  
Dissimilar Welding ◽  
Shielding Gas ◽  
Gas Flow Rate ◽  
Aisi 304L

Dissimilar welding of 3mm thickness of AISI 304L austenitic stainless steel plate and AISI 430 ferritic stainless steel plates were performed by Tungsten Inert Gas welding without any filler material by using argon as shielding gas. Welding is carried out according to set of combinations of welding parameters such as welding current (levels of 135,140,145 Ampere), welding speed (levels of 105, 110, 115 mm/min) and shielding gas flow rate (of levels 5,10,15 Litre/min) obtained through Taguchi L9 orthogonal approach for maximizing the ultimate tensile strength by using MiniTab software . Radiography test was performed to know the soundness of the welds. Tensile specimens are fabricated as per ASTM E8 standard for tensile testing. Microstructural observations of the weld are performed. Correlations have been obtained to know the effect of welding speed, welding current and shielding gas flow rate on tensile strength and an optimum level of parameter is obtained at welding current of 145 Ampere, welding speed of 115 mm/min and shielding gas flow rate of 5 Litre/min.

Optimization of Welding Parameters and Microstructure and Fracture Mode Characterization of GMA Welding by Using Taguchi Method on SS304H Austenitic Steel

2020 ◽  
Vol 22 (4) ◽  
pp. 1121-1132
Author(s):  
Saadat Ali Rizvi ◽  
Wajahat Ali
Keyword(s):  
Tensile Strength ◽  
Flow Rate ◽  
Fracture Mode ◽  
Gas Flow ◽  
Gma Welding ◽  
Welding Parameters ◽  
Optimum Process ◽  
Feed Speed ◽  
Gas Flow Rate ◽  
Tensile Test Specimen

AbstractThis study is centre on optimizing different welding parameters which affect the weldability of SS304H, Taguchi technique was employed to optimize the welding parameters and fracture mode characterization was studied. A number of experiments have been conducted. L9 orthogonal array (3×3) applied for it. Analysis of variance (ANOVA) and signal to noise ratio (SNR), a statistical technique was applied to determine the effect of different welding parameters such as welding current, wire feed speed and gas flow rate on weldability of SS304H. Tensile strength, toughness, micro hardness and mode of fracture was examined to determine weldability of SS304H and it was observed from result that welding voltage have major impact whereas gas flow rate has minour impact on ultimate tensile strength of the welded joints and optimum process parameters were found to be 23 V, 350 IPM travel speed of wire and 15 l/min gas flow rate for tensile strength and mode of fracture was ductile fracture for tensile test specimen.

scholarly journals Optimization and Prediction of Ultimate Tensile Strength in Metal Active Gas Welding

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Anusit Ampaiboon ◽  
On-Uma Lasunon ◽  
Bopit Bubphachot
Keyword(s):  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Regression Model ◽  
Flow Rate ◽  
Welding Speed ◽  
Feed Rate ◽  
Gas Flow ◽  
Welding Parameters ◽  
Gas Flow Rate ◽  
Wire Feed

We investigated the effect of welding parameters on ultimate tensile strength of structural steel, ST37-2, welded by Metal Active Gas welding. A fractional factorial design was used for determining the significance of six parameters: wire feed rate, welding voltage, welding speed, travel angle, tip-to-work distance, and shielded gas flow rate. A regression model to predict ultimate tensile strength was developed. Finally, we verified optimization of the process parameters experimentally. We achieved an optimum tensile strength (558 MPa) and wire feed rate, 19 m/min, had the greatest effect, followed by tip-to-work distance, 7 mm, welding speed, 200 mm/min, welding voltage, 30 V, and travel angle, 60°. Shield gas flow rate, 10 L/min, was slightly better but had little effect in the 10–20 L/min range. Tests showed that our regression model was able to predict the ultimate tensile strength within 4%.

scholarly journals The Effect of Process Parameters on the Microstructure and Mechanical Properties of AW5083 Aluminum Laser Weld Joints

Metals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1443 ◽  
Author(s):  
Maroš Vyskoč ◽  
Miroslav Sahul ◽  
Mária Dománková ◽  
Peter Jurči ◽  
Martin Sahul ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Process Parameters ◽  
Flow Rate ◽  
Weld Joint ◽  
Gas Flow ◽  
Filler Wire ◽  
Shielding Gas ◽  
Gas Flow Rate ◽  
Weld Joints

In this article, the effect of process parameters on the microstructure and mechanical properties of AW5083 aluminum alloy weld joints welded by a disk laser were studied. Butt welds were produced using 5087 (AlMg4.5MnZr) filler wire, with a diameter of 1.2 mm, and were protected from the ambient atmosphere by a mixture of argon and 30 vol.% of helium (Aluline He30). The widest weld joint (4.69 mm) and the highest tensile strength (309 MPa) were observed when a 30 L/min shielding gas flow rate was used. Conversely, the narrowest weld joint (4.15 mm) and the lowest tensile strength (160 MPa) were found when no shielding gas was used. The lowest average microhardness (55.4 HV0.1) was recorded when a 30 L/min shielding gas flow rate was used. The highest average microhardness (63.9 HV0.1) was observed when no shielding gas was used. In addition to the intermetallic compounds, β-Al3Mg2 and γ-Al12Mg17, in the inter-dendritic areas of the fusion zone (FZ), Al49Mg32, which has an irregular shape, was recorded. The application of the filler wire, which contains zirconium, resulted in grain refinement in the fusion zone. The protected weld joint was characterized by a ductile fracture in the base material (BM). A brittle fracture of the unshielded weld joint was caused by the presence of Al2O3 particles. The research results show that we achieved the optimal welding parameters, because no cracks and pores were present in the shielded weld metal (WM).

An attempt to develop relations for the arc voltage in relation to the arc current and gas flow rate

Vacuum ◽  
2000 ◽  
Vol 59 (1) ◽  
pp. 118-125 ◽  
Author(s):  
R. Ramasamy ◽  
V. Selvarajan ◽  
K. Perumal ◽  
G. Shanmugavelayutham
Keyword(s):  
Flow Rate ◽  
Gas Flow ◽  
Gas Flow Rate ◽  
Arc Voltage ◽  
Arc Current

Gas Metal Arc Welded (GMAW) Joint Strength Comparison of Aluminum Sheet (5754) and Exturded (6063) Alloys

2007 ◽  
Author(s):  
Ramakrishna Koganti ◽  
Armando Joaquin ◽  
Matthew Zaluzec ◽  
Chris Karas
Keyword(s):  
Flow Rate ◽  
Gas Flow ◽  
Gma Welding ◽  
Surface Condition ◽  
Power Input ◽  
Pulse Frequency ◽  
Weld Penetration ◽  
Phase 2 ◽  
Lap Joint ◽  
Gas Flow Rate

The development of lightweight vehicles, in particular aluminum intensive vehicles, require significant manufacturing process development for joining and assembling aluminum structures. Currently, 5xxx and 6xxx aluminum alloys are being used in various structural applications in a number of lightweight vehicles worldwide. Various joining methods, such as GMAW (it is also referred as Metal Inert Gas Welding), Laser and adhesive bonding have been investigated as technology enablers for high volume joining of 5xxx, and 6xxx series alloys. In this study, GMA welding was used to join 5754 non-heat-treatable alloy sheet and 6063-T6 heat treatable extrusion products. The objective of this study was to develop optimum weld process parameters for non-heat-treatable 5754 aluminum and heat treatble 6063-T6 alloys. For both the alloys, the lap joint configuration was used. The GMA welding equipment used in this study was an OTC/Daihen CPD-350 welding systems and DR-4000 pulse power supply. In the first phase of the experiments for 5754 aluminum alloy, the factors selected for the experiment were power input (torch speed, voltage, current, wire feed), pulse frequency, gas flow rate and surface condition. A full factorial design of experiment (DOE) was conducted (DOE #1) to understand the main and interaction effects on lap joint failure and weld penetration. Based on the results from phase 1 results, surface condition was eliminated in the phase 2 experiments. In phase 2 experiments for heat treatable alloys 6063 T6, the factors selected were power input (torch speed, voltage, current, wire feed), pulse frequency, gas flow rate, torch angle, and arc intensity. A partial factorial DOE was conducted (DOE # 2) primarily to understand the main effects and some two level interaction effects. For both phase 1 (non-heat treatable alloy 5754) and phase 2 (heat treatable alloy 6063-T6) experiments, the factors influence on the mechanical properties of the lap joint, metallurgy (weld penetration) and micro hardness were evaluated. Post weld analysis indicates for non heat treatable alloy 5754, power input and gas flow rate are the two signficant factors (statistically) based on lap shear load to failure and weld penentration data. For heat treatable alloy 6063, power input was the significant factor on joint load to failure, however, for weld penetration, power input, pulse frequency and gas flow rate were the significant factors. Based on the joint strength and weld penetration, optimum weld process factors were determined for both non-heat treatable alloy 5754 and heat treatble alloy 6063 T6.

Parameters optimization of MAG welding for enhancing the mechanical properties and buckling behaviour of welded steel

2020 ◽  
Vol 1 (99) ◽  
pp. 5-13
Author(s):  
A.H. Alwan ◽  
N.Y. Mahmood
Keyword(s):  
Tensile Strength ◽  
Flow Rate ◽  
Gas Flow ◽  
Buckling Load ◽  
Mag Welding ◽  
Welding Parameters ◽  
Gas Flow Rate ◽  
Critical Buckling Load ◽  
Feeding Speed ◽  
Wire Feeding

Purpose: The influence of metal active gas welding variables, including current, wire feeding speed and gas flow rate on the ultimate tensile strength and critical buckling load of steel (St.24) and the optimized welding conditions were discussed. Design/methodology/approach: The experimental steps are firstly designing the experiments, secondly conducting the mechanical tests, thirdly analysing the results through Minitab 16 and finally determining the optimum welding parameters. Confirmation tests of the optimized variables were validated. Findings: ANOVA approach manifested that the significant effect of welding variable on the tensile strength was the gas flow rate, while the current was on the critical buckling load. The results are confirmed and given the optimum values. Research limitations/implications: The influence of MAG welding variables (current, wire feeding speed and gas flow rate) on the tensile and buckling strengths of steel will be investigated in order to avoid the failure of many welded assemblies in the structures due to the buckling, in addition to reduce the requirement of long time and high cost to produce such assemblies. Therefore, it is necessary to find a solution to encounter the difficulties in their welding process. Practical implications: The major challenge was how to reduce the time and cost beside gaining the optimum properties through the designed experiments. Originality/value: The results may be helpful to design any welded joints in machine frames, structural steel connections and crane structures at the optimum condition.

scholarly journals Welding Current and Shielding Gas Flow Rate Effect to The Intermetalic Layer Formation of Tungsten Inert Gas (Tig) on Dissimilar Metals Weld Joints Between Galvanized Steel and Aluminium Aa 5052 By Using Al-Si 4043 Filler

2017 ◽  
Vol 16 (1) ◽  
Author(s):  
Gilang Sigit Saputro ◽  
Triyono . ◽  
Nurul Muhayat
Keyword(s):  
Flow Rate ◽  
Gas Flow ◽  
Intermetallic Layer ◽  
Welding Current ◽  
Galvanized Steel ◽  
Inert Gas ◽  
Welding Parameters ◽  
Dissimilar Metals ◽  
Shielding Gas ◽  
Gas Flow Rate

Tungsten Inert Gas welding of galvanized steel-aluminium useful for weight reduction, improve perform and reduce cost production. The effect of welding parameters, welding current and shielding gas flow rate on the intermetallic formation and hardness of dissimilar metals weld joint between galvanized steel and aluminium by using AA 5052 filler was determined. In this research, welding speed was consistent kept. The welding parameters were obtained by using welding currents of 70, 80 and 90 A, shielding gas flow rate of 10, 12 and 14 litre/min. The intermetallic layer thickness increased by welding currents of 70 A to 80 A, but then it dropped on 90 A. The higher of a shielding gas flow rate, the lower the thickness of the intermetallic layer. The higher of a welding current, the lower the hardness of weld. The higher of a shielding gas flow rate, the greater the hardness of weld. As a result,the maximum hardness by current variation of 70 A and a shielding gas flow rate of 14 Litre/min was 100.9 HVN.

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