scholarly journals Analysis of Welding Position and Current on Mechanical Properties of A36 Steel using Shield Metal Arc Welding

2021 ◽  
Vol 2117 (1) ◽  
pp. 012001
Author(s):  
F Vietanti ◽  
A F Rajan ◽  
A A Arifin ◽  
D H Feryanto ◽  
Suheni ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Base Material ◽  
Welding Current ◽  
Butt Joint ◽  
A Value ◽  
Metal Arc Welding ◽  
Strict Condition ◽  
Joint Connection ◽  
A36 Steel ◽  
Welding Position

Abstract Welding is an assembly process that is most often used in the world of construction today. Welding is often used for repairing and maintenance of all tools made of metal, both as a process for filling cracks, temporary joining, or cutting metal parts. This study aims to determine the effect of welding current and position on the tensile strength and Vickers hardness (HV). This study uses ASTM A36 steel plate as base material. The variation of welding currents used are 90A, 110A, and 130A combine with variations in positions 1G, 2G, and 3G. The electrode used in this study is E6013 electrode with a diameter of 3.2 with a butt joint connection. All of processes are performed in room temperature with a strict condition. The results are as follow, the highest Ultimate Tensile Strength is obtained at 90A current and 3G position with a value of 471.93 MPa. For the highest hardness in the Vickers test, it is also obtained at 90A current and 3G position with a value of 242.20 Kgf/mm2.

Experimental Study on Tensile Strength of Butt Joints for Mild Steel with Thickness 6mm Using Gas Metal Arc Welding (GMAW)

2017 ◽  
Vol 740 ◽  
pp. 155-160 ◽  
Author(s):  
Z.A. Zakaria ◽  
K.N.M. Hasan ◽  
M.F.A. Razak ◽  
Amirrudin Yaacob ◽  
A.R. Othman
Keyword(s):  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Heat Affected Zone ◽  
Arc Welding ◽  
Gas Metal Arc Welding ◽  
Welding Current ◽  
Welding Parameter ◽  
Welding Parameters ◽  
Low Carbon ◽  
Metal Arc Welding

In this study, the effects of various welding parameters on welding strength in low carbon steel JIS G 3101 SS400, welded by gas metal arc welding were investigated. Welding current, arc voltage and travel speed are the variable parameters were studied in this study. The ultimate tensile strength, hardness and heat affected zone were measured for each specimen after the welding operations, and the effects of these parameters on strength were examined. Then, the relationship between welding parameter and ultimate tensile strength, hardness and heat affected zone were determined. Based on the finding, the best parameter is formulated and used to calculate the heat input.

Effect of GMAW Shielding Gas on Tensile Strength of Dissimilar SS400 Carbon Steel and SUS304 Stainless Steel Butt Joint

2019 ◽  
Vol 950 ◽  
pp. 70-74 ◽  
Author(s):  
Kittipong Kimapong ◽  
Surat Triwanapong
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Weld Metal ◽  
Gas Metal Arc Welding ◽  
Research Work ◽  
Butt Joint ◽  
Shielding Gas ◽  
Mixed Gas ◽  
Metal Arc Welding ◽  
Ductile Behavior

An optimization of a gas metal arc welding (GMAW) process parameter is currently investigated for producing a dissimilar SS400/SUS304 steels joint because a requirement of a sound joint with higher tensile strength. A gas shielding type is one of the important parameter because it could produce a good arc, protect the weld pool from atmosphere and so on. So, this research work aimed to study an effect of the shielding gas type on the mechanical properties of the dissimilar SS400/SUS304 steels butt joint. A relation between microstructure and the mechanical properties of the butt joint was also investigated and compared. The summarized results are as follows. The optimized shielding gas that produced a maximum tensile stregnth of 550 MPa was 95%Ar+5%N2. Nitrogen gas that mixed to the shielding gas affected to decrease dendrite size and to increase the hardness and tensile strength of weld metal. Fracture characteristic of the joint produced by N2 mixed gas showed a larger deformation at the location that was closely the fracture location that implied a ductile behavior. The dissimilar SUS304/SS400 metals joint showed a low hardness base metal, a higher hardness interface and a highest hardness weld metal.

scholarly journals Robust Parameter Design of Shielded Metal Arc Welding (SMAW) for Optimum Tensile Strength

2021 ◽  
Vol 5 (2) ◽  
pp. 73
Author(s):  
Moh. Dedy Indra Setiawan ◽  
Yanuar Rohmat Aji Pradana ◽  
Suprayitno Suprayitno
Keyword(s):  
Tensile Strength ◽  
Arc Welding ◽  
Welding Process ◽  
Welding Current ◽  
Parameter Design ◽  
Robust Parameter Design ◽  
Shielded Metal Arc Welding ◽  
Metal Arc Welding ◽  
Robust Parameter ◽  
Noise Factors

Shielded Metal Arc Welding (SMAW), an arc welding process, is widely used in applications. In practice, SMAW is widely applied to the welding process on hollow square pipe. Performance expected from this welding is the tensile strength of weld joint. The tensile strength is influenced by parameters process which have possibility for an optimization process to become ‘robust’. Robust is a design which less sensitive to the effect of uncertain quantities or noise factors. Taguchi method is the most efficient optimization method which accommodates the noise factors effect and requires less experiment. This study is focusing on optimizing the welding process on hollow square pipe. Parameters process such as welding current (I), electrode angle (θ), root gap (d) and electrode type (E) are adopted as parameters design. Taguchi method are chosen as a strategy and L9 fractional orthogonal array are chosen as the design experiment, which only 9 experiment samples needed from 81 experiments that should have been carried out for full factorial design. The objectivity is to maximize the tensile strength of weld joint. Three replications of L9 fractional orthogonal array Taguchi had been performed to generate the tensile strength and estimates the fluctuation of the output caused by noise factors. This study found that the welding current of 100A (I), electrode angle (θ) of 90°, root gap (d) of 2 mm, and electrode type (E) of E7018 produce the optimum results. Tensile strength improved from this robust parameter design is about 98.39 MPa based on initial parameter design.

scholarly journals The Study of Physical Properties and Analysis of Welding Parameters of A Butt Joint of C45 Steel in MIG Welding

2020 ◽  
pp. 231-237
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Welding Current ◽  
Butt Joint ◽  
Medium Carbon Steel ◽  
Welding Parameters ◽  
Dog Bone ◽  
Hardness Tests ◽  
Current Voltage ◽  
Input Parameters

This project shows the effect of welding variables on the mechanical properties of C45 steel. This medium carbon steel plate of 10 mm thickness welded using the Metal Inert Gas Welding. Welding current, voltage, root gap are the welding parameters. The hardness and tensile strength of weld specimen are investigated in this study. The results showed that the selected welding parameters had significant effects on the mechanical properties of the welded samples. The welded samples were cut and machined to standard configurations (dog bone sample) for tensile and hardness tests. The selected three input parameters were varied at three levels on the analogy; nine experiments were performed based on L9 array of Taguchi’s methodology, which consist three input parameters. Analysis of variance (ANOVA) was employed to find the levels of significance of input parameters. Root gap has greatest effect on tensile strength followed by welding current and voltage. Voltage has the greatest effect on hardness followed by root gap and welding current. The relative studies of machining performances on the basis of metallurgical properties are properties are prepared by the help of statistical tools, i.e. L9 Orthogonal Array, ANOVA etc.

Optimization of GMAW Parameters to Improve the Mechanical Properties

2015 ◽  
Vol 813-814 ◽  
pp. 456-461
Author(s):  
S. Saravanan ◽  
Pandian Pitchipoo
Keyword(s):  
Process Parameters ◽  
Welded Joints ◽  
Gas Flow ◽  
Gas Metal Arc Welding ◽  
Base Material ◽  
Welding Current ◽  
Welding Parameters ◽  
Input Process ◽  
Metal Arc Welding ◽  
Grey Relational

In this paper, multi objective optimization of Gas Metal Arc Welding GMAW) parameters are carried out to yield good mechanical strength in welded joints. Most of the failures are occurred on the welded elements due to the setting of improper welding parameters. The strength of welded joints in GMAW depends on several input process parameters such as welding current, welding voltage, gas flow rate, torch angle, welding speed, wire size and electrode feed rate. Wrong selection of these process parameters will lead to bad quality welds. So there is a need to control the process parameters to obtain good quality welded joints. For getting the better values of these parameters, it needs to conduct experiments by varying the input process parameters that are affecting the strength of the welded joints. In this work nine experimental runs based on an L9 orthogonal array of Taguchi method are performed to optimize the strength of the welded joint. To achieve this Grey Relational Analysis (GRA) is used. In this work Aluminum6063 material is used as base material.

Effect of Welding Consumables on Dissimilar AISI304/AISI1015 Steels Butt Joint Properties

2018 ◽  
Vol 777 ◽  
pp. 344-349
Author(s):  
Surat Triwanapong ◽  
Kittipong Kimapong
Keyword(s):  
Impact Strength ◽  
Weld Metal ◽  
Welding Current ◽  
Interface Structure ◽  
Butt Joint ◽  
Shielded Metal Arc Welding ◽  
Metal Arc Welding ◽  
Joint Properties ◽  
Covered Electrodes ◽  
The Impact

The butt joint of dissimilar AISI304/AISI1015 steels was produced by a Shielded Metal Arc Welding (SMAW) with 3 types of the covered electrodes and the welding current of 80-120 A. The investigation of joint properties for the impact strength, the hardness, and the microstructure, was performed. The SMAW butt joint that was welded by the E312 covered electrode and 100A welding current showed the highest impact strength of 112 J. The chromium was the important reinforced element affected to increase in the hardness and the impact strength of the joint by forming and dispersing the chromium carbide in the weld metals. Interface structure of the carbon steel/the weld metal clearly showed a small combined area of the metals in opposition to the interface structure of the stainless steel/ the weld metal which had a large combined area of the metals.

scholarly journals Life Enhancement of Transverse Fillet Weld on Welds of HSLA S460G2+M using HFMI/PIT

2019 ◽  
Vol 8 (6) ◽  
pp. 3388-3391
Keyword(s):  
Fatigue Life ◽  
Gas Metal Arc Welding ◽  
Base Material ◽  
High Strength ◽  
Butt Joint ◽  
Fatigue Tests ◽  
Fillet Weld ◽  
Excessive Heat ◽  
Metal Arc Welding ◽  
Life Enhancement

This study deals with the fatigue life enhancement of the transverse fillet weld on welds of 10mm thickness of the high strength low alloy steel (HSLA) S460G2+M which is treated using high frequency mechanical impact tool called pneumatic impact treatment (HFMI/PIT). Initially, the plate S460g2+M is prepared with groove angles of butt joint and joined using gas metal arc welding (GMAW) with multi-pass welds followed by to weld the transverse attachment over the existing welds to produce a fillet weld on welds. Secondly, the HFMI/PIT treatment is applied on the fillet weld toe using 90Hz frequency, 6 bars of pneumatic pressure and 2 mm pin radius. Thirdly, the fatigue tests with constant amplitude loading are conducted on the untreated and treated specimens by applying 0.1 stress ratio and 55% to 75% stress loading from the yield strength of the base material. All fatigue data were evaluated based on international welding institute (IIW) commission XIII. It is found that the fatigue life of treated specimen is higher as compared with the untreated specimen. However, it is observed that an excessive heat input due to multi-pass welds has insignificant effect to the fatigue life of the untreated specimen.

scholarly journals SMAW: The Effects of Currents and Welding Rod Diameters on Welded Joint Ultimate Tensile Strength Using the Full Factorial DOE

2021 ◽  
Vol 2129 (1) ◽  
pp. 012071
Author(s):  
Noor Ajian Mohd-Lair ◽  
Yuselley Yuyut ◽  
Zabidi Ahmad ◽  
Abdullah Mohd Tahir
Keyword(s):  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Mild Steel ◽  
Welded Joint ◽  
Base Material ◽  
Welding Current ◽  
New Finding ◽  
Steel Aisi ◽  
Full Factorial ◽  
Significant Factors

Abstract This research was significant as it extensively studies the effects of current and rod diameter on SMAW welded join. The Mild Steel (AISI 1018) was used as the base material to be welded using the E-6013 welding rod. The experiment was constructed according to the full factorial design of experiment (DOE). This project found that the current and rod diameter are the significant factors in affecting the ultimate tensile strength (UTS). New contribution from this research was that the rod diameter is more significant than the current in affecting the UTS of a welded joint. In addition, this research also contributed new finding by showing that the interaction between current and rod diameter as significant in affecting the UTS. This interaction was also found to be more significant that current but less significant than rod diameter in affecting the UTS of welded joint. In addition, this research showed that the tensile strength increases when the current is increased from 80A to 100A. However, the tensile strength decreased as the current is set between 110A to 130A. At the same time, the welding rod diameter of 2.5mm produced the highest tensile strength compared to 3.2mm and 4.0mm rod diameter. This research also optimised the experiment and found that the highest tensile strength obtained is 342.39 MPa, which is produced using 80A of welding current with 2.5mm rod diameter.

scholarly journals Effect of Water Flow on Underwater Wet Welded A36 Steel

Metals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 682
Author(s):  
Eko Surojo ◽  
Aziz Harya Gumilang ◽  
Triyono Triyono ◽  
Aditya Rio Prabowo ◽  
Eko Prasetya Budiana ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Water Flow ◽  
Flow Rate ◽  
Water Flow Rate ◽  
Physical And Mechanical Properties ◽  
Shielded Metal Arc Welding ◽  
Effect Of Water ◽  
Bending Effect ◽  
Metal Arc Welding ◽  
A36 Steel

Underwater wet welding (UWW) combined with the shielded metal arc welding (SMAW) method has proven to be an effective way of permanently joining metals that can be performed in water. This research was conducted to determine the effect of water flow rate on the physical and mechanical properties (tensile, hardness, toughness, and bending effect) of underwater welded bead on A36 steel plate. The control variables used were a welding speed of 4 mm/s, a current of 120 A, electrode E7018 with a diameter of 4 mm, and freshwater. The results show that variations in water flow affected defects, microstructure, and mechanical properties of underwater welds. These defects include spatter, porosity, and undercut, which occur in all underwater welding results. The presence of flow and an increased flow rate causes differences in the microstructure, increased porosity on the weld metal, and undercut on the UWW specimen. An increase in water flow rate causes the acicular ferrite microstructure to appear greater, and the heat-affected zone (HAZ) will form finer grains. The best mechanical properties are achieved by welding with the highest flow rate, with a tensile strength of 534.1 MPa, 3.6% elongation, a Vickers microhardness in the HAZ area of 424 HV, and an impact strength of 1.47 J/mm2.

Mechanical Behaviour of CoCrMo Alloy with Si Content

2015 ◽  
Vol 754-755 ◽  
pp. 1017-1022 ◽  
Author(s):  
Petrică Vizureanu ◽  
Mirabela Georgiana Minciună ◽  
Dragoş Cristian Achiţei ◽  
Andrei Victor Sandu ◽  
Kamarudin Hussin
Keyword(s):  
Tensile Strength ◽  
Chemical Composition ◽  
Testing Machine ◽  
Base Material ◽  
Optical Emission ◽  
Experimental Tests ◽  
Optical Emission Spectrometry ◽  
Emission Spectrometry ◽  
Standard Samples

.The paper present aspects about the obtaining of non-precious dental alloys (type CoCrMo and CoCrMoSi7), the determination of chemical composition by optical emission spectrometry and the experimental tests for determining the tensile strength, made on standard plate samples. The base material used in experiments was a commercial alloy, from CoCrMo system, which belongs to the class of dental non-precious alloys, intended to medical applications. The obtaining of studied alloy was made on arc re-melting installation, under vacuum, type MRF ABJ 900. The process followed to realize a rapid melting, with a maximum admissible current intensity. The samples for tests were obtained by casting in an electric arc furnace, under vacuum, in optimal conditions for melting and solidification and processing by electro-erosion, to eliminate all the disturbing factors which come by processing conditions for the samples. The determination of chemical composition for cobalt based alloys, by optical emission spectrometry, was made on SpectromaxX equipment with spark. The electrical discharge is made with the elimination of an energy quantity, fact which determine plasma forming and light issue. Tensile tests for standard samples, made from cobalt based alloy, was made on Instron 3382 testing machine, and assisted by computer. The obtained results are: elongation, elasticity modulus, tensile strength and offer complete information about the analyzed mechanical properties. For the certitude of obtained experimental results, the tests were made on samples with specific dimensions according ISO 6892-1:2009(E) standard, both for the tensile strength, and also machine operation.

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