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Journal of Welding Technology
Published by Politeknik Negeri Lhokseumawe
ISSN : 27161471     EISSN : 27160475     DOI : -
Core Subject : Science, Engineering,
Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
The main scope of the journal is to publish original research articles in the area of Welding Technology The main focus of the journal is on experimental research. The scope of the journal includes;
Arjuna Subject : Ilmu Material (semua kategori) - Ilmu Material (Lain-Lain)
Articles 5 Documents
 1 
Search results for , issue "Vol 3, No 1 (2021): June" : 5 Documents clear
Analisa pengaruh variasi arus pengelasan GTAW pada baja AISI 1050 terhadap sifat fisik dan mekanis T. Juwandi; Jenne Syarif; zulkiflli zulkiflli
Journal of Welding Technology Vol 3, No 1 (2021): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v3i1.2026

Abstract

Analysis of the effect of variations in welding current GTAW on AISI 1050 steel on physical and mechanical properties, the aim of research is to determine the stress strength, strain and see to determine the character or treatment of AISI 1050 steel. The welding process is closely related to defects that affect its mechanical properties. In this study, the welding process was carried out under the hands of the IASI 1050 material with a thickness of 12 mm with an AWS ER70S-6 electrode with a diameter of 1.2 mm with a current variation of 110 amperes, 120 amperes and 130 amperes with tests carried out are tensile and microstructure testing. From the results of the tensile test, it can be concluded that the tensile stress on the 110 amper specimen is 83.34 kgf/mm2, and the tensile voltage at 120 amperes is 43.45 kgf / mm2, and the tensile voltage at 130 amperes is 67, 97 kgf/mm2 that the higher the welding current, the more ductile the tensile strength value and the greater the welding current, the rougher the surface metallography results.
Analisa pengaruh kuat arus hasil pengelasan GMAW terhadap kekerasan material ASTM A 36 Juwanda Juwanda; Saifuddin Saifuddin; Marzuki Marzuki
Journal of Welding Technology Vol 3, No 1 (2021): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v3i1.2027

Abstract

GMAW welding is a welding process that uses CO2 gas as a protective medium for weld metal from the influence of outside air. This welding uses a heat source from electrical energy which is converted or converted into heat energy. While ASTM A 36 steel plate is steel that has a carbon content of 0.30% so it is classified as low carbon steel. This steel is widely used in the market because it has many advantages, one of which has good welding properties (machinability), good wear resistance (wear) and good mechanical properties as well. This study aims to determine the hardness value of the welding results using the hardness test method in the GMAW welding process to ASTM A 36 steel with a 60ĚŠ V angle seam. The variations of the currents used in this welding process are 80,100 and 120 Amper. From the tests that have been done, it is known that the lowest hardness strength at current 80 produces a hardness value of 65.60 Hrc. Meanwhile, the highest hardness value at 100 Amper flow obtained a hardness value of 80.40 HRC
Analisa pengaruh putaran spindel pada friction welding terhadap tensile strength Alumunium A6061 Teuku Haikal Derniawan; Nurdin Nurdin; Fakhriza Fakhriza
Journal of Welding Technology Vol 3, No 1 (2021): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v3i1.2034

Abstract

The welding process using the friction welding method uses friction energy which turns into heat to join two metals. The welding process that occurs on the touch surface of the two metals results in a larger welding area compared to other welding methods where the welding area is only at the contact edge of the metal being joined. With the welding area that is on the entire surface of the joined plane, it allows this type of friction welding joint to accept a greater torsional load, so that in its application friction welding is very suitable for use in the process of joining shafts and metal materials that have circular profiles. The purpose of this study was to determine the effect of spindle rotation on friction welding on the mechanical properties of welding joints on Aluminum 6061 material. Its mechanical properties include a tensile strength test, with variations in spindle rotation on a lathe using 6061 aluminum material. Based on the results of the tensile test at 1500 rpm where the maximum stress on the A1 sempel is 8.88 Kgf/mm2, A2 sempel 8.83 Kgf/mm2 and sempel A3 10,83 Kgf/mm2. And at 2500 rpm where the tensile strength of the B1 sample is 10.73 Kgf/mm2, the B2 sempel is 11.26 Kgf/mm2 and the B3 sempel is 8.20 Kgf/mm2. From the results of the tensile test, it was obtained that the strength of the 6061 Aluminium joint by the friction welding method was the highest yield strength of 5.8 kg/mm2 and a maximum tensile strength of 11.26 kg/mm2, and the raw material tensile strength was 12.6 kgf/mm2, the tensile strength of raw material and material after friction welding differs only slightly
Effect of variation of TIG welding current on tensile strength and hardness of aluminium A-6061 Azwinur Azwinur; Syukran Syukran
Journal of Welding Technology Vol 3, No 1 (2021): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v3i1.2226

Abstract

Aluminium is a material that is now widely used for welding because this material has good mechanical properties, is corrosion resistant, is light in weight and can be recycled. The problem that occurs in aluminium welding is the presence of a passive layer or layer of Al2O3 oxide which has a high affinity for oxygen. This oxide layer is also an insulator which can inhibit the flow of current in welding. The amount of current in the welding process greatly affects the amount of heat input, weld concentration and arc stress. The purpose of this study was to determine changes in the mechanical properties of tensile strength and hardness of welded metal joints with variations in welding current on aluminium Al-6061 using the TIG welding process. The stages of the research method carried out were to carry out the TIG welding process on aluminium material joints with variations in currents of 120A, 140A and 160A. The filler rods used were AWS A5.10/ER-5356 and argon gas with a flow volume of 15 l/m. Furthermore, the results of the weld are tested for tensile and hardness to determine changes in the mechanical properties of the weld joint. The results show that the magnitude of the welding current affects the strength of the welding joint in terms of mechanical properties, especially the value of the tensile strength and hardness of the material when receiving loads and also affects the strain or elongation of a material. The highest tensile strength value is at a current strength of 160A of 9.83 Kgf/mm2, while the lowest tensile strength value is welding using a current strength of 120A with a value of 9.73 Kgf/mm2. The most ductile or ductile welded joints are welding using a current of 120A. While the highest hardness value was in the 160A weld metal area of 95.17 HRE and the lowest was in the HAZ area of 160A current of 41.17 HRE
Critical Path Method (CPM) pada pengerjaan pipeline dan analisis resiko pada pengelasan Febriti Aryan Kumala; Endang Pudji Purwanti; Mochammad Karim Al Amin
Journal of Welding Technology Vol 3, No 1 (2021): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v3i1.2068

Abstract

The pipeline construction project at PT. Gearindo Prakarsa often delays because many activities are not in accordance with the target, this is due to the repair process on welding and lack of manpower in some activities. This results in the actual duration being longer than the planning duration. So it is necessary to control the control through optimizing the schedule and implementation costs as well as risk analysis for the welding process. CPM and crashing methods are one of the methods used in controlling to get a more optimal time and cost duration. Meanwhile, to overcome any improvements made by conducting a risk analysis to determine the risk of defects from safety, environmental and cost factors. If the welding activity does not change the welding process, using the CPM and crashing methods, the optimal time is 59 days by adding 15 workers and costs Rp. 9,001,453. If the overall welding process changes with SMAW or GTAW, by analyzing the increase in consumption costs of Rp. 27,72,000 for the SMAW process and Rp. 44,366,169, for the GTAW process. In terms of the level of risk, porosity defects and incomplete fusion in the SMAW process are at a high risk level for safety, environmental and cost factors. Meanwhile, in the GTAW process, complete fusion defects are at a high risk level for the cost factor.

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