Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : SAW

Study of Mechanical Properties of Carbon Steel Plate SA-516 Gr. 70 Welded by SAW Using V-Shape Joint Design

Samir A. Amin; Mohannad Y. Hanna; Abdulaziz S. Khider

Engineering and Technology Journal, 2020, Volume 38, Issue 2, Pages 152-165
DOI: 10.30684/etj.v38i2A.269

Submerged arc welding (SAW) is a fusion type welding and it is considered one of the most important welding types due to its inherent capabilities of high welding speed, high deposition rate, welding large thickness plates owing to its deep penetration characteristic and many other advantages. In this study, the goal was to investigate the effect of welding parameters, namely (welding current and welding speed) as well as the joint design on the mechanical properties (yield stress, bending force on the face of the weldment and hardness of the weld metal. Experiments were conducted employing Design of Expert (DOE) software and Response Surface Methodology (RSM) technique. The experiments were conducted by welding ASME SA-516 Gr. 70 steel plate with dimension (300 mm × 150 mm × 10 mm) depending upon the design matrix developed via the DOE. Results manifested that the optimum process parameters for maximum yield stress, maximum bending force and minimum hardness were at (425 amps) welding current and (35 cm/min) welding speed, where the arc voltage was held constant at (37 volts). The optimum values for the yield stress, bending force and hardness were (474.447 MPa, 36.997 kN and 150 HV), respectively. Finally, it was found that the predicted and experimental results of yield stress, bending force and hardness agree very well according to the ultimate error (1.05%, 1.92%, and 4.25 %), respectively.

Influence of SAW Welding Parameters on Microhardness of Steel A516-Gr60

Sadeq H. Bakhy; Samir A. Amin; Fouad A. Abdullah

Engineering and Technology Journal, 2018, Volume 36, Issue 10A, Pages 1039-1047
DOI: 10.30684/etj.36.10A.4

Submerged Arc Welding (SAW) process is generally used for industries, such as petroleum storage tanks, pressure vessels, and structural components.
Good mechanical properties of welded joint lead to crack-free strong joints. In this research, included angle, current, welding travel speed and arc voltage were utilized as welding parameters to weld ASTM A516 Grade 60 (low carbon steel). The experiments were carried out according to a design matrix that established by DOE (Version10) with RSM technique. Microhardness of welded samples was measured by a Digital Microhardness Tester, and then RSM technique was used to model and optimize the microhardness based on the welding parameters. The results showed that the including angle and welding current have a great effect on the microhardness. The optimum solution for minimum microhardness was found at 450 Amp welding current, 38 cpm welding speed, 34-volt arc voltage and included angle of 60⁰. The optimum value of microhardness was (186.7 HV). Eventually, the experimental and predicted results of microhardness were found in good agreement with 4.6%. maximum error.

Landfill Site Selection for Kerbala Municipal Solid Wastes by Using Geographical Information System Techniques

Riyad Al-Anbari; AumarAlnakeeb; Mohammad A. Abdulredha

Engineering and Technology Journal, 2014, Volume 32, Issue 13, Pages 3130-3144
DOI: 10.30684/etj.32.13A.5

One of the serious and growing potential problems in most large urban areas is the shortage of land for waste disposal. Although there are some efforts to reduce and recover the waste, disposal in landfills is still the most common method for solid wastes destination. Optimized siting decision reduces negative effects to residents living in its vicinity, thereby enhancing the overall sustainability associated with the life cycle of a landfill. In this study, candidate sites for an appropriate landfill area in Kerbala are determined by using the integration of Geographic Information Systems (GIS) and multi- criteria decision analysis (MCDA). Eight input digital map layers including urban centers, Hamlets, industrial areas, sub roads, wetlands, pipe line, soil characteristics, and surface water are produced using a geographical information system. Simple additive weighing method (SAW) within (MCDA) is used to analyze the prepared maps and produce final suitability map. According to the digital maps produced by this method, the analysis results in selection of one landfill site located in the north of Kerbala city. The area of landfill site selected is 6,800,000 m2 and, its volume is 20,400,000 m3.