HUSEYIN KARABULUT - Academia.edu (original) (raw)
Papers by HUSEYIN KARABULUT
Exhaust gas recirculation tubes were used for this study. To make bellows shape from TIG (Tungste... more Exhaust gas recirculation tubes were used for this study. To make bellows shape from TIG (Tungsten Inert Gas) welded extra thin tubes hydraulic forming method is used in industry. For this study, 0.2 mm thick AISI 321 austenitic sheets were combined by using micro TIG welding method and 11.80 mm in diameter pipes were produced. For the TIG welding process of thin sheet tubes shaped by liquid pressure precise welding parameter adjustment is required. With the micro TIG arc welding technique, healthy weld seams were obtained in three different power parameters. The effects of this differences on the mechanical properties and microstructure of the weld joints were experimentally investigated. The welding speed was kept constant and three different welding current and voltage values were selected. The images of the weld zone of the samples were taken by an optical microscope. The microstructures formed in the weld zone were examined. Micro hardness values of the base metal, HAZ (Heat Af...
Radiation Physics and Chemistry, 2019
The main aim of this study was to reduce the rate of daily hydrocarbons (HC) released into the at... more The main aim of this study was to reduce the rate of daily hydrocarbons (HC) released into the atmosphere from polyamide-based automotive fuel transfer system pipes due to diffusion using radiation processing technology. The second aim of this study was to improve the pressure level and impact strength of these pipelines. In order to manage these aims, layer by layer extruded pipelines constructed from different types of thermoplastic materials (i.e. PA6, EVOH and radiation crosslinkable 5% 1,3,5-triallyl-1,3,5-triazin-2,4,6(1H,3H,5H)-trion (TAIC) containing PA12 (Creamid-12)) were irradiated using -rays (up to 100 kGy) at room temperature to carry out a radiation-induced crosslinking process. The mechanical properties of the samples were evaluated using tensile and cold impact tests. Sol-gel analysis of the irradiated samples was performed to determine the gel content, gelation dose and chain scission/crosslinking ratio. The Charlesby-Pinner and Charlesby-Rosiak equations were used for our calculations. The change in the HC diffusion of the crosslinked pipes was measured using a sealed housing for evaporative determination (SHED) device. An improvement in the pressure resistance was observed for the samples under an increasing fluid pressure using a blasting test device. The SHED results showed that the gas permeability value is reduced ~1.9 fold in the 65 kGy irradiated fuel transfer pipelines. The blasting test results indicate that the average pressure resistivity of the 65 kGy irradiated and 76.5% cross-linked pipe samples was ~19% greater than that observed for the unirradiated samples. The results of this study show that the radiation cross-linking process is an excellent strategy to reduce the daily hydrocarbon emissions from new generation fuel transfer pipelines.
Sound is simply a kind energy which sprawls to environment as waves. Sound changes pressure at ai... more Sound is simply a kind energy which sprawls to environment as waves. Sound changes pressure at air, water etc. which this detected by ears as sound. At the other hand noise is a kind of sound which is unpleasant, and undesirable for humans. In automotive industry, noise effects drivers and passengers comfort directly. Because of that, automotive manufacturers consider noise insulation in automobiles as an important factor for quality. Ethylene Propylene Diene Monomer Rubber (EPDM), Natural Rubber (NR) and Nitrile Rubber (NBR) are one of the most used insulation materials in automotive industry. In this study, EPDM, NR and NBR materials sound absorption coefficient and sound transmission loss are measured with impedance tube for investigate these materials as insulation part placed between passenger cabin and engine side on shifter mechanisms. Measurements repeated three times and results showed at graphics. Results are which obtained from tests are presented systematically in this s...
Exhaust gas recirculation tubes were used for this study. To make bellows shape from TIG (Tungste... more Exhaust gas recirculation tubes were used for this study. To make bellows shape from TIG (Tungsten Inert Gas) welded extra thin tubes hydraulic forming method is used in industry. For this study, 0.2 mm thick AISI 321 austenitic sheets were combined by using micro TIG welding method and 11.80 mm in diameter pipes were produced. For the TIG welding process of thin sheet tubes shaped by liquid pressure precise welding parameter adjustment is required. With the micro TIG arc welding technique, healthy weld seams were obtained in three different power parameters. The effects of this differences on the mechanical properties and microstructure of the weld joints were experimentally investigated. The welding speed was kept constant and three different welding current and voltage values were selected. The images of the weld zone of the samples were taken by an optical microscope. The microstructures formed in the weld zone were examined. Micro hardness values of the base metal, HAZ (Heat Af...
Radiation Physics and Chemistry, 2019
The main aim of this study was to reduce the rate of daily hydrocarbons (HC) released into the at... more The main aim of this study was to reduce the rate of daily hydrocarbons (HC) released into the atmosphere from polyamide-based automotive fuel transfer system pipes due to diffusion using radiation processing technology. The second aim of this study was to improve the pressure level and impact strength of these pipelines. In order to manage these aims, layer by layer extruded pipelines constructed from different types of thermoplastic materials (i.e. PA6, EVOH and radiation crosslinkable 5% 1,3,5-triallyl-1,3,5-triazin-2,4,6(1H,3H,5H)-trion (TAIC) containing PA12 (Creamid-12)) were irradiated using -rays (up to 100 kGy) at room temperature to carry out a radiation-induced crosslinking process. The mechanical properties of the samples were evaluated using tensile and cold impact tests. Sol-gel analysis of the irradiated samples was performed to determine the gel content, gelation dose and chain scission/crosslinking ratio. The Charlesby-Pinner and Charlesby-Rosiak equations were used for our calculations. The change in the HC diffusion of the crosslinked pipes was measured using a sealed housing for evaporative determination (SHED) device. An improvement in the pressure resistance was observed for the samples under an increasing fluid pressure using a blasting test device. The SHED results showed that the gas permeability value is reduced ~1.9 fold in the 65 kGy irradiated fuel transfer pipelines. The blasting test results indicate that the average pressure resistivity of the 65 kGy irradiated and 76.5% cross-linked pipe samples was ~19% greater than that observed for the unirradiated samples. The results of this study show that the radiation cross-linking process is an excellent strategy to reduce the daily hydrocarbon emissions from new generation fuel transfer pipelines.
Sound is simply a kind energy which sprawls to environment as waves. Sound changes pressure at ai... more Sound is simply a kind energy which sprawls to environment as waves. Sound changes pressure at air, water etc. which this detected by ears as sound. At the other hand noise is a kind of sound which is unpleasant, and undesirable for humans. In automotive industry, noise effects drivers and passengers comfort directly. Because of that, automotive manufacturers consider noise insulation in automobiles as an important factor for quality. Ethylene Propylene Diene Monomer Rubber (EPDM), Natural Rubber (NR) and Nitrile Rubber (NBR) are one of the most used insulation materials in automotive industry. In this study, EPDM, NR and NBR materials sound absorption coefficient and sound transmission loss are measured with impedance tube for investigate these materials as insulation part placed between passenger cabin and engine side on shifter mechanisms. Measurements repeated three times and results showed at graphics. Results are which obtained from tests are presented systematically in this s...