HEAT INPUT EFFECT OF THE FCAW PROCESS ON THE MICROSTRUCTURE AND MECHANICAL PROPERTIES OF STRUCTURAL STEEL JOINTS
Flux-cored wires are commonly used in structural and pipeline welding, shipbuilding, offshore constructions, and petrochemical and power generation industries. The higher heat inputs in the multipass welding result in shorter production time while considerably changing the properties of the welded j...
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| Format: | Article |
| Language: | English |
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Bursa Uludag University
2022-12-01
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| Series: | Uludağ University Journal of The Faculty of Engineering |
| Subjects: | |
| Online Access: | https://dergipark.org.tr/tr/download/article-file/2581172 |
| _version_ | 1797912597431844864 |
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| author | Uğur Gürol |
| author_facet | Uğur Gürol |
| author_sort | Uğur Gürol |
| collection | DOAJ |
| description | Flux-cored wires are commonly used in structural and pipeline welding, shipbuilding, offshore constructions, and petrochemical and power generation industries. The higher heat inputs in the multipass welding result in shorter production time while considerably changing the properties of the welded joint. In this study, robotic flux cored arc welding with varying heat inputs (between 0.56-2.52 kJ/mm) was performed to determine the effect of heat input on weld microstructure, hardness, tensile properties, and impact toughness in the structural steel joints. Results exhibited that decrease in heat input from 2.52 to 0.56 kJ/mm changed the majority of the microstructure from polygonal ferrite to acicular ferrite. Furthermore, this increased by 56%, 37%, and 47% in yield strength, tensile strength, and hardness values, respectively, while decreasing by 30% and 15% in elongation and Charpy impact test results, respectively. Moreover, all welded joints displayed a satisfying toughness value higher than the requested value of 47 J, even at the test temperature of -50 °C. Finally, it can be concluded that the optimum results were obtained with a heat input of 1.26 kJ/mm, considering the minimum requirements of the AWS A5.20 standard and the expectations in applications. |
| first_indexed | 2024-04-10T11:59:16Z |
| format | Article |
| id | doaj.art-a0910253b590434aaeea2cc7c850b90e |
| institution | Directory Open Access Journal |
| issn | 2148-4147 2148-4155 |
| language | English |
| last_indexed | 2024-04-10T11:59:16Z |
| publishDate | 2022-12-01 |
| publisher | Bursa Uludag University |
| record_format | Article |
| series | Uludağ University Journal of The Faculty of Engineering |
| spelling | doaj.art-a0910253b590434aaeea2cc7c850b90e2023-02-15T16:16:42ZengBursa Uludag UniversityUludağ University Journal of The Faculty of Engineering2148-41472148-41552022-12-012731207122010.17482/uumfd.11578411779HEAT INPUT EFFECT OF THE FCAW PROCESS ON THE MICROSTRUCTURE AND MECHANICAL PROPERTIES OF STRUCTURAL STEEL JOINTSUğur Gürol0GEDİK ÜNİVERSİTESİ, MÜHENDİSLİK FAKÜLTESİ, METALURJİ VE MALZEME MÜHENDİSLİĞİ BÖLÜMÜFlux-cored wires are commonly used in structural and pipeline welding, shipbuilding, offshore constructions, and petrochemical and power generation industries. The higher heat inputs in the multipass welding result in shorter production time while considerably changing the properties of the welded joint. In this study, robotic flux cored arc welding with varying heat inputs (between 0.56-2.52 kJ/mm) was performed to determine the effect of heat input on weld microstructure, hardness, tensile properties, and impact toughness in the structural steel joints. Results exhibited that decrease in heat input from 2.52 to 0.56 kJ/mm changed the majority of the microstructure from polygonal ferrite to acicular ferrite. Furthermore, this increased by 56%, 37%, and 47% in yield strength, tensile strength, and hardness values, respectively, while decreasing by 30% and 15% in elongation and Charpy impact test results, respectively. Moreover, all welded joints displayed a satisfying toughness value higher than the requested value of 47 J, even at the test temperature of -50 °C. Finally, it can be concluded that the optimum results were obtained with a heat input of 1.26 kJ/mm, considering the minimum requirements of the AWS A5.20 standard and the expectations in applications.https://dergipark.org.tr/tr/download/article-file/2581172robotik mag kaynağıözlü kaynak teliyapısal çelik birleştirmelerimikro yapı karakterizasyonumekanik özelliklerisı girdisirobotic mag weldingflux-cored welding wirestuctural steel jointsmicrostructural characterizationmechanical propertiesheat input |
| spellingShingle | Uğur Gürol HEAT INPUT EFFECT OF THE FCAW PROCESS ON THE MICROSTRUCTURE AND MECHANICAL PROPERTIES OF STRUCTURAL STEEL JOINTS Uludağ University Journal of The Faculty of Engineering robotik mag kaynağı özlü kaynak teli yapısal çelik birleştirmeleri mikro yapı karakterizasyonu mekanik özellikler isı girdisi robotic mag welding flux-cored welding wire stuctural steel joints microstructural characterization mechanical properties heat input |
| title | HEAT INPUT EFFECT OF THE FCAW PROCESS ON THE MICROSTRUCTURE AND MECHANICAL PROPERTIES OF STRUCTURAL STEEL JOINTS |
| title_full | HEAT INPUT EFFECT OF THE FCAW PROCESS ON THE MICROSTRUCTURE AND MECHANICAL PROPERTIES OF STRUCTURAL STEEL JOINTS |
| title_fullStr | HEAT INPUT EFFECT OF THE FCAW PROCESS ON THE MICROSTRUCTURE AND MECHANICAL PROPERTIES OF STRUCTURAL STEEL JOINTS |
| title_full_unstemmed | HEAT INPUT EFFECT OF THE FCAW PROCESS ON THE MICROSTRUCTURE AND MECHANICAL PROPERTIES OF STRUCTURAL STEEL JOINTS |
| title_short | HEAT INPUT EFFECT OF THE FCAW PROCESS ON THE MICROSTRUCTURE AND MECHANICAL PROPERTIES OF STRUCTURAL STEEL JOINTS |
| title_sort | heat input effect of the fcaw process on the microstructure and mechanical properties of structural steel joints |
| topic | robotik mag kaynağı özlü kaynak teli yapısal çelik birleştirmeleri mikro yapı karakterizasyonu mekanik özellikler isı girdisi robotic mag welding flux-cored welding wire stuctural steel joints microstructural characterization mechanical properties heat input |
| url | https://dergipark.org.tr/tr/download/article-file/2581172 |
| work_keys_str_mv | AT ugurgurol heatinputeffectofthefcawprocessonthemicrostructureandmechanicalpropertiesofstructuralsteeljoints |