INFLUENCE OF MULTI-PASS GTAW PARAMETERS ON MICROSTRUCTURE CHARACTERIZATION AND MECHANICAL PROPERTIES OF SAF 2507 SUPER DUPLEX STAINLESS STEEL
Ali, A., Mohamed, M., Mohamed, M., Elsoeudy, R., Eslam, A., Madeha, K. (2023). INFLUENCE OF MULTI-PASS GTAW PARAMETERS ON MICROSTRUCTURE CHARACTERIZATION AND MECHANICAL PROPERTIES OF SAF 2507 SUPER DUPLEX STAINLESS STEEL. EKB Journal Management System, 20(4), 12-26. doi: 10.21608/jest.2023.319429
A. S. Ali; M. El-Sayed Seleman Mohamed; M. Z. Ahmed Mohamed; R. I. Elsoeudy; Abd Elaal Mahmoud Eslam; Kamel Madeha. "INFLUENCE OF MULTI-PASS GTAW PARAMETERS ON MICROSTRUCTURE CHARACTERIZATION AND MECHANICAL PROPERTIES OF SAF 2507 SUPER DUPLEX STAINLESS STEEL". EKB Journal Management System, 20, 4, 2023, 12-26. doi: 10.21608/jest.2023.319429
Ali, A., Mohamed, M., Mohamed, M., Elsoeudy, R., Eslam, A., Madeha, K. (2023). 'INFLUENCE OF MULTI-PASS GTAW PARAMETERS ON MICROSTRUCTURE CHARACTERIZATION AND MECHANICAL PROPERTIES OF SAF 2507 SUPER DUPLEX STAINLESS STEEL', EKB Journal Management System, 20(4), pp. 12-26. doi: 10.21608/jest.2023.319429
Ali, A., Mohamed, M., Mohamed, M., Elsoeudy, R., Eslam, A., Madeha, K. INFLUENCE OF MULTI-PASS GTAW PARAMETERS ON MICROSTRUCTURE CHARACTERIZATION AND MECHANICAL PROPERTIES OF SAF 2507 SUPER DUPLEX STAINLESS STEEL. EKB Journal Management System, 2023; 20(4): 12-26. doi: 10.21608/jest.2023.319429

INFLUENCE OF MULTI-PASS GTAW PARAMETERS ON MICROSTRUCTURE CHARACTERIZATION AND MECHANICAL PROPERTIES OF SAF 2507 SUPER DUPLEX STAINLESS STEEL

Journal of the Egyptian Society of Tribology
Volume 20, Issue 4, October 2023, Page 12-26  XML PDF (1.59 MB)
Document Type: Original Article
DOI: 10.21608/jest.2023.319429
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Authors
A. S. Ali1; M. El-Sayed Seleman Mohamed2; M. Z. Ahmed Mohamed2, 3; R. I. Elsoeudy1; Abd Elaal Mahmoud Eslam4; Kamel Madeha1
1Mechanical Engineering Dept., Faculty of Engineering, Suez Canal University, EGYPT
2Department of Metallurgical and Materials Engineering, Faculty of Petroleum and Mining Engineering, Suez University, Suez 43512, Egypt
3Mechanical Engineering Dep., College of Engineering at Al Kharj, Prince Sattam Bin Abdulaziz University, Al Kharj 16273, Saudi Arabia
4Siemens-energy Company, Cairo, Egypt.
Abstract
In the present work, a 6 mm thickness SAF 2507-SDSS were welded by multi-pass gas tungsten arc welding (GTAW) process with ER2594 electrode using different heat inputs. Microstructure and mechanical properties of SAF 2507 joints obtained from multi-pass GTAW processes were investigated. The obtained joint was evaluated and characterized by using visual inspection, radiographic test, liquid penetrant test, optical microscopy, scanning electron microscopy, tensile and hardness test. The results obtained have shown that the type of filler electrode, heat input, and interpass temperature are the controlling factors in achieving a sound weld joint. The multi-pass GTAW of 2507 SDSS exhibited an enhancement in both hardness and yield strength compared to the base metal. In the welded zone, there were three distinct forms of austenite: Widmanstatten austenite (WA), intra-granular austenite (IGA), and grain boundary austenite (GBA), along with the presence of ferrite.  The number of welding passes and heat input had a significant impact on the α:γ ratio. The content of ferrite in the welded zone is relatively close to the equilibrium ratio of the base metal and did not exhibit significant fluctuations when employing various welding parameters.
Keywords
GTAW; mechanical properties; SAF 2507 SDSS; ferrite content; heat input; microstructure
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