EFFECT OF MULTI-PASS SHIELDED METAL ARC WELDING ON MICROSTRUCTURE CHARACTERIZATION AND MECHANICAL PROPERTIES OF 2507 SUPER DUPLEX STAINLESS STEEL | ||
| Journal of the Egyptian Society of Tribology | ||
| Volume 20, Issue 3, July 2023, Pages 95-108 PDF (1.81 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jest.2023.308339 | ||
| Authors | ||
| A. S. Ali1; M. El-Sayed Seleman Mohamed2; M. Z. Ahmed Mohamed2, 3; R. I. Elsoeudy1; Abd Elaal Mahmoud Eslam4; N. Elzayady5 | ||
| 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 | ||
| 5Mechanical and Aerospace Department, Institute of Aviation Engineering and Technology, Giza, EGYPT. | ||
| Abstract | ||
| The present work investigates the weldability, microstructure, and mechanical properties of 6 mm thick 2507 super duplex stainless steel were welded by multi-pass shielded metal arc welding technique (SMAW) with ER2595 electrode using different heat inputs. The produced joint was characterized and evaluated by using radiographic inspection, liquid penetrant test, scanning electron microscopy, optical microscopy, hardness and tensile test. The results obtained demonstrated that the filler electrode, heat inputs and interpass temperature are the parameters control for produce of defect-free joint. The 2507 SDSS shielded metal arc welding show an improvement in hardness and yield strength compared to the base metal. The weld zone exhibited four distinct morphologies of austenite including secondary austenite (SA), Widmanstatten austenite (WA), intra-granular austenite (IGA), and grain boundary austenite (GBA), in addition to the presence of ferrite. The ferrite content in the weld zone remained close to the balance ratio of base metal and showed no significant variation when using different welding parameters. | ||
| Keywords | ||
| 2507 SDSS, mechanical properties, microstructure; SMAW, ferrite content | ||
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