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Effect of filler wires on mechanical properties of super-duplexstainless steel UNS S32750 and austenitic stainless steel 304dissimilar joints welded with PCGTAW technique |
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| รหัสดีโอไอ | |
| Creator | 1. Balram Yelamasetti 2. Venkat Ramana G. 3. Tirupathi Kadam |
| Title | Effect of filler wires on mechanical properties of super-duplexstainless steel UNS S32750 and austenitic stainless steel 304dissimilar joints welded with PCGTAW technique |
| Publisher | Research and Development Office, Prince of Songkla University |
| Publication Year | 2565 |
| Journal Title | Songklanakarin Journal of Science an Technology (SJST) |
| Journal Vol. | 44 |
| Journal No. | 1 |
| Page no. | 149-156 |
| Keyword | super-duplex stainless steel, austenitic stainless steel, PCGTAW technique, mechanical properties, microstructural studies |
| URL Website | https://rdo.psu.ac.th/sjst/index.php |
| ISSN | 0125-3395 |
| Abstract | This study addresses the effects of fillers (ERNiCrMo-3, ERNiCrMo-4 and ER309L) for joining 5 mm dissimilarmetals of super-duplex steel (UNS S32750) and austenitic stainless steel (AISI 304) by using pulsed current gas tungsten arcwelding. Welding parameters were fixed across all cases with the three alternative filler wires. Mechanical properties ofweldments were evaluated by conducting impact, tensile and microhardness tests. Microstructural changes were studied byoptical microscopy. The ratio of proof stress to ultimate tensile strength, and the ultimate tensile strength were found to be higherwith ERNiCrMo-4 (0.6, 642 MPa) filler weldment than with ERNiCrMo-3 (0.57, 624 MPa) or ER309L (0.56, 612 MPa) fillerweldments. Microhardness of the weldment with ERNiCrMo-4 filler was higher than with the other two fillers. It was observedfrom the impact test results that the ERNiCrMo-4 filler weldment exhibited superior toughness of 189 J. |
