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Root Pass Microstructure in Super Duplex Stainless Steel Multipass Welds
| Content Provider | Semantic Scholar |
|---|---|
| Author | Wagner, Danny |
| Copyright Year | 2019 |
| Abstract | Superduplex stainless steels (SDSS) have twice the base strength and pitting corrosion resistance of austenitic stainless steels and are commonly used when stresscorrosion cracking is a concern. During multipass welding of SDSS, a 50-50 austenite-ferrite phase balance is recommended in the exposed root pass fusion zone and heataffected zone (HAZ), although 35–65% of austenite is acceptable. Systematic studies with the arc energy and number of weld passes with mechanized multipass gas tungsten arc welding (GTAW) of 6-mm(0.24-in.-) and 12.7-mm(0.5-in.-) thick substrates (UNS S32750) reveal that multiple thermal cycles experienced in the root result in an increased root fusion zone austenite-ferrite ratio and presence of secondary austenite. Gleeble® 1500 physical reheating simulations, applying experimental thermal cycles directly measured in the root of multipass GTA welds, con- |
| File Format | PDF HTM / HTML |
| DOI | 10.29391/2019.98.010 |
| Alternate Webpage(s) | https://s3.amazonaws.com/WJ-www.aws.org/supplement/2019.98.010.pdf |
| Alternate Webpage(s) | https://doi.org/10.29391/2019.98.010 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
