Abstract
A 50.8-mm-deep gas tungsten arc weld was made with matching filler metal in cast Haynes 282 alloy. The narrow-gap joint was filled with 104 weld beads. Visual and dye-penetrant inspection of cross-weld specimens indicated that the cast base metal contained numerous casting defects. No visible indications of physical defects were found in the weld deposit. The weld heat-affected zone was characterized by microcracking and localized recrystallization. The cause of the cracking could not be determined. Hardness testing showed that a softened region in the as-welded heat-affected zone was nearly eliminated by post-weld heat treatment. Tensile testing up to 816 °C showed that cross-weld specimen strengths ranged from 57 to 79% of the cast base metal tensile strength. The stress-rupture strengths of cross-weld specimens are within 20% of base metal reference data. Failures of both tensile and stress-rupture specimens occurred in the base metal.
Original language | English |
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Pages (from-to) | 961-971 |
Number of pages | 11 |
Journal | Welding in the World |
Volume | 65 |
Issue number | 5 |
DOIs | |
State | Published - May 2021 |
Funding
This research was sponsored at the Oak Ridge National Laboratory by the U.S. Department of Energy, Office of Fossil Energy, under Contract DE-AC05-00OR22725 with UT Battelle, LLC. Significant contributions to this work were made by Alan Frederick, Tom Geer, Doug Kyle, Tracie Lowe, and Jeremy Moser. Their support was critical to coordinating and completing numerous technical activities, testing, and analyses. Technical discussions with Michael Haines of University of Tennessee were appreciated. Wei Tang and Peter Tortorelli reviewed the manuscript for technical content and provided many thoughtful comments.
Keywords
- 282
- Cast
- Hardness
- Haynes
- Strength
- UNS N07208
- Weld