An evaluation of multipass narrow gap laser welding as a candidate process for the manufacture of nuclear pressure vessels
| Autor: | Yongle Sun, John Francis, Anastasia Vasileiou, Jiecai Feng, Dinesh W. Rathod, Lin Li, Wei Guo, Michael Smith, Neil Irvine, Matthew Roy |
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| Rok vydání: | 2017 |
| Předmět: |
Heat-affected zone
Materials science Mechanical engineering single-sided weld 02 engineering and technology Electrogas welding Welding magnetic beam deflection Electric resistance welding Gas metal arc welding law.invention Post-weld heat treatment 0203 mechanical engineering law Dalton Nuclear Institute General Materials Science conduction mode welding Mechanical Engineering Gas tungsten arc welding Metallurgy Laser beam welding welding productivity 021001 nanoscience & nanotechnology ResearchInstitutes_Networks_Beacons/dalton_nuclear_institute 020303 mechanical engineering & transports narrow-groove weld Mechanics of Materials Arc welding 0210 nano-technology |
| Zdroj: | Feng, J C, Rathod, D W, Roy, M, Francis, J, Guo, W, Irvine, N, Vasileiou, A, Sun, Y L, Smith, M & Li, L 2017, ' An Evaluation of Multipass Narrow Gap Laser Welding as a Candidate Process for the Manufacture of Nuclear Pressure Vessels ', International Journal of Pressure Vessels and Piping, vol. 157 . https://doi.org/10.1016/j.ijpvp.2017.08.004 |
| ISSN: | 0308-0161 |
| DOI: | 10.1016/j.ijpvp.2017.08.004 |
| Popis: | Nuclear pressure vessels are currently fabricated using arc welding processes. Recently, considerable effort has been directed at the development of electron beam welding as an alternative fabrication technique owing to the substantial productivity gains it would offer. However, little attention has been directed at laser-based techniques. In this work we evaluate the potential for applying multipass narrow-gap laser welding (NGLW) to the fabrication of nuclear pressure vessels, based on the characterization of a 30 mm thick weld in SA508 steel. Although still a multipass process, the number of passes is reduced in comparison to an arc weld of the same thickness, and the deposition of successive passes provides a degree of tempering to previously deposited weld metal in a way that the electron beam welding process does not. Principal engineering challenges for the implementation of multipass NGLW include the achievement of appropriate joint fit-up, and the shielding of a molten pool at the base of a deep and narrow weld groove. |
| Databáze: | OpenAIRE |
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