Friction Stir Welding of Pipeline Steels
| Autor: | Murray W. Mahoney, Samuel Sanderson, Zhili Feng, Russell J. Steel, Scott M. Packer, Dale Fleck |
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| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | Friction Stir Welding and Processing VII ISBN: 9783319485829 Friction Stir Welding and Processing VII Scopus-Elsevier |
| DOI: | 10.1007/978-3-319-48108-1_7 |
| Popis: | In prior FSW studies, consistent full penetration in pipeline steel has proved to be a difficult goal when using a portable FSW system capable of operation in the field [1]. In a previous study, metallography, mechanical testing (tensile and Charpy impact), and workmanship testing (root bend) demonstrated that full penetration can be achieved through much of the weld length, and when full penetration is achieved, mechanical properties are excellent. However, at times there remained sections of the weld that did not exhibit full penetration. As an example, metallography and root bend tests of the weld root have shown full penetration at many locations around the pipe circumference while from the same weld, locations are identified where remnant faying surfaces remain and full penetration was not achieved. Further, some welds exhibit full penetration accompanied by a continuous oxide path that remains at the weld root. Conversely, if the FSW tool penetrates into the support anvil, anvil material is drawn into the weld nugget. Thus, different approaches need to be developed to assure consistent full penetration without anvil contact. |
| Databáze: | OpenAIRE |
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