Mechanical Behaviour of Inconel 718 Thin-Walled Laser Welded Components for Aircraft Engines
Nickel alloys are very important in many aerospace applications, especially to manufacture gas turbines and aero engine components, where high strength and temperature resistance are necessary. These kinds of alloys have to be welded with high energy density processes, in order to preserve their hig...
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| Language: | English |
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Wiley
2014-01-01
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| Series: | International Journal of Aerospace Engineering |
| Online Access: | http://dx.doi.org/10.1155/2014/721680 |
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| author | Enrico Lertora Chiara Mandolfino Carla Gambaro |
| author_facet | Enrico Lertora Chiara Mandolfino Carla Gambaro |
| author_sort | Enrico Lertora |
| collection | DOAJ |
| description | Nickel alloys are very important in many aerospace applications, especially to manufacture gas turbines and aero engine components, where high strength and temperature resistance are necessary. These kinds of alloys have to be welded with high energy density processes, in order to preserve their high mechanical properties. In this work, CO2 laser overlap joints between Inconel 718 sheets of limited thickness in the absence of postweld heat treatment were made. The main application of this kind of joint is the manufacturing of a helicopter engine component. In particular the aim was to obtain a specific cross section geometry, necessary to overcome the mechanical stresses found in these working conditions without failure. Static and dynamic tests were performed to assess the welds and the parent material fatigue life behaviour. Furthermore, the life trend was identified. This research pointed out that a full joint shape control is possible by choosing proper welding parameters and that the laser beam process allows the maintenance of high tensile strength and ductility of Inconel 718 but caused many liquation microcracks in the heat affected zone (HAZ). In spite of these microcracks, the fatigue behaviour of the overlap welds complies with the technical specifications required by the application. |
| format | Article |
| id | doaj-art-338c7174361f4dde95b1de9deb2dfb8f |
| institution | Kabale University |
| issn | 1687-5966 1687-5974 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Aerospace Engineering |
| spelling | doaj-art-338c7174361f4dde95b1de9deb2dfb8f2025-02-03T05:58:36ZengWileyInternational Journal of Aerospace Engineering1687-59661687-59742014-01-01201410.1155/2014/721680721680Mechanical Behaviour of Inconel 718 Thin-Walled Laser Welded Components for Aircraft EnginesEnrico Lertora0Chiara Mandolfino1Carla Gambaro2Department of Mechanical Engineering, Polytechnic School of Genoa, Via all’Opera Pia 15, 16145 Genoa, ItalyDepartment of Mechanical Engineering, Polytechnic School of Genoa, Via all’Opera Pia 15, 16145 Genoa, ItalyDepartment of Mechanical Engineering, Polytechnic School of Genoa, Via all’Opera Pia 15, 16145 Genoa, ItalyNickel alloys are very important in many aerospace applications, especially to manufacture gas turbines and aero engine components, where high strength and temperature resistance are necessary. These kinds of alloys have to be welded with high energy density processes, in order to preserve their high mechanical properties. In this work, CO2 laser overlap joints between Inconel 718 sheets of limited thickness in the absence of postweld heat treatment were made. The main application of this kind of joint is the manufacturing of a helicopter engine component. In particular the aim was to obtain a specific cross section geometry, necessary to overcome the mechanical stresses found in these working conditions without failure. Static and dynamic tests were performed to assess the welds and the parent material fatigue life behaviour. Furthermore, the life trend was identified. This research pointed out that a full joint shape control is possible by choosing proper welding parameters and that the laser beam process allows the maintenance of high tensile strength and ductility of Inconel 718 but caused many liquation microcracks in the heat affected zone (HAZ). In spite of these microcracks, the fatigue behaviour of the overlap welds complies with the technical specifications required by the application.http://dx.doi.org/10.1155/2014/721680 |
| spellingShingle | Enrico Lertora Chiara Mandolfino Carla Gambaro Mechanical Behaviour of Inconel 718 Thin-Walled Laser Welded Components for Aircraft Engines International Journal of Aerospace Engineering |
| title | Mechanical Behaviour of Inconel 718 Thin-Walled Laser Welded Components for Aircraft Engines |
| title_full | Mechanical Behaviour of Inconel 718 Thin-Walled Laser Welded Components for Aircraft Engines |
| title_fullStr | Mechanical Behaviour of Inconel 718 Thin-Walled Laser Welded Components for Aircraft Engines |
| title_full_unstemmed | Mechanical Behaviour of Inconel 718 Thin-Walled Laser Welded Components for Aircraft Engines |
| title_short | Mechanical Behaviour of Inconel 718 Thin-Walled Laser Welded Components for Aircraft Engines |
| title_sort | mechanical behaviour of inconel 718 thin walled laser welded components for aircraft engines |
| url | http://dx.doi.org/10.1155/2014/721680 |
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