About this Abstract |
| Meeting |
11th International Symposium on Superalloy 718 and Derivatives 2026: Legacy, Innovations, and Future Directions
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| Symposium
|
Superalloy 718 and Derivatives 2026: Legacy, Innovations, and Future Directions
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| Presentation Title |
Microstructural Investigation of Underwater Welding of Inconel 718 Superalloy by Nd:YAG Laser |
| Author(s) |
Shahrzad Kianzadehpour, Mona Ghafari, Homama Nafakh |
| On-Site Speaker (Planned) |
Shahrzad Kianzadehpour |
| Abstract Scope |
In this research, a series of experiments with different water heights were conducted using an Nd:YAG laser welding machine on Inconel 718 superalloy, and its effect on the weldability of the alloy was investigated.
In this study, welding was performed on the alloy with a pulsed Nd:YAG laser welding machine with an average power of 300 watts and different water heights on 3mm thick samples of the alloy, and then the microstructure was analyzed and examined using an optical microscope.
The results of the study indicated that the factors affecting the quality of the weld include welding speed, laser power, and the height of the water used. In fact, as the height of the water above the sample surface increases, the quality of the resulting weld decreases in terms of both the presence of cracks and the depth of penetration. One of the reasons for this can be attributed to higher water heights and greater absorption of radiation by water.
Among the parameters used in alloy welding, a maximum power of 5 kW, a frequency of 4 Hz, and a welding speed of 0.5 mm/s were found to be the optimal parameters, along with a water depth of 3 mm from the sample surface as the best weld line among different water depths. At water heights above 3 mm, water has a stronger effect on welding and leads to cracking of the alloy. |
| Proceedings Inclusion? |
Definite: At-meeting proceedings |