Abstract
A single-crystal nickel-based superalloy (alloy Rene N5) was welded using laser and electron beam processes. The resultant microstructure was examined by optical microscopy. It was found that extensive stray grain formation took place, and furthermore, the stray grain formation was not symmetrical with respect to the weld centerline. The results were interpreted with the use of the theories of Kurz and co-workers on dendrite tip growth and constitutional supercooling ahead of the advancing dendrite solidification front. It was found that the theories explain the observations quite well, and provide the basis for optimizing the weld conditions in the future so as to yield stray-grain free welds in single crystals.
| Original language | English |
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| Title of host publication | Solidification Processes and Microstructures |
| Subtitle of host publication | A Symposium in Honor of Wilfried Kurz |
| Editors | M. Rappaz, C. Beckermann, R. Trivedi |
| Pages | 61-66 |
| Number of pages | 6 |
| Publication status | Published - 2004 Jul 14 |
| Event | Solidification Processes and Microstructures: A Symposium in Honor of Wilfried Kurz - Charlotte, NC., United States Duration: 2004 Mar 14 → 2004 Mar 18 |
Publication series
| Name | Solidification Processes and Microstructures: A Symposium in Honor of Wilfried Kurz |
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Other
| Other | Solidification Processes and Microstructures: A Symposium in Honor of Wilfried Kurz |
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| Country | United States |
| City | Charlotte, NC. |
| Period | 04/3/14 → 04/3/18 |
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All Science Journal Classification (ASJC) codes
- Engineering(all)
Cite this
Vitek, J. M., Babu, S. S., Park, J. W., & David, S. A. (2004). Stray grain formation in nickel-base superalloy single-crystal welds. In M. Rappaz, C. Beckermann, & R. Trivedi (Eds.), Solidification Processes and Microstructures: A Symposium in Honor of Wilfried Kurz (pp. 61-66). (Solidification Processes and Microstructures: A Symposium in Honor of Wilfried Kurz).