Abstract
The formation of stray grains during weld solidification of Rene N5, a single-crystal nickel-based superalloy, was studied. Experimental laser and electron-beam welds showed the extent of stray grain formation was sensitive to the welding conditions. It was also found that cracking is associated with the presence of stray grains, and cracks follow along the stray-grain high angle boundaries. Modeling was carried out to investigate the mechanism of stray grain formation and to predict the extent of stray grains as a function of welding conditions and location within the weld. The effect of crystallographic orientation was also taken into account. It was found that the mechanism of constitutional supercooling for stray grain formation explained all of the experimental results. Modeling based on this mechanism indicated that welding conditions would have a very important influence on the extent of stray grain formation while crystallographic orientation had only a minor influence.
Original language | English |
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Pages | 459-465 |
Number of pages | 7 |
DOIs | |
Publication status | Published - 2004 |
Event | SUPERALLOYS 2004 - Tenth International Symposium on Superalloys - Champion, PA, United States Duration: 2004 Sep 19 → 2004 Sep 23 |
Other
Other | SUPERALLOYS 2004 - Tenth International Symposium on Superalloys |
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Country/Territory | United States |
City | Champion, PA |
Period | 04/9/19 → 04/9/23 |
All Science Journal Classification (ASJC) codes
- Materials Science(all)