Cracking behavior in nickel-based single crystal superalloy welds

J. M. Vitek, S. S. Babu, S. A. David, J. W. Park, Y. Hu, W. Hehmann

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)


The cracking behavior in single crystal nickel-based superalloy welds was studied. A laser powder deposition process was used with Rene N5 base metal and three different filler metal alloys: IN625, IN738 and MarM247. Two different welding configurations were examined. In the first, a clad layer was deposited on the surface of the base metal. In the second, a U-groove was machined and filled with one of the filler metals. The paper details the extent of cracking as a function of filler metal alloy and weld geometry. Cracking was minimal in the clad geometry but was significant in the U-groove geometry. Cracking was worst with the MarM247 filler metal. Cracking was along stray grain high-angle boundaries and metallography revealed a one-to-one correlation between the extent of cracking and the propensity to form stray grains.

Original languageEnglish
Title of host publicationTrends in Welding Research - Proceedings of the 7th International Conference
Number of pages6
Publication statusPublished - 2005
Event7th International Conference on Trends in Welding Research - Pine Mountain, GA, United States
Duration: 2005 May 162005 May 20

Publication series

NameASM Proceedings of the International Conference: Trends in Welding Research


Other7th International Conference on Trends in Welding Research
Country/TerritoryUnited States
CityPine Mountain, GA

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanical Engineering


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