Abstract
Presented here are results and discussion for weldability testing on Alloy C-22 weld-metal. The Transvarestraint test was used to determine the solidification cracking susceptibility of the alloy; results indicate that Alloy C-22 is resistant to solidification cracking. The STF test demonstrated that Alloy C-22 weld metal is susceptible to ductility-dip-cracking (DDC); no recovery of cracking resistance was observed at the upper end of the testing temperature range. The hot-ductility test revealed intermediate temperature ductility dips in the ductility signature of Alloy C-22. These solid-state cracking results were surprising considering the fact that Alloy C-22 is known throughout industry to be a very weldable alloy. Discussions are presented regarding the low threshold strain of the alloy, the unique manner in which the alloy does not recover cracking resistance at the upper end of the testing temperature range, and methods through which the elevated temperature ductility of the alloy might be improved.
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Acknowledgments
The authors would like to thank AWS and The Ohio State University for providing financial support of this project. Additionally, gratitude is extended to all members of the Welding and Joining Metallurgy Group and the faculty of the Welding Engineering department at OSU who helped during the course of this work. Thanks also to Haynes International for provision of the base-material used within this investigation.
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Gallagher, M.L., Lippold, J. (2011). Weld Cracking Susceptibility of Alloy C-22 Weld-Metal. In: Böllinghaus, T., Lippold, J., Cross, C. (eds) Hot Cracking Phenomena in Welds III. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-16864-2_19
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DOI: https://doi.org/10.1007/978-3-642-16864-2_19
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