TY - GEN
T1 - Cracking behavior in nickel-based single crystal superalloy welds
AU - Vitek, J. M.
AU - Babu, S. S.
AU - David, S. A.
AU - Park, J. W.
AU - Hu, Y.
AU - Hehmann, W.
PY - 2005
Y1 - 2005
N2 - 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.
AB - 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.
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M3 - Conference contribution
AN - SCOPUS:33751534553
SN - 0871708426
SN - 9780871708427
T3 - ASM Proceedings of the International Conference: Trends in Welding Research
SP - 333
EP - 338
BT - Trends in Welding Research - Proceedings of the 7th International Conference
T2 - 7th International Conference on Trends in Welding Research
Y2 - 16 May 2005 through 20 May 2005
ER -