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Superalloys 2004 (Tenth International Symposium)
Residual stresses in the dendritic structure of single-crystal nickelbase superalloys were investigated. Dilatometric measurements showed that the thermal contraction of the dendrite arms (DAs) is larger than that of the interdendritic regions (IRs). The reason is, that the ' phase, precipitating during cooling, has a smaller lattice parameter than the -matrix and that this ' misfit is higher in the DA than in the IR. In the "DA-IR-compound" the different thermal contractions cause residualdoi:10.7449/2004/superalloys_2004_537_543 fatcat:vd7c5eea4jcn7m4aog5vqe4aja