C. Robino, Sandia National Laboratory, Albuquerque, NM; J. DuPont, Lehigh University, Bethlehem, PA; Z. Feng, Oak Ridge National Laboratory, Oak Ridge, TN; M. Reece, G. A. Knorovsky, Sandia National Laboratories, Albuquerque, NM

Summary: Video observations of Varestraint tests provide criteria defining the events controlling crack length. Coupling these criteria with strain, temperature, and solidification models allows for direct predictions of crack length. Crack length for Nb-containing superalloys was estimated, and comparison with experiment showed that cracking susceptibility and crack lengths were reasonably estimated.