The dislocation structure changes of Ni-based single crystal superalloy in the heat affected zone were investigated. X-ray Laue diffraction and electron microscopy show that alternating dislocations slip systems dominate in the HAZ. The orientation at each position of the crystal was precisely determined by an automated indexing program. The results show that the maximum value of the thermal gradient is observed in the heat affected zone near the fusion line.
Bibliographical noteFunding Information:
The research was sponsored by the Division of Materials Sciences and Engineering, Office of Basic Energy Sciences, US Department of Energy, under Contract No. DE-AC05-00OR22725 with UT-Battelle, LLC. The authors thank Dr. H. Harada of National Institute of Materials Sciences, Tsukuba, Japan for providing the samples used in the analysis.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)