|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Deformation and Damage Mechanisms in High Temperature Ni, Co and Fe-based Superalloys
||Role of Anisotropic Deformation on the Weld Cracking of a Directionally Solidified Ni-base Superalloy
||Avinash Prabhu, Sudarsanam Suresh Babu
|On-Site Speaker (Planned)
Directionally solidified high-gamma prime Ni-base superalloys are susceptible to cracking in the heat affected zone during fusion welding processes. In this work, conditions leading to the deformation and fracture behavior in a high gamma prime alloy are considered at a range of elevated temperatures in the longitudinal and transverse direction with respect to the grain direction. Depending on the orientation of the applied stress with reference to crystallographic texture, differing amounts of strains were found to localize in the grain interiors and the boundaries. Transverse applied stresses lead to failure at lower strain at highly misoriented grain boundaries. The measured stress-strain characteristics are used within a finite element software to evaluate the stress evolution and the cracking tendency during fusion welding. The microstructural causes of failure are characterized through a combination of SEM and EBSD.
||Planned: Supplemental Proceedings volume