|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Deformation and Damage Mechanisms in High Temperature Ni, Co and Fe-based Superalloys
||Assessment of the Remaining Creep Life for DZ125 Superalloy Based on Microstructural Degradation
||Chao Fu, Yadong Chen, Qiang Feng
|On-Site Speaker (Planned)
Estimating the remaining creep life of alloys is an effective way to ensure the service safety of high temperature structural components. However, the lack of considering the microstructure degradation during creep restricts the reliability and accuracy for the prediction model. In this study, thermal and temperature-stress coupling simulations in the directionally-solidified superalloy DZ125 were carried out during 900~1100 ºC for 100 to 1200h. The microstructural evolution mechanism was investigated by quantitative characterization of microstructural parameters, including γ′ volume fraction, γ′ rafting degree and thickness of rafted γ′ phase. Further, artificial neural networks (ANN) was used to establish the relationship among microstructure parameters, creep conditions, and the ANN model was also developed to predict the remaining creep life based on the microstructural evolution. This model will be helpful for assessing the service condition and the remaining service life of DZ125 turbine blades.
||Planned: Supplemental Proceedings volume