|About this Abstract
||MS&T23: Materials Science & Technology
||Late News Poster Session
||K-7: Numerical Analysis on the Local Deformation Behavior of the Fir Tree of Ni-based Superalloy Turbine Blade
||Tae Yang Bang, Yoon Suk Choi, Seen Chan Kim, Seong Hun Park, Han Jong Kim, Taejun Yun, Jun Young Jeon
|On-Site Speaker (Planned)
||Tae Yang Bang
Turbine blades are an essential component of aerospace and industrial turbines operating under high temperatures and stresses. Turbine blades are mechanically connected with a turbine disk and the connected part is called the fir tree. Here, the mechanical contact between the blade's fir tree and the disk causes local deformation constraints, leading to the stress and strain concentration. The present study used various constitutive models to analyze the anisotropic deformation responses near the fir tree of Ni-based superalloy turbine blade. Numerical analysis results showed that the complex geometry and contact constraints of the fir tree caused locally multi-axial stress states, and the distribution and magnitude of the local stresses differed significantly depending on the constitutive model used. In particular, the local deformation responses were sensitive to the elastic and plastic anisotropy and slip systems used. The results were systematically compared and discussed for their physical meaning.