Abstract
Effects of temperature and crystallographic orientation on tensile and cyclic viscoplastic behavior of a nickel-base directionally solidified superalloy, DZ125, have been experimentally investigated and modeled using a unified anisotropic viscoplastic constitutive model. This constitutive model is compiled as an ABAQUS/UMAT by the self-adaptive explicit integration scheme. A grouping optimization method is proposed to identify the material parameters. The results show that the unified viscoplastic constitutive model is able to characterize the rate-dependent anisotropic tensile and cyclic viscoplastic behavior of DZ125 superalloy and the simulation results are in good agreement with the experimental data.
| Original language | English |
|---|---|
| Pages (from-to) | 966-978 |
| Number of pages | 13 |
| Journal | Materials and Design |
| Volume | 55 |
| DOIs | |
| State | Published - Mar 2014 |
Keywords
- Anisotropy
- Constitutive model
- Cyclic viscoplastic
- Directionally solidified
- Rate-dependent
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