|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Advanced Thermo-mechanical Characterization of Materials with Special Emphasis on In Situ Techniques
||Extraction of Crystal Plasticity Parameters of IN718 Using High Temperature Microcompression
||Bin Gan, Aitor Cruzado, Marcos Jiménez, Koldo Ostolaza, Arantza Linaza, Javier Segurado, Javier Lloca, Jon Molina
|On-Site Speaker (Planned)
Ni-based superalloys are widely utilized in structural applications in aeroengine, owing to their exceptional mechanical properties in corrosive and oxidizing environments. In the present investigation, site-specific micropillars with the diameter varying from 1 um to 18 um were milled out by Focused Ion Beam from a polycrystalline IN718 superalloy specimen and then measured with high temperature micro-compression techniques up to 575 ºC. The effects of pillar size, pillar orientation, strain rate and temperatures were quantitatively assessed. The different hardening behavior for single-slip, co-planar, non co-planar double slip and multiple-slip conditions were investigated. The testing results were used to determine the crystal plasticity parameters of a phenomenological crystal plasticity (CP) model of IN718 superalloy that were then used in a polycrystalline finite element model of this alloy. This new model was able to predict, without fitting any parameter, the experimental macroscopic compression test with an error below 5%.
||Planned: Supplemental Proceedings volume