| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Response of Materials Investigated Through Novel In-Situ Experiments and Modeling
|
| Presentation Title |
Tensile deformation behavior of polycrystalline pure cobalt with HCP / FCC dual phase studied by in-situ X-ray diffraction |
| Author(s) |
Takumi Suzumura, Si Gao, Shuhei Yoshida, Nobuhiro Tsuji |
| On-Site Speaker (Planned) |
Takumi Suzumura |
| Abstract Scope |
Pure cobalt exhibits an HCP structure at room temperature. However, in polycrystalline pure cobalt, small amount of high temperature FCC phase has been always found to retain at room temperature, which could transform to HCP phase upon subsequent deformation. In this study, in-situ synchrotron X-ray diffraction during tensile tests were conducted on a polycrystalline pure cobalt having HCP matrix phase and small amounts of retained FCC phase to investigate the role of FCC to HCP transformation on the deformation behavior. It was found that the internal stress of the HCP phase was higher than that of the FCC phase and estimated work hardening rates of each phase were lower than the global one. This suggests that the global work hardening rate was enhanced by the phase transformation from softer FCC to harder HCP phase. The detailed analysis on the diffraction profiles and microstructure evolution will be discussed in the presentation. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Phase Transformations, Copper / Nickel / Cobalt |