About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Deformation-induced Microstructural Evolution during Solid Phase Processing: Experimental and Computational Studies
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Presentation Title |
Shear Deformation of Fe-Mn Alloys by High-speed Rotational Diamond Anvil Cell (HS-RDAC) |
Author(s) |
Tingkun Liu, Julian D Escobar Atehortua, Changyong Park, Arun Devaraj |
On-Site Speaker (Planned) |
Tingkun Liu |
Abstract Scope |
Under high shear strain condition, e.g., solid phase processing (SPP) that enhances diffusivity due to excess defect density and deformation induced heating, the Cottrell atmospheres (local solute environments near dislocation) in alloys could be significantly more complex than those resulting from simpler annealing. We studied the microstructural evolution of Fe-Mn alloys caused by SPP within high-speed rotational diamond anvil cell (HS-RDAC) with in-situ synchrotron X-ray diffraction. The XRD results showed changes in the phase equilibrium as well as the dynamic defect density. We also studied the deformed alloys recovered from HS-RDAC with advanced electron microscopy and atomic probe tomography (APT), which revealed changes in the Cottrell atmospheres and the grain boundary segregation due to the shear deformation. This work provides a pathway toward direct experimental understanding of the influence of strain rate and temperature on shear deformation and its effects on the Cottrell atmospheres and the grain boundary dynamics. |
Proceedings Inclusion? |
Planned: |
Keywords |
Iron and Steel, Characterization, Other |