|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Deformation Induced Microstructural Modification
||In Situ Analysis of Microstructural Evolution of Metallic Alloys under High Speed Rotational Shear Deformation
||Arun Devaraj, Tingkun Liu, Bharat Gwalani, Matthew Olszta, changyong Park, Stanislav Sinogeikin, Cynthia Powell, Suveen Mathaudhu
|On-Site Speaker (Planned)
In order to develop shear-based solid phase processing methods, we aim to better understand the fundamental atomic scale mechanisms of mass and energy transfer in materials under shear deformation. To achieve this aim, we developed a first of its kind synchrotron-based in situ high-energy x-ray diffraction capability using a high-speed rotational diamond anvil cell (HSRDAC). HSRDAC provided time resolved synchrotron-based XRD results on lattice strain evolution and change in spatial variation of shear deformation induced alloying in Cu-Ni alloys. These in situ results were correlated with detailed microstructural characterization before and after shear deformation using transmission electron microscopy and atom probe tomography. This HSRDAC capability can provide new insights into the unique role of shear deformation in formation of metastable states, as well as in modifying the phase transformation pathways in a wide variety of alloy systems.
||Characterization, Phase Transformations, Shaping and Forming