|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Phase Transformations and Microstructural Evolution
||Decoupling of Strain and Temperature Effects on Microstructural Evolution during High Shear Strain Deformation
||Anqi Yu, Julian Escobar Atehortua, Krassimir Bozhilov, Jia Liu, Mayur Pole, Joshua A Silverstein, Sundeep Mukherjee, Suveen Mathaudhu, Arun Devaraj, Bharat Gwalani
|On-Site Speaker (Planned)
While solid phase processing is widely used for advanced materials manufacturing, the effects of strain and the local heating due to process remain implicit. To decouple the effects of shear-strain and temperature, we used a pin-on-disk tribometer to study subsurface microstructural changes in a Cu-Nb binary system under shearing at various temperatures. First, to minimize the frictional heating at the contact surface, low sliding load and velocity were used at room temperature to eliminate the influence of thermal activation during shear induced deformation. Then, external heating was applied during the tribological process to elucidate the coupled effect of shear and temperature.
The phase specific strain accommodation as a function of total strain and temperature were characterized using orientation microscopy and transmission electron microscopy, while the compositional changes due to forced mixing were captured using atom probe tomography to understand the transformation pathway during this high strain process.
||Other, Other, Other