Heterogenous activation of dynamic recrystallization and twinning during friction stir processing of a Cu-4Nb alloy
Research output: Journal contributions › Journal articles › Research › peer-review
Authors
An interplay between high degree of shear deformation and deformation-induced heating occurs during friction stir processing (FSP) of metals. In medium-to-low stacking fault energy Cu alloys, this can lead to a complex spatially heterogenous activation of dynamic recrystallization (DRX) and twinning mechanisms. Within the Cu-Nb system, the presence of Nb is further expected to influence the DRX mechanism of the Cu matrix. However, the microstructural changes induced by the co-deformation of Nb during FSP are still not well understood. Therefore, this study uses a combination of multimodal microstructural characterization, solution thermodynamics-based predictions, and computational crystal plasticity simulation to reveal the various microstructural evolution mechanisms that can occur during FSP of a Cu-4at.%Nb binary model alloy. The formation of softer DRX zones, and harder shear localization regions are revealed using electron backscatter diffraction, transmission electron microscopy, atom probe tomography, and crystal plasticity modeling.
| Original language | English | 
|---|---|
| Article number | 167007 | 
| Journal | Journal of Alloys and Compounds | 
| Volume | 928 | 
| Number of pages | 9 | 
| ISSN | 0925-8388 | 
| DOIs | |
| Publication status | Published - 20.12.2022 | 
Bibliographical note
Publisher Copyright:
© 2022
- Engineering
 - dynamic recrystallization, twinning, friction stir processing, copper-niobium, Copper-niobium, Twinning, Dynamic recrystallization, Friction stir processing
 
Research areas
- Mechanical Engineering
 - Metals and Alloys
 - Mechanics of Materials
 - Materials Chemistry
 
