| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Ultrafine-grained and Heterostructured Materials (UFGH XI)
|
| Presentation Title |
Strain Partitioning by Recurrent Shear Localization during Equal-channel Angular Pressing |
| Author(s) |
Philipp Frint, Martin F.-X. Wagner |
| On-Site Speaker (Planned) |
Philipp Frint |
| Abstract Scope |
We report on recurrent shear localization by formation of alternating shear and matrix bands during ECAP of AA6060. The strain partitioning process is documented by analyzing the deformation of a grid of indents and the corresponding flow lines. Interestingly, shear strains of ~3.6 in the shear bands considerably exceed the maximum shear strain achievable in a single ECAP pass, whereas much lower strains occur in the matrix bands. EBSD analyses document the different stages of microstructural evolution in shear and matrix bands and confirm the pronounced differences associated with the novel strain partitioning process. An analysis of texture evolution for billets with different orientations with respect to the initial extrusion direction demonstrates the importance that texture softening plays in triggering shear localization. Shear banding is often interpreted as a mechanisms of failure and cracking; the present study highlights that strain partitioning facilitates the fabrication of bulk laminated materials by ECAP. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume |