Abstract
The results of twist extrusion studying for Ti and its alloys are presented. By means of optical microscopy showed that the cross section of samples, as a rule, has a characteristic macrostructure with the structural elements, elongated in the direction of vortex centered on the axis of extrusion. In the longitudinal section of samples macrostructure resembles turbulent flow of liquid. The microstructure after multiple twist extrusion characterized by submicron dimensions and large-angle boundaries. Specified structure ensures the billets, treated by twist extrusion, a high strength and ductility. Despite the strain heterogeneity in one pass, multipass twist extrusion leads to a homogeneous structure and properties on the cross section of a sample. This is conditioned by mixing of a metal during twist extrusion, the structure stabilization and saturation of mechanical properties under simple shear.
| Original language | English |
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| Title of host publication | Ti 2011 - Proceedings of the 12th World Conference on Titanium |
| Place of Publication | Beijing |
| Pages | 2020-2023 |
| Number of pages | 4 |
| Volume | 3 |
| Publication status | Published - 2012 |
| Externally published | Yes |
| Event | 12th World Conference on Titanium, Ti 2011 - Beijing, China Duration: 19 Jun 2011 → 24 Jun 2011 |
Conference
| Conference | 12th World Conference on Titanium, Ti 2011 |
|---|---|
| Country/Territory | China |
| City | Beijing |
| Period | 19/06/11 → 24/06/11 |
Keywords
- severe plastic deformation
- twist extrusion
- ultrafine grained materials