Szczegóły publikacji
Opis bibliograficzny
Lüders deformation and superplastic flow of metals extruded by KOBO method / Andrzej KORBEL, Włodzimierz BOCHNIAK // Philosophical Magazine ; ISSN 1478-6435. — 2013 — vol. 93 no. 15, s. 1883–1913. — Bibliogr. s. 1911–1913
Autorzy (2)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 77448 |
|---|---|
| Data dodania do BaDAP | 2013-11-12 |
| Tekst źródłowy | URL |
| DOI | 10.1080/14786435.2013.765977 |
| Rok publikacji | 2013 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Philosophical Magazine |
Abstract
The work brings the results of the study on mechanical properties of some metallic materials subjected to very large plastic deformation by KOBO extrusion. The unexpected features of the KOBO products like Luders deformation in pure metals and superplastic flow in coarse grain materials are discussed in terms of micro- and nano-scale elements of their structure. The choice to the experiment materials having different crystallographic and phase structure (commercial purity aluminium, multiphase aluminium 7075 alloy, pure zinc and multiphase magnesium AZ91 alloy) and different history (extrusion, casting) allowed to identify the common nano-size elements of the structure generated during the KOBO deformation which seems to be responsible for the mechanical behaviour of these materials. In particular, clusters of point defects (self-interstitials) formed under the KOBO extrusion conditions (cyclic change in the deformation path, high hydrostatic pressure) were found in these materials regardless of grain size and material early history. They correlate with appearance of unstable Luders-like or even PortevinLeChatelier deformation at ambient and superplastic flow at elevated temperatures.
