Szczegóły publikacji
Opis bibliograficzny
Effects of extrusion parameters by KoBo method on the mechanical properties and microstructure of aluminum — Wpływ parametrów wyciskania metodą KoBo na własności mechaniczne i strukturę aluminium / K. PIEŁA, L. BŁAŻ, M. JASKOWSKI // Archives of Metallurgy and Materials / Polish Academy of Sciences. Committee of Metallurgy. Institute of Metallurgy and Materials Science ; ISSN 1733-3490. — 2013 — vol. 58 iss. 3, s. 683–689. — Bibliogr. s. 688–689
Autorzy (3)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 75396 |
|---|---|
| Data dodania do BaDAP | 2013-09-07 |
| DOI | 10.2478/amm-2013-0055 |
| Rok publikacji | 2013 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Archives of Metallurgy and Materials |
Abstract
Commercial purity aluminum was extruded by means of KoBo method at varied processing parameters. Received extrudates, with different mechanical and electrical properties and work hardening behavior, were obtained. It was found, that some conditions of KoBo extrusion process such as low initial billet temperature, low extrusion rate and low frequency of oscillating die lead to extremely high strength and high electrical resistivity of the material. The absence of work hardening (up to 40% strain) during subsequent groove rolling is also a specific feature of received materials. It was suggested that mentioned features are related to the development of overbalance concentration of point defects (clusters) generated during the extrusion process. During following cold rolling of the extrudate, mentioned defects annihilate at gliding dislocations and make the dislocation climbing and their rearrangement easier. Therefore, until the exhaustion of this mechanism, the hardening of material during cold rolling is very limited. Following increase of the material strengthening at higher rolling strains point to the return of the material to its typical behavior observed for cold deformed aluminum produced by conventional hot extrusion.
