Szczegóły publikacji
Opis bibliograficzny
Lüders effect in Al 99.7% extruded via the KoBo method / Adelajda Weronika BRZOSTOWICZ, Marcin JASKOWSKI, Włodzimierz BOCHNIAK, Krzysztof PIEŁA, Andrzej Brzostowicz // International Journal of Materials Research ; ISSN 1862-5282. — Tytuł poprz.: Zeitschrift für Metallkunde. — 2014 — vol. 105 iss. 9, s. 894–899. — Bibliogr. s. 899
Autorzy (5)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 84380 |
|---|---|
| Data dodania do BaDAP | 2014-09-26 |
| DOI | 10.3139/146.111094 |
| Rok publikacji | 2014 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | International Journal of Materials Research |
Abstract
The aim was to determine the effect of extrusion process parameters of the KoBo method (initial billet temperature, extrusion rate and die oscillation frequency) on the Luders phenomenon occurrence in aluminum wires. The material used in the experiment was 99.7 % pure Al billet. The extrusion was carried out with the following parameters: extrusion ratio lambda = 100, initial billet temperature in the range of 293-493 K, extrusion rate of 0.1 - 0.5 mm . s(-1) and frequencies of 3, 5 and 8 Hz (the die oscillation angle was a constant +/- 8 degrees). Output materials were mechanically tested and examined microscopically. Based on the results it was found that: the Luders phenomenon in aluminum wires extruded by the KoBo method appears only i) in a specific range of the extrusion force, namely 450-650 kN, ii) a specific range of, yielding strength (100-140 MPa), iii) dependent on the combination of process parameters its extent and position can vary over a product's length, iv) tests have also shown that this phenomenon has a continuous propagation nature only at the initial stage of the tensile test.
