[Kovove materialy - Metallic materials]
    Fri - March 29, 2024 - 16:28 No. of hits : 1736719 ISSN 1338-4252 (online) ISSN 0023-432X (printed)
© Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Bratislava, Slovak Republic

VOLUME 45 (2007), Issue 3

Superplasticity in a Zr and Sc modified AA7075 aluminium alloy produced by ECAP
TURBA, K., MALEK, P., CIESLAR, M.
vol. 45 (2007), no. 3, pp. 165 - 170

Abstract
A sub-micrometer grain size was introduced to a Zr and Sc modified AA7075 aluminium alloy using the method of equal-channel angular pressing. Room temperature tensile tests together with microhardness measurements revealed that the refinement of the microstructure had been accompanied by a substantial increase in room temperature strength. The acquired microhardness values were also used to determine the deformation dead zone within the ECAP billet. TEM observations documented a reasonable stability of the microstructure up to the temperature of 623 K. At this temperature, the material exhibited high strain rate superplasticity with an elongation to failure of 520 %.

Key words
ultra-fine grained Al alloys, ECAP, high strain rate superplasticity

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Full title of this journal is bilingual: Kovové materiály - Metallic Materials.
The official abbreviation in accordance with JCR ISI is Kovove Mater.


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