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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

High Strength AA7050 Al alloy processed by ECAP: Microstructure and mechanical properties

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Author(s):
Cardoso, K. R. [1, 2] ; Travessa, D. N. [1] ; Botta, W. J. [3] ; Jorge, Jr., A. M. [3]
Total Authors: 4
Affiliation:
[1] Univ Fed Sao Paulo, DCT, BR-12231280 Sao Paulo - Brazil
[2] Univ Vale do Paraiba, Inst Pesquisa & Desenvolvimento, BR-12244000 Sao Paulo - Brazil
[3] Univ Fed Sao Carlos, Dept Mat Engn, BR-13565905 Sao Paulo - Brazil
Total Affiliations: 3
Document type: Journal article
Source: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING; v. 528, n. 18, p. 5804-5811, JUL 15 2011.
Web of Science Citations: 42
Abstract

Commercial AA7050 aluminium alloy in the solution heat-treated condition was processed by ECAP through routes A and B(C). Samples were processed in both room temperature and 150 degrees C, with 1, 3, and 6 passes. The resulting microstructure was evaluated by optical microscopy (OM) and transmission electron microscopy (TEM). Only one pass was possible at room temperature due to the low ductility of the alloy under this condition. In all cases, the microstructure was refined by the formation of deformation bands, with dislocation cells and subgrains inside these bands. The increase of the ECAP temperature led to the formation of more defined subgrain boundaries and intense precipitation of spherical-like particles, identified as eta' and eta phases. After the first pass, an increase in the hardness was observed, when compared with the initial condition. After 3 passes the hardness reached a maximum value, higher than the values typically observed for this alloy in the overaged condition. The samples processed by route B(C) evolved to a more refined microstructure. ECAP also resulted in significant strength improvement, compared to the alloy in the commercial overaged condition. (C) 2011 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 05/03440-5 - Processing of aluminium alloys by equal channel angular pressing - ECAP
Grantee:Kátia Regina Cardoso
Support Opportunities: Regular Research Grants