Microstructural evolution of AA7050 al alloy processed by ECAP

Autor(es)

Cardoso, E. K. ^[1] ; Guido, V. ^[1] ; Silva, G. ^[1] ; Botta Filho, W. ^[2] ; Jorge Junior, A. ^[2]

Afiliação do(s) autor(es)

^[1] UNIVAP, Sao Jose Dos Campos - Brazil

^[2] Univ Fed Sao Carlos, Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: MATERIA-RIO DE JANEIRO; v. 15, n. 2, p. 325-333, 2010.
• Citações Web of Science: 0

Resumo

This work aimed to study the microstructural evolution of commercial aluminum alloy AA7050 in the solution treated condition (W) processed by equal channel angular pressing - ECAP. The analyses were made considering the effects of process parameters as temperature (Tamb and 150°C), processing route (A and B C) and number of passes. Optical microscopy (OM), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used for microstructural characterization, and hardness tests for a preliminary assessment of mechanical properties. The results show that the refining of the microstructure by ECAP occurred by the formation of deformation bands, with the formation of dislocations cells and subgrains within these bands. The increase of the ECAP temperature led to the formation of more defined subgrains contours and intense precipitation of η phase in the form of spherical particles. The samples processed by Route B C present a more refined microstructure. (AU)

• Processo FAPESP: 05/03440-5 - Processamento de ligas de alumínio por prensagem angular de seção transversal constante - ECAP
• Beneficiário: Kátia Regina Cardoso
• Modalidade de apoio: Auxílio à Pesquisa - Regular