Crystallographic orientation-spray formed hypereutectic aluminium-silicon alloys

Author(s)

Hamilta de Oliveira Santos ^[1] ; Marilene Morelli Serna ^[2] ; Nelson Batista de Lima ^[3] ; Isolda Costa ^[4] ; Jesualdo Luiz Rossi ^[5]

Affiliation

^[1] Instituto de Pesquisas Energéticas e Nucleares. CNEN - Brasil

^[2] Instituto de Pesquisas Energéticas e Nucleares. CNEN - Brasil

^[3] Instituto de Pesquisas Energéticas e Nucleares. CNEN - Brasil

^[4] Instituto de Pesquisas Energéticas e Nucleares. CNEN - Brasil

^[5] Instituto de Pesquisas Energéticas e Nucleares. CNEN - Brasil

• Document type: Journal article
• Source: MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS; v. 8, n. 2, p. 181-186, 2005-06-00.

Abstract

Aluminium-silicon alloys have been wide accepted in the automotive, electric and aerospace industries. Preferred orientation is a very common condition for metals and alloys. Particularly, aluminium induces texture during the forming process. The preparation of an aggregate with completely random crystal orientation is a difficult task. The present work was undertaken to analyse the texture by X-ray diffraction techniques, of three spray formed hypereutectic Al-Si alloys. Samples were taken from a billet of an experimental alloy (alloy 1) and were subsequently hot-rolled and cold-rolled (height reduction), 72% and 70%, respectively. The other used samples, alloys 2 and 3, were taken from cylinders liners. The results from the Laue camera showed texture just in the axial direction of alloy 3. The pole figures also indicated the presence of a typical low intensity deformation texture, especially for alloy 3. The spray formed microstructure, which is very fine, hinders the Al-Si texture formation during mechanical work. (AU)

• FAPESP's process: 98/07529-5 - Study of the behavior of materials for automotive components in combustible environments
• Grantee: Isolda Costa
• Support Opportunities: Regular Research Grants