Crystallographic orientation-spray formed hypereutectic aluminium-silicon alloys

Materials Research

Hamilta De Oliveira Santos¹  Marilene Morelli Serna¹  Nelson Batista De Lima¹  Isolda Costa¹  Jesualdo Luiz Rossi¹ 

[1] ,Instituto de Pesquisas Energéticas e Nucleares CNEN São Paulo,Brazil

关键词: spray forming;    cylinder liners;    Al-Si hypereutectic alloys;   

DOI  :  10.1590/S1516-14392005000200017

来源: SciELO

【 摘 要 】

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.

【 授权许可】

CC BY   
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