ResumoNesse estudo foi fabricada uma matriz hipoeutética de Al-2%Ni e adicionado nela a concentração 1,0 % de nanotubos de carbono de paredes múltiplas (NTCPM). A fabricação do material estudado aconteceu por fundição e resfriamento unidirecional brusco originando grãos predominantemente colunares. Os ensaios mecânicos mostram que concentrações maiores de nanotubo na matriz provocam acréscimo na propriedade mecânica e que em áreas mais distante da base extratora de calor a microdureza aumenta. As curvas de tensão-deformação, para os materiais estudados, evidenciaram que o acréscimo de 1% NTC na liga de Al-2%Ni teve como resultado, uma alta deformação plástica. No entanto, o endurecimento do material não afetou o aumento da resistência à tração. Palavras-chave: Propriedade mecânica; Nanotubos de Carbono de Paredes Múltiplas; Fundição; Solidificação unidirecional.
MACROSTRUCTURAL AND MECHANICAL ANALYSIS OF A HYPOEUTECTOID ALLOY AL-2%Ni WITH THE ADDITION OF 1% OF CARBON NANOTUBES AbstractIn this article it was manufactured a hypoeutectoid matrix of Al-2%Ni and added on it the concentration 1.0% of multiple-walled carbon nanotubes (MWCNT). The manufacturing of the studied material was done by casting and sudden unidirectional cooling originating predominantly columnar grains. Mechanical tests show that higher nanotube concentrations in the matrix causes increase in mechanical properties and that, in more distant areas of the health extraction base, the microhardness increases. The stress-strain curves in the materials studied show that the addition of 1% CNT in a Al-2%Ni alloy had as a result a high plastic deformation. However, the hardening of the material did not affect the increase in tensile strength.
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