Determinação das propriedades termomecânicas de ligas Cu-Al-Ni e Cu-Al-Be com efeito memória de forma para utilização como atuadores mecânicos

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

Cu-Al-Ni and Cu-Al-Be shape memory alloys were cast under ambient atmosphere, and characterized thought optical microscopy, X-ray diffraction, and differential scanning calorimetry. Superelasticity, and shape recovery were evaluated using mechanical tensile test. Thermomechanical properties of shape memory alloys used were obtained under different temperature range, in which was possible to conclude that Cu-Al-Ni alloy can be used as mechanical actuators for temperatures above 90C, as well as this alloy in particular should not be considered for application in temperatures below 30C. Differently of CuAlBe alloy that can be used in low temperatures, as well as in temperature superiors to 0C, as, for example, mechanical actuators.

ASSUNTO(S)

propriedades termomecânicas engenharia mecanica superelasticdade recuperação de forma shape recovery thermomechanical properties superelasticity

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