Estudo das propriedades termomecânicas de ligas Cu-Al-Mn com memória de forma

• Ano de defesa: 2014
• Autor(a) principal: Silva, Jandemarques Alexandre Soares da
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal da Paraí­ba; BR; Engenharia Mecânica; Programa de Pós-Graduação em Engenharia Mecânica; UFPB
• Palavras-chave em Português: Ligas com efeito memória de forma; Transformação martensítica; Propriedades termomecânicas; Shape memory effects alloys; Martensitic transformation; Termomecanical properties; ENGENHARIAS::ENGENHARIA MECANICA
• Link de acesso: https://repositorio.ufpb.br/jspui/handle/tede/5374

Five different compositions of the Cu-Al-Mn shape memory alloys were cast under ambient atmosphere, and characterized thought optical microscopy, X-ray diffraction, and differential scanning calorimetry. Shape recovery and superelasticity was evaluated using mechanical tensile test, always comparing the results between them and observing the influence of manganese concentration on termomecanicals properties. Results were encountered regarding the shape recovery of approximately 5%, however, the compositions of the alloys Cu-Al-Mn analyzed have high brittleness, which should be kept to a minimum. Another favorable aspect in relation to these alloys is highly sensitive to the composition of its components, where 1 %peso increase in manganese content will reduce the Mi temperature around 60 K, which facilitates the handling of their transformation temperatures according to application needs.