Título:	Influence of the deep cryogenic treatment at the stabilization of martensitic transformation temperatures at the smart material alloy Cu-14Al-4Ni
Autor(es):	Nava, Marcelo Lima, Emmanuel Pacheco Rocha Lima, Pedro Cunha de
Assunto:	Tratamento criogênico Metais - tratamento térmico Ligas com memória de forma Ligas (Metalurgia)
Data de publicação:	2020
Editora:	David Publishing Company
Referência:	NAVA, Marcelo; LIMA, Emmanuel Pacheco Rocha; LIMA, Pedro Cunha de. Influence of the deep cryogenic treatment at the stabilization of martensitic transformation temperatures at the smart material alloy Cu-14Al-4Ni. Journal of Materials Science and Engineering, A 10, n. 3-4, p. 60-64, 2020. DOI: 10.17265/2161-6213/2020.3-4.003. Disponível em: http://www.davidpublisher.org/index.php/Home/Article/index?id=43325.html. Acesso em: 22 de jun. 2020.
Abstract:	DCT (deep cryogenic treatment) is commonly used in industry to improve the wear resistance characteristics of steels, especially. However, there are just a few researches about the effects on non-ferrous metals. The purpose of this work was to investigate how DCT affects the properties of Cu-14Al-4Ni alloy treated at different soak time and submitted to thermomechanical cycling. A comparative experimental analysis was performed of the thermal properties of alloys obtained on a vacuum furnace, treated by DCT and thermomechanically cyclized. The results indicates that thermomechanical cycling promoted the appearance and growth of the martensitic phase γ'1, less ductile than the martensitic phase β'1, which together with the induced hardening produced an increase in transformation temperatures and microhardness. The higher the number of cycles, the greater these effects. The DCT promoted an increase in the intensity of the diffraction peaks corresponding to the phase β'1 and the maintenance of them during the thermomechanical cycling of the material, which indicates that the DCT stabilizes the martensitic phase β'1 and, consequently, caused a reduction and stabilization of the martensitic transformation temperatures and the microhardness, when compared to the untreated material. The longer the soaking time of DCT, the greater these effects.
Unidade Acadêmica:	Faculdade de Ciências e Tecnologias em Engenharia (FCTE) – Campus UnB Gama
Licença:	Autorização concedida à Biblioteca Central da Universidade de Brasília pelo Professor Emmanuel Pacheco Rocha Lima, em 19 de junho de 2020, para disponibilizar a obra, gratuitamente, para fins acadêmicos e não comerciais (leitura, impressão e/ou download), a partir desta data. A obra continua protegida por Direito Autoral e/ou por outras leis aplicáveis. Qualquer uso da obra que não o autorizado sob esta licença ou pela legislação autoral é proibido.
DOI:	10.17265/2161-6213/2020.3-4.003
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