Spinodal decomposition mechanism study on the duplex stainless steel UNS S31803 using ultrasonic speed measurements |
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| Authors: | Victor Hugo C. de Albuquerque,Edgard de Macedo Silva,Josinaldo Pereira Leite,Elineudo Pinho de Moura,Vera Lú cia de Araú jo Freitas,Joã o Manuel R.S. Tavares |
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| Affiliation: | 1. Universidade de Fortaleza (UNIFOR), Centro de Ciências Tecnológicas (CCT), Núcleo de Pesquisas Tecnológicas (NPT), Av. Washington Soares, 1321, Sala NPT/CCT, CEP 60.811-905, Edson Queiroz, Fortaleza, Ceará, Brazil;2. Universidade Federal da Paraíba (UFPB), Departamento de Engenharia Mecânica (DEM), Cidade Universitária, S/N, 58059-900 João Pessoa/PB, Brazil;3. Centro federal de Educação Tecnológica da Paraíba (CEFET PB), Área da Indústria, Avenida 1° de Maio, 720, 58015-430 João Pessoa/PB, Brazil;4. Universidade Federal do Ceará (UFC), Departamento de Engenharia Metalúrgica e de Materiais, Campus do Pici, Bloco 715, 60455-760 Fortaleza/CE, Brazil;5. Universidade Federal de Campina Grande (UFCG), Departamento de Engenharia Mecânica (DEM), Av. Aprígio Veloso, 882, Bodocongó 58109-970, Campina Grande-PB, Brazil;6. Faculdade de Engenharia da Universidade do Porto (FEUP), Departamento de Engenharia Mecânica (DEMec) / Instituto de Engenharia Mecânica e Gestão Industrial (INEGI), Rua Dr. Roberto Frias, S/N - 4200-465 Porto, Portugal |
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| Abstract: | This work, focuses on the spinodal decomposition mechanism study on the duplex stainless steel duplex UNS S31803, composed by austenite (γ) and ferrite (α) phases, at 425 °C and 475 °C temperatures by ultrasonic speed measurements. This temperature range is responsible for the transformation mechanism of αinitial phase to α phases (poor in chromium) and α′ (rich in chromium) by spinodal decomposition. The techniques to accomplish this analysis are based mainly on X-ray diffraction measures and ultrasonic speed. The obtained results show that it is possible to conclude that the use of ultrasonic speed measurements indicates a promising technique for following-up the phase transformation and spinodal decomposition on the steel studied. |
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