Engenharia Mecânica

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http://repositorio.ufes.br/handle/10/17620
Programa de Pós-Graduação em Engenharia Mecânica

Centro: CT
Telefone: (27) 4009 2116
URL do programa: http://www.engenhariamecanica.ufes.br/pos-graduacao/PPGEM

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Navegando Engenharia Mecânica por Autor "Almeida, Elton Mesquita de"

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    EFEITO DO TRATAMENTO TÉRMICO NAS PROPRIEDADES MAGNÉTICAS E NA CORROSÃO LOCALIZADA DO AÇO INOXIDÁVEL DUPLEX UNS 31803
    (Universidade Federal do Espírito Santo, 2021-06-25) Almeida, Elton Mesquita de; Macêdo, Marcelo Camargo Severo de; https://orcid.org/0000-0002-2206-6081; http://lattes.cnpq.br/5530638975120211; https://orcid.org/0000-0001-9490-0509; http://lattes.cnpq.br/3045774687693605; Pardal, Juan Manuel; https://orcid.org/0000-0001-9625-4547; http://lattes.cnpq.br/3583921436364162; Luz, Temístocles de Sousa; https://orcid.org/0000-0001-7424-2457; http://lattes.cnpq.br/4392077368620764; Tavares, Sérgio Souto Maior; https://orcid.org/0000-0003-1698-8634; http://lattes.cnpq.br/4320367144812616
    This study evaluated duplex stainless steel UNS 31803 degradation by DL-EPR test and magnetic properties measurement of material. For these the samples were heat treated at 800C for 10, 120 and 240 minutes beside the sample under the condition as received. These treated resulted in the precipitation of deleterious phases and paramagnetic phases. DL-EPR test had been made in 2M H2SO4 + 1M HCL solution using sweep rate 1,67 mV/s for the purpose quantify sensitization degree. Had been made measurement of Barkhausen magnetic noise, noise RMS, Peak, Remanence, Coercivity, Magnetic flux density in the saturation, and besides that had been got magnetic hysteresis curve of material for each condition to explore the equipament used and observe the magnetic changes cause material degradation due heat treated. The material suffered a considerable change in the propotion ferrite-austenite due heat treated. Thus DL-EPR resuts was able measure sensitization degree in each condition, besides that, the Barkhausen magnetic noise, RMS, remanence and magnetic flux density showed good correlations with change of ferrite volumetric percentage showing promising analyzes in the study material degradation.