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@PhDThesis{Alves:2016:CaMeEs,
               author = "Alves, Eder Paduan",
                title = "Caracteriza{\c{c}}{\~a}o mec{\^a}nica e estudo do perfil 
                         t{\'e}rmico na soldagem por fric{\c{c}}{\~a}o rotativa de 
                         materiais dissimilares",
               school = "Instituto Nacional de Pesquisas Espaciais (INPE)",
                 year = "2016",
              address = "S{\~a}o Jos{\'e} dos Campos",
                month = "2016-02-18",
             keywords = "soldagem por fric{\c{c}}{\~a}o, an{\'a}lise t{\'e}rmica, 
                         materiais dissimilares, propriedades mec{\^a}nicas, an{\'a}lise 
                         microestrutural, friction welding, thermal analysis, dissimilar 
                         materials, mechanical properties, microstructural analysis.",
             abstract = "Na busca de processos alternativos utilizados para uni{\~a}o de 
                         materiais dissimilares, destaca-se o processo de soldagem por 
                         fric{\c{c}}{\~a}o rotativa (Rotary Friction Welding), utilizado 
                         em tecnologia de ponta na ind{\'u}stria aeroespacial, 
                         aeron{\'a}utica, nuclear, b{\'e}lica e automotiva. O processo de 
                         soldagem por fric{\c{c}}{\~a}o rotativa (SFR) acontece no estado 
                         s{\'o}lido sem ocorr{\^e}ncia de fus{\~a}o entre as partes, e 
                         apresenta como principais mecanismos a difus{\~a}o e mistura 
                         mec{\^a}nica. Este trabalho tem como objetivo a 
                         caracteriza{\c{c}}{\~a}o mec{\^a}nica, microestrutural, e 
                         estudo do perfil t{\'e}rmico de jun{\c{c}}{\~o}es dissimilares 
                         envolvendo a liga de alum{\'{\i}}nio AA 6351-T6 e o a{\c{c}}o 
                         inoxid{\'a}vel AISI 304L produzidos comercialmente no Brasil, 
                         para aplica{\c{c}}{\~o}es no setor aeroespacial. 
                         Jun{\c{c}}{\~o}es dissimilares foram obtidas utilizando 
                         diferentes geometrias e caracterizadas por meio de ensaios de 
                         tra{\c{c}}{\~a}o, microdureza Vickers (HV), microscopia 
                         {\'o}ptica e eletr{\^o}nica (MEV, EDX), espectroscopia de 
                         fotoel{\'e}trons por RX (XPS), e tiveram o seu perfil 
                         t{\'e}rmico estudados a partir de trabalhos experimentais de 
                         monitoramento da temperatura em tempo real com aux{\'{\i}}lio de 
                         termoc{\^a}mera, sistemas de termopares, e modelamento 
                         anal{\'{\i}}tico 1D. Resultados dos ensaios mec{\^a}nicos 
                         mostraram a grande efici{\^e}ncia do processo na 
                         fabrica{\c{c}}{\~a}o de jun{\c{c}}{\~o}es dissimilares 
                         estruturais para aplica{\c{c}}{\~o}es na engenharia. 
                         Jun{\c{c}}{\~o}es produzidas a partir de pinos com geometria 
                         c{\^o}nica apresentaram maior resist{\^e}ncia mec{\^a}nica em 
                         todos os testes realizados. Nas an{\'a}lises microestruturais e 
                         por XPS ficou caracterizada a interdifus{\~a}o entre os 
                         principais elementos presentes nos materiais envolvidos no 
                         processo. Amostras de jun{\c{c}}{\~o}es que tiveram a ruptura na 
                         interface de liga{\c{c}}{\~a}o foram analisadas e verificou-se 
                         que porcentagens elevadas de Fe combinadas a baixas porcentagens 
                         de Ni, melhoram a resist{\^e}ncia mec{\^a}nica da 
                         jun{\c{c}}{\~a}o. O uso de termoc{\^a}mera e sistema de 
                         termopares no monitoramento da temperatura durante o processo 
                         possibilitou a visualiza{\c{c}}{\~a}o em tempo real dos 
                         diferentes gradientes de temperatura na interface de 
                         liga{\c{c}}{\~a}o tanto no sentido radial quanto longitudinal. 
                         Nas amostra onde se utilizou pinos com geometria c{\^o}nica 
                         ocorreu melhor distribui{\c{c}}{\~a}o da temperatura na 
                         interface de liga{\c{c}}{\~a}o, com maior eleva{\c{c}}{\~a}o 
                         na regi{\~a}o central da amostra nos tr{\^e}s segundos iniciais 
                         do processo. Valores num{\'e}ricos obtidos a partir do 
                         modelamento matem{\'a}tico em 1D apresentaram grande 
                         aproxima{\c{c}}{\~a}o quando comparados com os dados obtidos 
                         experimentalmente. ABSTRACT: In search of alternative processes 
                         utilized for joining dissimilar materials, one of the most 
                         relevant process is rotary friction welding, which is being used 
                         in hightechnology applications in aerospace industry, aeronautics, 
                         nuclear, military and automotive. The rotary friction welding 
                         process (RFW) happens in the solid state without occurrence of 
                         fusion between the parties, and presents as the main binding 
                         mechanisms the diffusion and mechanical mixture. This work has 
                         like objective the mechanical and microstructural 
                         characterization, and study of the thermal profile of dissimilar 
                         joints involving aluminium alloy AA 6351-T6 and stainless steel 
                         AISI 304L commercially produced in Brazil, for applications in the 
                         aerospace sector. Dissimilar joints were obtained using different 
                         geometries and characterized by means of traction mechanical 
                         essays, Vickers microhardness (HV), optical and electronic 
                         microscopy (SEM, EDX), X-ray photoelectron spectroscopy (XPS), and 
                         had its thermal profile studied from experimental works of real 
                         time temperature monitoring with the aid of termoc{\^a}mera, 
                         thermocouples, and 1D analytical modeling. Results of mechanical 
                         tests showed the great efficiency of the manufacturing process of 
                         dissimilar joints for structural engineering applications. Joints 
                         produced from pin with conical geometry presented a higher 
                         mechanical strength in all tests. In the micro-structural analysis 
                         and XPS was characterized the interdiffusion between the main 
                         components of the materials involved in the process. Samples of 
                         joints that had the rupture in the bonding interface was analyzed 
                         and it was found that high percentages of Fe combined at low 
                         percentages of Ni, improve the mechanical resistance of the 
                         junction. The use of termoc{\^a}mera and system of thermocouples 
                         in temperature monitoring during the process enabled the realtime 
                         visualization of different temperature gradients in the bonding 
                         interface both in radial and longitudinal direction. In samples 
                         where used pins with conical geometry occurred better temperature 
                         distribution on the interface, with the highest elevation in the 
                         central region of the sample within three seconds of the process. 
                         Numeric values obtained from the mathematical modeling in 1D 
                         presented great approach when compared with the data obtained 
                         experimentally.",
            committee = "An, Chen Ying (presidente / orientador) and Toledo, Rafael Cardoso 
                         ( orientador) and Piorino Neto, Francisco (orientador) and 
                         Mineiro, S{\'e}rgio Luiz and Travelho, Jer{\^o}nimo dos Santos 
                         and Santos, Eduardo Ferro dos and Dollinger, Christian Frederico 
                         de {\'A}vila Von",
           copyholder = "SID/SCD",
         englishtitle = "Mechanical characterization and study of the thermal profile 
                         during rotary friction welding of dissimilar materials",
             language = "pt",
                pages = "208",
                  ibi = "8JMKD3MGP3W34P/3LBKP3B",
                  url = "http://urlib.net/rep/8JMKD3MGP3W34P/3LBKP3B",
           targetfile = "publicacao.pdf",
        urlaccessdate = "29 nov. 2020"
}


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