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Master's Dissertation
DOI
https://doi.org/10.11606/D.3.2022.tde-22052023-105542
Document
Author
Full name
David Alexander Urbina Leal
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2022
Supervisor
Committee
Monlevade, Eduardo Franco de (President)
Júnior, Jaime Casanova Soeiro
Santos, Daniella Caluscio dos
Title in Portuguese
Caracterização microestrutural e avaliação da resistência à corrosão na manufatura aditiva do ER308L pelo processo TIG.
Keywords in Portuguese
Aço inoxidável
Manufatura aditiva
TIG
Abstract in Portuguese
O interesse pela Manufatura Aditiva tem crescido rapidamente nos últimos anos em diversas áreas desenvolvendo distintos métodos, tecnologias e materiais na fabricação peças de geometrias relativamente complexas e de grandes proporções com alta integridade estrutural e operacional, utilizando o princípio deposição camada por camada. Destacando-se assim a Manufatura Aditiva por Arco Elétrico uma preferência para as indústrias automotiva e aeroespacial, devido a sua alta taxa de deposição e qualidade. Neste estudo, utilizou-se o processo de soldagem TIG mecanizado para a fabricação dos protótipos, tendo o arco elétrico como fonte de calor e ao ER 308L como consumível. Com o propósito a caracterização microestrutural e avaliação a resistência à corrosão por pite segundo a norma ASTM G 48 método A, nas condições de deposição de material estipuladas tais como: deposição unidirecional e deposição bidirecional. Obtendo microestruturas do tipo ferritaaustenita e morfologias de ferrita tanto acicular como vermicular. Também apresentaram resistência a corrosão ao longo da microestrutura toda nas duas condições de temperatura estabelecidas na norma.
Title in English
Microstructural characterization and corrosion resistance evaluation in the additive manufacturing of ER308L by TIG process.
Keywords in English
Additive manufacturing
Stainless steel
TIG
Abstract in English
The interest in Additive Manufacturing has grown rapidly in recent years in several areas developing different methods, technologies, and materials in the manufacture of parts of relatively complex geometries and large proportions with high structural and operational integrity, using the deposition principle layer by layer. Electric Arc Additive Manufacturing stands out as a preference for the automotive and aerospace industries, due to its high deposition rate and quality. In this study, the mechanized TIG welding process was used to manufacture the prototypes, with the electric arc as heat source and the ER 308L as consumable. With the purpose of microstructural characterization and evaluation of the pitting corrosion resistance according to ASTM G 48 method A, in the stipulated material deposition conditions such as: unidirectional deposition and bidirectional deposition. Obtaining ferriteaustenite microstructures and both acicular and vermicular ferrite morphologies. They also showed corrosion resistance along the entire microstructure in the two temperature conditions established in the standard.
 
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Publishing Date
2023-05-23
 
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