Research
Master's Dissertation
Additive manufacturing technologies offer several advantages in order to create new materials with diverse geometries and special properties difficult to obtain with other conventional manufacturing processes. Of this kind, powder bed fusion technologies are the most used to create metallic parts and its market is expected to continue growing. Samples of the Nb47Ti alloy fabricated from plasma atomized and hydride-dehydride powders by laser powder bed fusion additive manufacturing were investigated. It was compared and discussed their microstructure, mechanical properties, and viability in order to reduce cost in the manufacturing of medical implants. Samples with high density and quality were achieved, however, oxygen and nitrogen are issues to be considered during future production of the hydride-dehydride powder. Read Here (in Portuguese).
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Bachelor's Thesis
The increase in use of natural gas made interesting the exploration of SOUR (sulfur containing) gas reserves. The harsh environmental conditions associated with the H2S present in the gas and petroleum reserves demand better steel properties in order to increase the hydrogen induced cracking resistance (HIC). A high-strength low-alloy steel (HSLA) API-X65 SOUR with low Mn and high Nb was characterized by different techniques and it was evaluated its hydrogen induced cracking resistance (HIC). The low Mn steel was designed with the purpose of reducing or eliminating the central segregation and avoiding banding in the microstructure to increase the resistance to the HIC. Tensile and Charpy tests were conducted according to the standards of the American Petroleum Institute (API) 5L and the standard ASTM A370−14, and HIC tests according to the NACE TM-0284 standard. Read Here in Portuguese or Read Here in Spanish.
Publications
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2020 - Comparing spherical and irregularly shaped powders in laser powder bed fusion of Nb47Ti alloy, (In review)
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2020 - Laser powder bed fusion parameters to produce high-density Ti-53%Nb alloy using irregularly shaped powder from hydride-dehydride (HDH) process, Journal of Materials Research and Technology. Read Here.
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2019 - Comparison of manufactured samples by selective laser melting from spherical and irregular powders of the Ti53Nb alloy, 74th Annual Congress of the Brazilian Metallurgy, Materials and Mining Association, São Paulo, SP, Brazil. Read Here (in Portuguese)
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2019 - Microstructure and crystallographic texture of Nb-47Ti alloy produced by selective laser melting, 74th Annual Congress of the Brazilian Metallurgy, Materials and Mining Association, São Paulo, SP, Brazil. Read Here (in Portuguese).
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Presentations in Academic Events
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2019 - Speaker, Fabrication of Ti53Nb alloy by selective laser melting as a new option for implants, The Young Persons' Lecture Competition, Araxá, Mina Gerais, Brazil.
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2019 - Coauthor, Comparing Spherical and Irregular Powders in the Selective Laser Melting of Ti-53%Nb alloy, Materials Science & Technology, Portland, Oregon, United States. Read Abstract.
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2019 - Speaker (in Portuguese), Comparison of manufactured samples by selective laser melting from spherical and irregular powders of the Ti53Nb alloy, 74th Annual Congress of the Brazilian Metallurgy, Materials and Mining Association, São Paulo, SP, Brazil. Read Here.
2018 - Speaker, Study of the Ti53Nb alloy fabricated by selective laser melting, Materials Science & Technology, Columbus, Ohio, United States. Read Abstract.
2018 - Speaker (in Portuguese), Microstructural evolution of the Ti53Nb alloy fabricated by selective laser melting, MetMat USP Symposium, São Paulo, SP, Brazil. Read Abstract.
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Posters
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2019 - Co-author and co-advisor (in Portuguese), Selective Laser Melting – Ti53Nb Alloy: Residual Depth of the Melt Pool, USP International Symposium of Scientific and Technological Initiation (SIICUSP), São Paulo, SP, Brazil. Read Here.