A5011775287- Welding Techniques and Residual Stresses
- Additive Manufacturing Materials and Processes
- Metal and Thin Film Mechanics
- High Entropy Alloys Studies
- Microstructure and Mechanical Properties of Steels
- Laser and Thermal Forming Techniques
- Metal Alloys Wear and Properties
- Advanced Welding Techniques Analysis
- Laser Material Processing Techniques
- Aluminum Alloy Microstructure Properties
- Hydrogen embrittlement and corrosion behaviors in metals
- High-Temperature Coating Behaviors
- Tribology and Lubrication Engineering
- Titanium Alloys Microstructure and Properties
- Diamond and Carbon-based Materials Research
- Pigment Synthesis and Properties
- Advanced machining processes and optimization
- Additive Manufacturing and 3D Printing Technologies
- Advanced materials and composites
- Advanced Surface Polishing Techniques
- Fatigue and fracture mechanics
- Shape Memory Alloy Transformations
- Laser-induced spectroscopy and plasma
- Solidification and crystal growth phenomena
- Nuclear Materials and Properties
Instituto de Estudos Avançados da Universidade de São Paulo
2013-2024
Instituto de Estudios Avanzados
2009-2024
Fundação Hospitalar de Hematologia e Hemoterapia do Amazonas
2024
Centro Universitário do Norte
2024
Universidade Paulista
2024
Amazon (United States)
2024
Faculdade Metropolitana de Manaus
2024
Instituto Tecnológico de Aeronáutica
2012-2023
Universidade Federal de Ouro Preto
2016-2023
EarthTech International (United States)
2020-2023
Composite stretchable conducting wires Think how useful a electronic “skin” could be. For example you place it over an aircraft fuselage or body to create network of sensors, processors, energy stores, artificial muscles. But is difficult make interconnects and strain sensors that can stretch such surfaces. Liu et al. created superelastic fibers by depositing carbon nanotube sheets onto prestretched rubber core (see the Perspective Ghosh). The nanotubes buckled on relaxation core, but...
Adhesion is one of the most important characteristics coating on cutting tools. Poor adhesion tool favors fragmentation and release hard abrasive particles between workpiece. These interact with surfaces tool, accelerating its wear decreasing life. One possible solution use laser texturing prior to in order achieve a desired surface topography enhanced properties. In texturing, high-frequency short-pulse changes characteristics, generating resolidified material selective vaporization. This...
High strength low alloy steels are employed in structural elements and, despite presenting good weldability, the welded joint is always a critical issue and its evaluation fundamental guaranteeing integrity. The mechanical properties of weld beads can be significantly different from base material's due to metallurgical alterations caused by welding process. One factors leading significant impact heat input. This paper evaluates hardness, fracture toughness fatigue crack growth obtained via...
In this study, the effect of preheating a AISI 304 steel substrate to 300 °C, compared room-temperature substrate, just before direct energy deposition (DED) additive manufacturing 316 L deposit in terms absorptivity laser beam, heat transfer, microstructure, hardness and residual stress. The samples were thermally isolated using an alumina cup. Using for 20 40 layers steel, it was found absorptivities 18% 16%, respectively, room temperature (RT) experiments. At high temperatures (HT, °C)...
The maraging steel are considered ultra high strength due to its yield greater than 1400 MPa and part of a set advanced materials interest for technological development, mainly aeronautics aerospace industry. For this purpose should submit good toughness, fatigue resistance acceptable weldability. These steels used in the industry as high-strength fasteners, engine casings missiles, landing gear structures, among others. There few studies process laser welding material, making it important...
Abstract Metallic materials have received special attention in the aerospace and defense areas. A few decades ago, Brazil was faced with technological challenges concerning production processing of ultra-high strength steels, such as AISI 4340 SAE 300 M steels. The 4130 steel had been also considered, since it is applied landing gears, small aircrafts engine cradles, besides general industries. In this work, a comparative welding process, Laser Beam Welding (LBW) used an alternative to...
Dual Phase steels are one of the most used advanced high-strength materials in industry, due to its combination a ductile ferritic matrix and disperse hard martensite islands, which provide outstanding mechanical properties for components be cold stamped. This work investigated fiber laser welding applicability 600 1.6 mm thick steel sheets, evaluating potential impacts on material industrial applications. A first set bead-on-plate welds was generated define best parameters subsequent tests....