A5006274709- Welding Techniques and Residual Stresses
- Advanced Welding Techniques Analysis
- Microstructure and Mechanical Properties of Steels
- Hydrogen embrittlement and corrosion behaviors in metals
- Additive Manufacturing Materials and Processes
- Metal Alloys Wear and Properties
- Aluminum Alloy Microstructure Properties
- High Entropy Alloys Studies
- Metal and Thin Film Mechanics
- Aluminum Alloys Composites Properties
- Corrosion Behavior and Inhibition
- High-Temperature Coating Behaviors
- Additive Manufacturing and 3D Printing Technologies
- Mechanical Behavior of Composites
- Smart Materials for Construction
- Fatigue and fracture mechanics
- Metal Forming Simulation Techniques
- Academic Research in Diverse Fields
- Electronic Packaging and Soldering Technologies
- Metallurgical Processes and Thermodynamics
- Intermetallics and Advanced Alloy Properties
- Titanium Alloys Microstructure and Properties
- Metallurgy and Material Forming
- Semiconductor materials and interfaces
- Electrodeposition and Electroless Coatings
Universidade Federal de Pernambuco
2016-2025
Universidade de São Paulo
2024
Instituto Nacional de Tecnologia
2024
Weatherford College
2023
Universidade Nova de Lisboa
2022-2023
University of Lisbon
2022
Instituto Politécnico de Santarém
2022
University of Minho
2022
Polytechnic Institute of Porto
2007-2019
Universidade Estadual de Campinas (UNICAMP)
2009-2017
The microstructures of four welded joints austenitic stainless steel were studied to better understand the effect different cooling rates on volume fraction δ-ferrite phase, in overlay deposits obtained by SMAW process. weld pads carried out using E316L and E347 electrodes adjusting welding parameters provide high low heat. produced submitted rates, being one applying higher heat input air, another lower water. Complementary techniques microstructural analysis applied, such as optical...
Consolidated UNS S32205 duplex stainless steel joints welds were performed using a friction stir welding (FSW) process. An experimental set-up was used to record the thermal history of FSW joint. For points at equal distance from weld centreline, temperature measured near beginning lower than that in middle welded This attributed non-stationary transfer condition. cycle showed shorter time spent elevated compared presented by fusion welding, indicating less propensity detrimental second...
Friction stir welding was used to produce butt joints on 6 mm thick plates of UNS S32101 lean duplex stainless steel, S32205 and S32750 S32760 superduplex steels. Fully consolidated were achieved, with full penetration, using heat input 1.37-1.50 kJ/mm. Specimens submitted tensile testing performed perpendicular the direction showed failure base metal, reflecting better mechanical performance welded joints. Furthermore, along revealed higher yield strengths in all cases, as well increased...
Abstract The cladding process offers advantages such as low porosity, minimal dilution, distortion of substrate, small heat‐affected zone, contributing to improving the chemical, physical, and mechanical characteristics coatings. Carbides, a reinforcing element, are frequent in applications prone wear. In this contribution, an ASTM A36 mild steel was coated with niobium carbide reinforced AISI 316 L powder filler material under multiple laser deposition parameters. effect studied parameters...
EFFECT OF OCTADECYLAMINE ON THE PROPERTIES POLY(METHYL METHACRYLATE)/ POLYSTYRENE BLENDS. Blends of poly(methyl methacrylate)/polystyrene (PMMA/PS) in compositions 95/05 and 90/10, with without the surfactant octadecylamine (ODA), were studied. Analysis results obtained by a viscosimetric method using classical models, Fourier Transform Infrared Spectroscopy (FTIR), refractive index showed that blends are immiscible. However, analysis miscibility cluster model polymeric aggregates formed...
The present study aimed to explore the relationships between coping strategies, symptoms of depression, anxiety, and stress, satisfaction with life among Portuguese workers. A sample 402 participants (207 male, 195 female), ranging in age from 18 70 years (M = 32.90, SD 11.75), was included study. Participants reported varying levels work experience, 1 45 10.62, 4.07). encompassed diverse occupations, including arts design (n 28), engineering 23), marketing 27), administration 50),...
UNS S32205 duplex stainless steel welds were performed by friction stir welding (FSW). Advancing and retreating sides showed distinct characteristics in the welded joint. The advancing side shows strongest grain refinement which is corroborated microhardness measurements. microstructure characterization was carried out optical, scanning transmission electron microscopy. thermomechanically affected zone displays austenite islands deformed a ferrite matrix. (SZ) fine recrystallized providing...
One of the most studied deleterious phases in stainless steels is sigma phase, due to its high potential decrease toughness and corrosion resistance these steels. Eight samples as-received cold rolled UNS S32205 duplex steel were submitted isothermal heat treatments at 850 oC during 10, 15, 30, 60, 120, 180, 240, 300 minutes order study precipitation kinetics chi phases. Several complementary microstructural analysis techniques used determine volume fraction intermetallic phases, including...
Duplex stainless steels are successful in a variety of applications such as the food industry, petrochemicals and plants for desalination seawater, where high corrosion resistance mechanical strength required. However, beneficial microstructure may change during fusion welding steps, it can compromise performance these materials. Friction stir is solid-state process avoiding typical problems concerning solidification cracks, liquation segregation alloying elements. Superduplex avoid...