A5056886949- Aluminum Alloy Microstructure Properties
- Advanced Welding Techniques Analysis
- Corrosion Behavior and Inhibition
- Aluminum Alloys Composites Properties
- Hydrogen embrittlement and corrosion behaviors in metals
- Anodic Oxide Films and Nanostructures
- Welding Techniques and Residual Stresses
- Non-Destructive Testing Techniques
- Concrete Corrosion and Durability
- Metallurgical Processes and Thermodynamics
- Metal Forming Simulation Techniques
- Advanced Machining and Optimization Techniques
- Magnesium Alloys: Properties and Applications
- Pigment Synthesis and Properties
- Mechanical Engineering and Vibrations Research
- Concrete Properties and Behavior
- Nuclear Physics and Applications
- Metallurgy and Material Science
- Natural Fiber Reinforced Composites
- High-Temperature Coating Behaviors
- Nuclear Materials and Properties
- Mechanical Behavior of Composites
- Microstructure and Mechanical Properties of Steels
- Ultrasonics and Acoustic Wave Propagation
- Tailings Management and Properties
Instituto de Pesquisas Energéticas e Nucleares
2018-2024
National Nuclear Energy Commission
2018-2024
Universidade de São Paulo
2020-2023
Interface (United Kingdom)
2019
John Wiley & Sons (United States)
2019
Universidade Federal do Espírito Santo
2014-2015
In this study, the corrosion mechanisms of AA2024-T3 and AA2098-T351 were investigated compared using various electrochemical techniques in 0.005 mol L−1 NaCl solution. The severe type was intragranular attack (IGA) although trenching pitting related to constituent particles seen. On other hand, exhibited localised associated with micrometric particles, its propagation via grain boundaries leading intergranular (IGC). Electrochemical showed that reaction both alloys controlled by diffusion....
Hybrid composites with synthetic and natural fibers are a good choice in the field of composites, as they combine mechanical performance advantages fibers. In this work, polymeric hybrid associating glass fiber were developed. Three developed: sisal/glass, coir/glass Luffa/glass. The five-layer laminate, three layers E-glass interspersed two that can be sisal, coir, or Luffa sponge (Luffa Cylindrica). addition to fiberglass composite was also manufactured. manufactured by compression molding...
The galvanic interactions within and between the friction stir weld zones of AA2198-T851 alloy have been investigated using electrochemical microscopy techniques. parent material (PM) was most anodic region exhibited pronounced severe localized corrosion (SLC) both when coupled isolated. zone resistant to no SLC coupled, but Profiles associated with dissolved oxygen consumption hydrogen generation currents across weldment were inversely related because produced higher bubbles and,...
In this study, different types of localized corrosion in the friction stir welding (FSW) zones an AA2198-T8 when alloy is subjected to a test hydrogen peroxide–chloride soluti...
Abstract In this study, the resistance to exfoliation and intergranular corrosion (IGC) of 2198 Al–Cu–Li alloy submitted different thermomechanical treatments (T3, T8, T851) was investigated. The tests were carried out following standard practices, ASTM G34‐18 G110‐15, respectively. All tested alloys showed susceptibility some IGC, but artificially aged presented a higher tendency exfoliation. extensive hydrogen evolution reaction (HER) observed on surfaces when immersed in EXCO solution....
Abstract In this study, special attention was given to the characterization of pits on anodized aluminum alloy (Al–Zn–Mg–Cu) with an anodic oxide formed in tartaric sulfuric acid. Anodic polarization 0.1 mol L −1 NaCl solution used initiate pitting corrosion alloy. Pit characteristics, such as morphology and depth, were evaluated by using optical microscopy profilometry, scanning electron microscopy. The methodology adopted study revealed severe under‐film due highly occluded conditions...
Abstract In this study, the intergranular corrosion (IGC) susceptibility of AA2098‐T351 welds, fabricated through friction stir welding (FSW), was systematically evaluated. The evaluation employed American Society for Testing and Materials (ASTM) G110‐92 practice electrochemical impedance measurements, with comparative analyses against unwelded alloys (BS). key findings depicted that FSW‐induced microstructure changes significantly influenced IGC across different zones. Zones affected by FSW...
In the present study, exfoliation susceptibility of weld zones in friction stir welded AA2098-T351 was compared with that base metal (BM) according to ASTM G34 standard practice. Friction welding (FSW) had a significant effect on microstructure Al alloy tested and strongly affected by microstructure. Different features corrosion attack were observed when FSW isolated or coupled. Also, near-surface deformed layer an important exfoliation. These are main findings this work. The correlated...
A novel potentiometric Al3+−ion selective microelectrode (ISME), with internal solid contact, based on the use of a neutral carrier morin as ionophore is reported. The ability ISME to image local ion concentration distributions was tested aluminum alloy surfaces freely corroding in an aqueous solution containing chloride ions. then used sensing tip for scanning electrochemical microscopy (SECM) operation monitor reactive sites associated dissolution that developed 2098−T351 Al−Cu−Li result...
In this study, the behaviour of micrometric particles AA2198-T8 alloy during anodising at various voltages and effect voltage on anodised surface morphology have been investigated in a tartaric-sulfuric acid solution. The results were compared with that AA2024-T3 alloy. For alloy, partial dissolution these occurred 0, 3 4 V. Besides, for potentials above 5 V, there is preferential intermetallic particles. indicated total 0 V whereas occurred. Between 1 2 no was observed both alloys. resulted...
In this work, scanning electrochemical microscopy (SECM) measurements were employed to characterize the activities on polished and as‐received surfaces of 2098‐T351 aluminum alloy (AA2098‐T351). The effects near surface deformed layer (NSDL) its removal by polishing evaluated compared use different modes SECM. Confocal laser (CLSM) electron (SEM) also morphology surfaces. chemistry was analyzed X‐ray photoelectron spectroscopy (XPS). generation/tip collection (SG/TC) competition SECM used...
Amperometric and potentiometric probes were employed for the detection characterization of reactive sites on 2098-T351 Al-alloy (AA2098-T351) using scanning electrochemical microscopy (SECM). Firstly, probe concept was performed a model Mg-Al galvanic pair system SECM in amperometric operation modes, order to address responsiveness this system. Next, these sensing characterize alloy surface immersed saline aqueous solution at ambient temperature. The distribution local pH changes associated...
In this work, the effect of eight types surface treatments on corrosion resistance friction stir welded samples an AA2198‐T8 Al‐Cu‐Li alloy were tested and compared in attempt to find suitable alternatives toxic carcinogenic hexavalent chromium treatments. All anodized subjected different post‐anodizing The (1) hydrothermal treatment Ce (NO 3 ) 6H 2 O solution; (2) solution with H ; (3) boiling water; (4) conversion coating; (5) immersion BTSE (bis‐1,2‐(triethoxysilyl) ethane. treated was...