A5008776328- Welding Techniques and Residual Stresses
- Advanced Welding Techniques Analysis
- Contact Mechanics and Variational Inequalities
- Hydrogen embrittlement and corrosion behaviors in metals
- Microstructure and Mechanical Properties of Steels
- Fatigue and fracture mechanics
- Non-Destructive Testing Techniques
- Landslides and related hazards
- Advanced Numerical Methods in Computational Mathematics
- Numerical methods in engineering
- Material Properties and Failure Mechanisms
- Composite Structure Analysis and Optimization
- Advanced Mathematical Modeling in Engineering
- Magnetic Properties and Applications
- Advanced Optimization Algorithms Research
- Hydrology and Sediment Transport Processes
- Optimization and Variational Analysis
- Soil erosion and sediment transport
- Soil and Unsaturated Flow
- Probabilistic and Robust Engineering Design
- Structural Integrity and Reliability Analysis
- High-Velocity Impact and Material Behavior
- Dam Engineering and Safety
- Pesticide and Herbicide Environmental Studies
- Aerospace Engineering and Control Systems
Universidade Federal do Rio de Janeiro
2012-2024
Welding is the main joint technology used in steel manufactured products, particular, shipbuilding industry. Recent works report effect of residual stress redistribution on butt welded plates a relatively short period after welding procedures. The phenomenon was investigated by daily monitoring stresses and vertical displacements plate surface. state monitored magnetic method, absolute values were measured using X-ray diffraction techniques. A laser tracking device to measure surface...
Welding is widely used in the manufacture of steel products. Metallurgical processes during welding produce residual stresses different zones welded parts. stresses, particularly tensile can significantly impact reliability and integrity components. Our recent works report effect stress redistribution a relatively short, up to two weeks, period after procedure. The hypothesis that observed relaxation phenomenon associated microstructure evolution occur material end procedure was proposed. To...
A study of the migration grain boundary misorientation and its relationship with residual stresses through time immediately after completion a thermomechanical simulation has been carried out. After physically simulating an intercritically overheated welding heat affected zone, variation contours was observed electron backscatter diffraction (EBSD) technique likewise RAYSTRESS equipment. It that in ASTM DH36 steel modified simulation, which corresponds to measured stress along first week...
An experimental study on the distribution of residual stresses induced by shot peening samples SAE 1020 steel with pre-existing compressive is presented. Two similar geometries were subjected to a heat treatment relieve stress. Then, one was cementation process introduce stresses. Both samples, and without cementation, same treatment. Using X-ray diffraction electrolytic polishing remove superficial layers, depth-resolved stress obtained. It concluded that effect should be considered as...
Repair by welding is widely used in the shipbuilding industry during ship construction. The effect of residual stress distribution induced process on structure important for repair effectiveness. This article presents an experimental study plates that are typically ships and offshore structures. Different techniques evaluated to identify best practice associated with values. Recommendations discussed, modifications present proposed.
Neste trabalho foi estudada a evolução das tensões residuais nas chapas navais após o procedimento de soldagem topo. Foram avaliados dois tipos diferentes soldagem, com eletrodo simples e duplo. Distribuições foram monitoradas durante duas semanas soldagem. As medidas no metal depositado, na área ZTA base próximo ao cordão solda, longo soldadas utilizando método difração raios-X. Os resultados experimentais mostram processo contínuo redistribuição relativamente curto intervalo tempo,...
ResumoProcessos metalúrgicos durante soldagem provocam tensões residuais em peças soldadas.Recentemente foi observado um efeito de redistribuição das num período até duas semanas após o termino do processo soldagem.Existe hipótese nossa que esta está associada a mudança na microestrutura ocorre no material soldagem.Para provar hipótese, uma simulação física dos ciclos térmicos realizada utilizando termomecânica (GLEEBLE