Laser Surface Remelting
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. Microstructural Characterization of a Laser Surface Remelted Cu-Based Shape Memory Alloy
Cu-based shape memory alloys (SMAs) present some advantages as higher transformation temperatures, lower costs and are easier to process than traditional Ti-based SMAs but they also show some disadvantages as low ductility and higher tendency for intergranular cracking. Several studies have sought for a way to improve the mechanical properties of these alloy
Mat. Res.. Publicado em: 12/04/2018
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2. Metallic Glass Formation Upon Rapid Solidification of Fe60Cr8Nb8B24 (at%) Alloy through LASER Cladding and Remelting
Fe60Cr8Nb8B24 (at%) amorphous powder and ingot were submitted to LASER cladding and remelting process, respectively. Fe-based coatings were produced using different LASER processing parameters and characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and Vickers microhardness. All coatings obtained by LASER cladding (LC) and layers obt
Mat. Res.. Publicado em: 17/11/2017
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3. Surface Modification of Ti6Al4V Alloy by Pulsed Lasers: Microstructure and Hydrophobic Behavior
In many aerospace applications, it is important to produce hydro-repellent surfaces because water and ice accumulation could lead to malfunctioning of the part or component with a potential critical failure. In this study, it was investigated the texturing of a titanium alloy (Ti6Al4V) by applying a pulsed Nd:YAG laser, aimed at the surface characterization
Mat. Res.. Publicado em: 21/09/2017
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4. Resistência à corrosão e simulação numérica da temperatura e tensões induzidas na refusão superficial a laser da liga aerospacial Al1,5% Fe
Neste trabalho a liga aeroespacial Al1,5%Fe foi submetida ao tratamento de refusão superficial a laser (RSL). O processo ocorre através da aplicação localizada da radiação laser com alta densidade de potência, acontecendo um rápido aquecimento e fusão do material irradiado, seguido de um resfriamento com taxas elevadas sendo que a solidificação da
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/08/2012
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5. Simulação numérica e análise experimental do tratamento superficial por refusão a laser de uma liga Al-Fe / Numerical simulation and experimental analysis of laser surface remelting treatment of an Al-Fe aloy
Neste trabalho, o software ANSYS, baseado no Método dos Elementos Finitos, é adaptado para a simulação tridimensional do fluxo de calor no processo de refusão superficial a laser. A análise numérica é validada com resultados simulados por outros modelos existentes na literatura para casos de refusão superficial a laser de alumínio puro e com result
Publicado em: 2009
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6. Transient solidification, microstruture and properties of Al-Ni alloys / Solidificação transitoria, microestrutura e propriedades de ligas Al-Ni
The development of optimized microstructures during the solidification stage of processing is of fundamental importance to the mechanical properties and to the performance of finished products of metallic alloys. In this study the kinetics of solidification and its effects on macro and microstructural parameters, as well as the consequent influence on the fi
Publicado em: 2009
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7. Laser surface remelting and hardening of an automotive shaft sing a high-power fiber laser
An automotive shaft was surface-remelted and hardened using a 2 kW fiber laser and an adapted linear axis whose rotating axis produced helical tracks at 120 RPM. The process variable was the laser power, ranging from 300 to 1100 W, which produced two regions in the material: a martensitic region (MR) and a partially transformed region (PTR). The MR is formed
Materials Research. Publicado em: 2007-12
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8. Obtaining by laser treatment and characterization of superface composite on cast duplex stainless steels / Obtenção por tratamento a laser e caracterização de composito superficial em aços inoxidaveis duplex fundidos
In this work was studied the orientation relations between austenite and ferrite in three cast duplex stainless steels, ASTM A890 1A, 3A, 6A on solution treatment. After that, simple laser surface remelting (LR) and laser melt injection (LMI) treatments were carried out on the alloys. The microstructural changes and the effects of laser treatments on hardnes
Publicado em: 2007
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9. Microestructurals changes and corrosion resistance of the duplex stainless steel after laser surface remelting / Mudanças microestruturais e resistencia a corrosão de aços inoxidaveis duplex apos tratamentos superficiais por refusão a laser
Neste trabalho procurou-se observar as mudanças microestruturais e os efeitos na resistência à corrosão dos aços inoxidáveis duplex UNS S32304 e S32205, bastante utilizados pela indústria petrolífera, após realização de tratamentos superficiais por refusão a laser. Foram realizados inicialmente vários testes para a determinação experimental do
Publicado em: 2005
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10. Simulação numerica de tratamento superficial por refusão a laser : interação radiação laser-materia e solidificação
In this work, a two dimensional numerical modei in cylindrical coordinates based on the finite difference technique is developed pennitting the description of the thermal field evolution during heating, fusion, solidification and cooling along the laser surface treatment processo The model predictions are compared to experimental results as well as to those
Publicado em: 2003