Laser Fusion
Mostrando 1-12 de 67 artigos, teses e dissertações.
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1. Direct Analysis of Human Hair Before and After Cosmetic Modification Using a Recent Data Fusion Method
The cosmetic modification of hair is a very common procedure used to mask or cover evidence at a crime scene. Deoxyribonucleic acid (DNA) tests are expensive and require good-quality collection of samples and a database profile. To overcome these challenges, direct analysis was performed on a large set of hair strands collected from individuals, denoted orig
J. Braz. Chem. Soc.. Publicado em: 2020-01
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2. Mechanical and Metallurgical Characterization of Laser Welding on P91 Ferritic Steel and Incoloy 800HT Dissimilar Joints
In this work, microstructural characterization and mechanical properties of P91 and Incoloy 800HT dissimilar laser beam welded joint were analyzed. In addition to that, metallographical studies were conducted using Optical microscopy, Scanning electron microscopy (SEM) equipped with Energy-dispersive X-ray spectroscopy (EDX) and X-Ray diffraction analysis (
Mat. Res.. Publicado em: 01/02/2018
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3. Laser Surface Modification of Ti6Al4V-Cu for Improved Microhardness and Wear Resistance Properties
To modify the properties of Ti6Al4V alloy, Cu has been added to host an antimicrobial effect in the revised alloy for marine application. The Laser Metal Deposition (LMD) process on the Ti6Al4V alloy and Cu was been investigated for surface modification in order to combat the problem of biofouling in the marine industry. The investigations focused on the mic
Mat. Res.. Publicado em: 26/06/2017
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4. Evaluation of Residual Stresses and Mechanical Properties of IF Steel Welded Joints by Laser and Plasma Processes
Interstitial free (IF) steel has an extensive application in the automotive industry where the Laser Beam Welding (LBW) process is widely used due to its high productivity. Similarly, the other used process, Plasma Arc Welding (PAW), is characterized by a greater energy concentration and current density and therefore lower distortion, higher welding speeds a
Mat. Res.. Publicado em: 29/04/2016
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5. Mechanical and Corrosion Properties of a Duplex Steel Welded using Micro-Arc or Laser
Duplex stainless steels have been extensively used in parts that are subject to corrosive environments and that have high mechanical strength requirements. Welding usually distorts the well-balanced austenite-ferrite ratio, and can produce brittle intermetallic phases; therefore, post-welding heat treatments are usually required. For applications where post-
Mat. Res.. Publicado em: 2015-08
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6. Nd:YAG laser irradiation effect on apical intracanal dentin - a microleakage and SEM evaluation
The purpose of this in vitro study was to evaluate the effect of neodymium:yttrium-aluminum-garnet (Nd:YAG) laser irradiation on intracanal dentin surface by SEM analysis and its interference in the apical seal of filled canals. After endodontic treatment procedures, 34 maxillary human incisors were randomly assigned to 2 groups. In the negative control grou
Brazilian Dental Journal. Publicado em: 2011
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7. Análise da resistência à corrosão e ao desgaste do aço inoxidável austenítico ASTM F 138 tratado por laser / Corrosion and wear resistance analysis of ASTM F 138 austenitic stainless steel treated by laser
No presente trabalho, o aço inoxidável austenítico ASTM F 138, empregado na fabricação de implantes ortopédicos temporários e permanentes, foi submetido a tratamento de superfície por laser, com o intuito de analisar as modificações microestruturais resultantes deste tratamento e seus efeitos na resistência à corrosão e ao desgaste microabrasivo
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/07/2010
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8. 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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9. Estudo da copolimerização em mini emulsão de metacrilato de metila/metacrilato de etila / Study of methyl methacrylate/ethyl methacrylate in mini emulsion copolimerization
Reduction of volatile organic compounds (VOC) usage is a constant environmental demand. Polymeric aqueous emulsion of low surfactant contends produced from direct miniemulsion synthesis are used with advantages to replace organic solvents media as well as aqueous emulsions of high surfactant concentration. Water as continuous phase and organic monomers with
Publicado em: 2008
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10. Redução aluminotérmica do óxido de tântalo usando uma tocha de plasma como ignitor
In this work was used a plasma torch of non transferred arc with argon as work gas, using a power supply with maximum DC current of 250 A and voltage of 30 V to activate the plasma and keep it switched on. The flame temperature was characterized by optical emission spectroscopy, through Boltzmann-plot-method. The torch has been used like igniter in the alumi
Publicado em: 2007
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11. Produção digital de maquetes arquitetonicas : um estudo exploratorio / Digital fabrication of architectural models : an exploratory study
The present work is an exploratory study about the digital fabrication of architectural models. It started with a literature review, with the aim of getting in contact with the new digital methods for making models and prototypes, from modeling software to rapid prototyping equipment, processes, materials and applications. Still in this initial study the wor
Publicado em: 2007
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12. "Interação do laser de diodo de alta potência com a superfície radicular. Efeito na morfologia, na variação de temperatura e na adesão e proliferação de fibroblastos em cultura" / Interaction between high power diode laser and dental root surface. Thermal, morphological and biocompatibility analysis
The aim of this study was to analyze the interaction between the high power diode laser and the dental root surface through the temperature variation analysis (Step A), root surface morphological observation (Step B), adhesion and proliferation of fibroblasts cultured on the top of the root surfaces (Step C). Twenty-one uniradicular teeth were used in the 3
Publicado em: 2006