Laser Welding
Mostrando 1-12 de 51 artigos, teses e dissertações.
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1. Systematic review and meta-analysis of welding procedures in one-piece cast implant-supported frameworks
Abstract The objective of this systematic review and meta-analysis was to evaluate the effect of welding techniques on implant-supported prostheses and determine whether they contribute to a better adaptation compared with a one-piece cast. A search was conducted using the PubMed/MEDLINE, Embase, and Cochrane Library databases, and articles published until N
Braz. oral res.. Publicado em: 25/11/2019
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2. Caracterização Mecânica e Análise Microestrutural de Chapas Obtidas pelo Processo de Tailor Welded Blank (TWB)
Resumo Um dos maiores desafios da indústria automobilística, a nível global, trata-se de desenvolver veículos que sejam, simultaneamente, leves e resistentes mecanicamente. O Tailor Welded Blank (TWB) surge como solução, pois é um processo que permite a soldagem de topo de chapas de diferentes especificações (material, espessura e/ou revestimento),
Soldag. insp.. Publicado em: 14/11/2019
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3. Contrastive Research on Electrical Contact Performance for Contact Materials of Cu-SnO2 and Cu-ZnO2 Alloys
Herein, SnO2- and ZnO2-doped (1.5 wt.%) composite Cu powder was prepared by mechanical alloying (MA) respectively, and both the contact materials of oxide-doped Cu alloys were subsequently obtained by canned hot-pressing powder sintering with hot extrusion combined. Scanning electron microscopy (SEM), laser scanning confocal microscopy (LSCM) and self-design
Mat. Res.. Publicado em: 25/04/2019
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4. Nickel-Titanium Alloys Welding of Thin Sheets Using GTAW: Comparative Study Between Similar and Dissimilar Welding with AISI 304 Stainless Steel
The objective of the present work was to evaluate welding of thin sheets (thickness < 1 mm) of similar and dissimilar NiTi alloys with AISI 304 stainless steel using the Gas Tungsten Arc Welding (GTAW) process and to study the mechanical and metallurgical properties of the joints with and without post-welding heat treatment (PWHT). The GTAW process was chose
Mat. Res.. Publicado em: 08/11/2018
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5. A Comparative Study of the Heat Input During Laser Welding of Aeronautical Aluminum Alloy AA6013-T4
ABSTRACT The heat input is the amount of energy supplied per unit length of the welded workpiece. In this study, the effect of two different heat inputs in laser beam welding of a high strength aluminum alloy AA6013-T4 was evaluated from macrostructural and microstructural points of view. The experiments were performed using a continuous wave 2 kW Yb-fiber l
J. Aerosp. Technol. Manag.. Publicado em: 14/06/2018
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6. 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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7. Experimental Development of Dual Phase Steel Laser-arc Hybrid Welding and its Comparison to Laser and Gas Metal Arc Welding
Abstract Dual phase DP600 steels have been used in many automobile structures and laser welding has been the standard method for the joining of different sections. This work proposed a comparison between laser welding with arc welding (GMAW) and with hybrid laser-arc welding in order to access the microstructures and the mechanical behavior. The laser and hy
Soldag. insp.. Publicado em: 2016-09
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8. 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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9. 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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10. Comparação das propriedades mecânicas de juntas de alumínio obtidas por soldagem a laser (LBW), por friction stir welding (FSW) e rebitadas para aplicação em estruturas aeronáuticas
Três processos de união de perfis de alumínio concorrem para a manufatura de painéis estruturais (união entre revestimento e reforçadores) aeronáuticos: rebitagem, Friction Stir Welding (FSW) e soldagem a laser (Laser Beam Welding - LBW). Esses processos têm vantagens e desvantagens particulares, as quais foram analisadas no presente estudo focando,
Soldag. insp.. Publicado em: 2014-06
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11. Stress Distribution in Co-Cr Implant Frameworks after Laser or TIG Welding
Resumo A falta de passividade tem sido associada a problemas biomecânicos em próteses implantossuportadas. A proposta deste estudo foi avaliar, por meio da fotoelasticidade, a influência de três diferentes de fabricação de infraestrutura em liga de Co-Cr na passividade destas. O modelo foi obtido a partir de uma matriz de aço simulando uma mandíbula
Braz. Dent. J.. Publicado em: 2013-04
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12. Efeito do desajuste marginal, tipo de soldagem e material do parafuso sobre a força de destorque de parafusos protéticos e tensões induzidas aos pilares / Effect of marginal misfit, welding type and screw material on the strength of the detorque prosthetic screws and stress induced the abutments
O objetivo neste estudo foi analisar as tensões induzidas aos análogos de pilares protéticos, utilizando-se strain gauges; e avaliar a força de destorque de parafusos protéticos (ouro e titânio) em infraestruturas fundidas em titânio comercialmente puro (Ti cp), antes e após os procedimentos de soldagem laser e TIG (tungsten inert gas). Foram confecc
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/04/2012