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Master's Dissertation
DOI
https://doi.org/10.11606/D.85.2015.tde-28082015-103250
Document
Author
Full name
Arthur Maximo
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2015
Supervisor
Committee
Rossi, Wagner de (President)
Berretta, José Roberto
Riva, Rudimar
Title in Portuguese
Comparação entre soldagem de chapas finas de tântalo e monel 400 com laser pulsado de Nd:YAG e com laser contínuo de fibra
Keywords in Portuguese
chapas finas
corrosão
Monel
soldagem a laser
Tântalo
Abstract in Portuguese
Neste trabalho foram realizados experimentos de soldagem de chapas de Tântalo e Monel 400 com 100 m de espessura. Foram realizadas soldas em um laser de Nd:YAG operando em modo pulsado e em um Laser de Fibra operando em modo contínuo. Em seguida a microestrutura das amostras foram analisadas através de microscopia ótica e foram realizados ensaio de microdureza Vickers. As amostras que apresentaram melhores resultados foram submetidas a ensaios de tração e a ensaios de corrosão. Após análise dos resultados observou-se que a soldagem a laser apresenta muitos benefícios em relação a outros processos convencionais para chapas finas. A soldagem no modo pulsado apresentou maior relação de aspecto se comparado a soldagem em modo contínuo. A soldagem em modo contínuo apresentou uma velocidade de soldagem muito superior ao modo pulsado. Os resultados indicaram que a soldagem no modo pulsado apresenta maior aplicabilidade para chapas finas, devido à necessidade um controle preciso sobre a intensidade aplicada.
Title in English
Comparison between welding of thin sheets of Tantalum and Monel 400 with pulsed Nd:YAG laser and continuous fiber laser
Keywords in English
corrosion
laser welding
Monel
tantalum
thin sheets
Abstract in English
This work carried out welding experiments of Tantalum and Monel 400 plates with 100 mm thickness. Welds were made with an Nd: YAG laser operating in a pulsed mode and in a fiber laser operating in continuous mode. Then the microstructure of the samples were analyzed by optical microscopy and were performed Vickers microhardness test. Samples that showed better results were subjected to tensile tests and the corrosion tests. After analysis of the results showed that the laser welding offers many benefits over other conventional processes for thin sheets. The welding in pulsed mode presented in superior aspect ratio compared to welding in continuous mode. The welding in continuous mode showed a much higher welding speed to pulsed mode. The results indicated that the welding in pulsed mode shows more applicability for sheet metal, due the need of a precise control of applied intensity.
 
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Publishing Date
2015-08-31
 
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