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Search: authors:"Alexandre Queiroz Bracarense"

8 papers found.
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Avaliação da microestrutura e propriedades mecânicas de metais de solda obtidos por processos de soldagem manual e automatizado utilizado na soldagem de aço API 5L X80

The objective of this work was to evaluate the heat affected zone characteristics and weld metals microstructure and mechanical properties of API 5L X80 steel welded joints, obtained for four different welding procedures using manual and automated processes. For this, plates of this steel were welded by manual Shielded Metal Arc Welding (SMAW) process with interpasses...

Perspectiva de uso del poliestireno expandido, como alternativa de impermeabilizante, para electrodos empleados en la soldadura subacuática mojada

Underwater wet welding, using shield metal arc welding (SMAW) manual process with coated electrode, is currently the most widely used technique for repair working in underwater wet conditions because it’s easy maneuverability characteristics. The coating is the structural part of the electrode with the greatest influence on its scope, so that its waterproofing is a prerequisite...

Avaliação da soldagem multipasse de chapas espessas de aços inoxidáveis lean duplex UNS S32304 soldadas pelos processos SMAW, GMAW e FCAW: parte 1: propriedades mecânicas

The duplex stainless steels (DSS's) have been placed as an excellent alternative for applications where high corrosion resistance and high mechanical strength are required. However, DSS's, including the lean duplex, present lower weldability than the austenitic stainless steels. Thus, this study aims to evaluate the multipass welding of 22 mm plates of lean duplex stainless steel...

An investigation on graphene and nanoclay effects on hybrid nanocomposites post fire dynamic behavior

This paper deals with the post fire behavior of hybrid nanocomposites under dynamic loadings. A series of tests were performed to investigate how nanoparticles (i.e. nanoclay and graphene nanosheets) affect the post-fire overall composite behavior. Carbon fiber/epoxy-nanoclay and carbon fiber/epoxy-graphene nanosheets were manufactured. The nanoparticles employed were Cloisite...