Weldability
Mostrando 25-33 de 33 artigos, teses e dissertações.
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25. Caracterização de junta soldada por atrito linear com mistura (FSW) da liga Al-Mg-Si AA 6063. / Friction stir welded joint characterization of 6063 aluminum alloy.
Friction Stir Welding process arose from a desire to apply the principles and benefits of traditional solid state friction welding friction in non axi-symmetric geometries. Thus, it was added a traveling speed and a special rotating tool that allows welding aluminum alloys with bad weldability. The key factor to have a linear friction welding with sound bead
Publicado em: 2009
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26. WELDABILITY ANALISES OF API 5L X-80 STEEL USING TEKKEN TEST AND IMPLANT TEST / ANÁLISE DA SOLDABILIDADE DO AÇO API 5L X-80 POR MEIO DOS TESTES TEKKEN E DE IMPLANTE
This work shows a study of the weldability of API 5L X-80 steel using the Tekken Test and the Implant Test. The research analises the weldability of HSLA X-80 steel for orbital circunferencial welding with the Shielded Metal Arc Weld and the Flux Core Arc Weld processes with regard to hydrogen induced cracking formation. The aim is to make feasible different
Publicado em: 2008
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27. Soldabilidade dos aços DUAL-PHASE 600 e 800 via processo de soldagem a pontos média freqüência corrente contínua (MFDC) e corrente alternada (AC) / Weldability of 600 and 800 Dual-Phase Steels by Using Resistance Spot Welding Medium Frequency Direct Current (MFDC) and Alternating Current (AC)
Dual-Phase steels have been developed to match the automotive-industry need of highresistance materials that lead to weight reduction and, therefore, reducing emissions. Specifically, in the use Resistance Spot Welding (RSW) process, the Medium Frequency Direct Current (MFDC) equipment has been largely introduced in the automotive industry without, however,
Publicado em: 2008
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28. Estudo da transformação durante o resfriamento continuo e da microestrutura do aço microligado X80 utilizado na construção de tubos para transporte de gás natural e petróleo. / Study of the transformation during the continuous cooling and the microstructure of microalloyed steel X80 used in the building of pipelines for gas and oil transport.
The continuous increase of energy generated from petroleum and natural gas created the need to improve the mechanical properties of microalloyed steels used in gas and oil pipelines, in order to increase their flow with smaller costs and higher reliability. The control of the different phases, morphology of microconstituents like ferrite plus carbide aggrega
Publicado em: 2008
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29. Influence of the electrical current, upset force and tempering heat treatment in the flash butt welding of bimetal band saw blades / Influência da corrente elétrica, da força de recalque e do tratamento térmico de revenimento na soldagem topo-a-topo por centelhamento de serras de fita bimetálica.
The performance of bimetal band saw blades depends mainly on the features of joining their ends, carried out by flash butt welding process. This is a resistance welding method, which consists of electrical heating followed by a fast material forging. The present work has the objective of studying the influence of changing the electrical current, upset force
Publicado em: 2007
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30. The effect of alloying on the resistance of carbon steel for oilfield applications to CO2 corrosion
A systematic study has been conducted to investigate the influence of a wide range of alloying elements and different processing conditions on the resistance of low-carbon steels to CO2 corrosion. Strong carbide-forming microalloying elements such as Ti, Nb and V, along with Cr additions, and different levels of Mn, Si, Cu, Mo and Ni, have been explored, alo
Materials Research. Publicado em: 2005-12
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31. Laser beam welding of titanium nitride coated titanium using pulse-shaping
A new welding method which allows the assembly of two titanium nitride coated titanium parts is proposed. The welding procedure utilizes the possibility for pulse-shaping in order to change the energy distribution profile during the laser pulse. The pulse-shaping is composed of three elements: a) a short high power pulse for partial ablation at the surface;
Materials Research. Publicado em: 2005-09
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32. Estudo de ciclos termicos em juntas soldadas de um aço de alta resistencia e baixa liga atraves do metodo "In Situ"
In this work, a methodology was developed for weldability of steels of high strength. The test used to the study ofthe eraeks in the weld was Tekken testo Welded by the proeess of Flux Cored Are Welding (FCA W), semiautomatie, where, through the study of the thermal eyeles looking to determine the parameters that providing better struetural and meehanieal pr
Publicado em: 2004
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33. Precipitação de fases intermetálicas e austenita secundária na ZAC de soldagens multipasse de aços inoxidáveis duplex. / Intermetallic phases and secondary austenite precipitation at the multipass welding HAZ of duplex stainless steels.
Duplex stainless steels (DSS) have excellent mechanical and corrosion properties. Many researches have been developed regarding the weldability of these alloys. There are some phase transformations that take place during the welding process, which may impair the welded joint behavior. High temperature heat-affected zone (HTHAZ) microstructures were simulated
Publicado em: 2001