Soldagem por ponto no estado sólido de ligas leves Solid state spot welding of lightweight alloys
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2011
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Abstract
A recente preocupação quanto às mudanças climáticas vem impulsionando pesquisas em eficiência energética dos meios de transportes no sentido de reduzir a emissão de gases. Uma das principais soluções consiste na redução do peso estrutural através da aplicação de novos materiais, como as ligas leves de alumínio e magnésio. Entretanto, novos usos ficam muitas vezes limitados pela dificuldade de união desses materiais. A técnica de soldagem por fricção e mistura (FSW) é um processo de união no estado sólido que surge como uma alternativa viável para substituir ou complementar as tecnologias de união consagradas. Como uma junta contínua não é sempre a requisitada, duas tecnologias de união por ponto derivadas do FSW estão em desenvolvimento: soldagem por fricção e mistura por ponto (FSSW) e soldagem por fricção por ponto (FSpW). Além de fornecerem juntas de elevada resistência e praticamente isentas de defeitos, estas técnicas apresentam alta eficiência energética, curto ciclo de soldagem, facilidade de automação e compatibilidade com o meio-ambiente, fazendo frente às técnicas convencionais de união por ponto, como a soldagem por resistência por ponto (RSW) e a rebitagem.
The recent concern about climate change has stimulated research into transport energy efficiency in order to reduce the emission of gases. One of the main solutions is to reduce the structural weight through the application of new materials, such as aluminum and magnesium lightweight alloys. However, new applications are often limited by the difficulty of joining these materials. Friction Stir Welding (FSW) is a solid state joining technique that emerges as a viable alternative to replace or complement the established joining technologies. As a continuous weld is not always requested, two spot welding technologies derived from FSW are under development: Friction Stir Spot Welding (FSSW) and Friction Spot Welding (FSpW). Besides providing almost defect-free and high strength joints, these techniques exhibit high energy efficiency, short welding cycle, ease of automation and environmental compatibility, competing against the conventional spot joining techniques, such as Resistance Spot Welding (RSW) and riveting.
The recent concern about climate change has stimulated research into transport energy efficiency in order to reduce the emission of gases. One of the main solutions is to reduce the structural weight through the application of new materials, such as aluminum and magnesium lightweight alloys. However, new applications are often limited by the difficulty of joining these materials. Friction Stir Welding (FSW) is a solid state joining technique that emerges as a viable alternative to replace or complement the established joining technologies. As a continuous weld is not always requested, two spot welding technologies derived from FSW are under development: Friction Stir Spot Welding (FSSW) and Friction Spot Welding (FSpW). Besides providing almost defect-free and high strength joints, these techniques exhibit high energy efficiency, short welding cycle, ease of automation and environmental compatibility, competing against the conventional spot joining techniques, such as Resistance Spot Welding (RSW) and riveting.
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| Authors | Campanelli, Leonardo Contri;Alcântara, Nelson Guedes de;Santos, Jorge Fernandez dos; |
| Journal | soldagem & inspeção |
| Year | 2011 |
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