Objetivo
Despite significant improvements in power beam welding technology over recent years, it still remains impossible to characterise laser and EB welds in a unique fashion and to produce quantifiable mechanical properties. Guidance on design aspects of power beam welded joints is currently lacking for potential users so that they are often reluctant to opt for such a welding process despite the availability of the technology. The objective of this industrial project is to provide an improved understanding of the failure behaviour of similar and dissimilar laser and EB welds in order to be able to predict structural performance. The project programme extended current non-destructive (NDT) and destructive testing standards to power beam welded joints and provided recommendations for best practise and the changes necessary to current techniques to achieve this. In order to accomplish this, it is necessary to:
i) Identify major weldability and joint quality problems for various materials
ii) Develop techniques for the identification of defect types (NDT) and determination of mechanical and fracture behaviour of joints
iii) Develop and validate a methodology - European Quality Assessment Concept (EQAC) - for structural integrity assessment of power beam welded joints which takes into account the unique features of these joints
iv) Provide a first Weld-Defect-Catalogue for power beam weld joints using improved NDT methodology
The European Quality Assessment Concept (EQAC) for power beam welds developed in this project considers the unique features of power beam welds and their defects on various materials. Present mechanical and NDT standards do not take into account these features (strength mismatch, defect types, and weld shape etc) of power beam welds in a unified fashion. The structural reliability of these welds urgently needs a systematic effort to show their suitability for conventional as well as advanced structural components. Testing of structural components used in aerospace and civil engineering will be included to determine structural performance and validate the developed EQAC.
This project covers laser and electron beam weldability aspects of over twenty metallic structural materials. The consortium comprises a Research Centre (GKSS) specialised in testing and assessment of weld defects, a Nd:YAG laser source manufacturer (QUANTEL), a manufacturer of laser welded steel components (Thyssen Laser Technik), a company specialised in EB-welding of large structural components (CNIM), a company user of both power beam welding processes in repair of aerospace components and end user of the NDT for the inspection of the same components (INTERTURBINE), a steel manufacturer and large scale testing laboratory (BRITISH STEEL), a company experienced in CO2 laser welding of advanced materials (RTM), a company specialising in NDT (NU-TECH), a research centre (FORCE) with experience in laser welding of steels, a company (ANSALDO) manufacturing heavy industrial and power plant components.
Objectives and content
Despite significant improvements in power beam welding technology over recent years, it still remains impossible to characterise laser and EB welds in a unique fashion and to produce quantifiable mechanical properties. Guidance on design aspects of power beam welded joints is currently lacking for potential users so that they are often reluctant to opt for such a welding process despite the available technology to fabricate the joint. The objective of this proposal is to provide an improved understanding of the failure behaviour of similar and dissimilar laser and EB welds in order to be able to predict structural performance. The proposed programme will extend current nondestructive (NDT) and destructive testing standards to power beam welded joints and will result in recommendations for best practice and the changes necessary to current techniques to achieve this. In order to accomplish this, it is necessary to:
- Identify major weldability and joint quality problems for various materials.
- Develop techniques for the identification of defect types (NDT) and determination of mechanical and fracture behaviour of joints. - Develop and validate a methodology - European Quality Assessment Concept (EQAC)- for structural integrity assessment of power beam welded joints which takes into account the unique features of these joints
- Provide a first Weld-Defect-Catalogue for power beam weld joints using improved NDT methodology ( -focus X-ray radiography and radioscopy).
The European Quality Assessment Concept (EQAC) for power beam welds to be developed in this project will consider the unique features of power beam welds and their defects on various materials. Present mechanical and NDT standards do not take into account these features (strength mismatch, defect types and weld shape etc.) of power beam welds in a unified fashion. The structural reliability of these welds urgently needs a systematic effort to show their suitability for conventional as well as advanced structural components. Testing of structural components used in aerospace and civil engineering will be included to determine structural performance and validate the developed EQAC.
This project also covers laser and electron beam weldability aspects of various A1-alloys. It will establish welding conditions for optimum weld properties by developing new super pulsed 2kW Nd:YAG laser for this purpose.
Ámbito científico (EuroSciVoc)
CORDIS clasifica los proyectos con EuroSciVoc, una taxonomía plurilingüe de ámbitos científicos, mediante un proceso semiautomático basado en técnicas de procesamiento del lenguaje natural. Véas: El vocabulario científico europeo..
CORDIS clasifica los proyectos con EuroSciVoc, una taxonomía plurilingüe de ámbitos científicos, mediante un proceso semiautomático basado en técnicas de procesamiento del lenguaje natural. Véas: El vocabulario científico europeo..
- ingeniería y tecnología ingeniería médica imagenología radiografía
- ingeniería y tecnología ingeniería civil
- ciencias naturales ciencias físicas óptica física del láser
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Programa(s)
Programas de financiación plurianuales que definen las prioridades de la UE en materia de investigación e innovación.
Programas de financiación plurianuales que definen las prioridades de la UE en materia de investigación e innovación.
Tema(s)
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Las convocatorias de propuestas se dividen en temas. Un tema define una materia o área específica para la que los solicitantes pueden presentar propuestas. La descripción de un tema comprende su alcance específico y la repercusión prevista del proyecto financiado.
Convocatoria de propuestas
Procedimiento para invitar a los solicitantes a presentar propuestas de proyectos con el objetivo de obtener financiación de la UE.
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Procedimiento para invitar a los solicitantes a presentar propuestas de proyectos con el objetivo de obtener financiación de la UE.
Régimen de financiación
Régimen de financiación (o «Tipo de acción») dentro de un programa con características comunes. Especifica: el alcance de lo que se financia; el porcentaje de reembolso; los criterios específicos de evaluación para optar a la financiación; y el uso de formas simplificadas de costes como los importes a tanto alzado.
Régimen de financiación (o «Tipo de acción») dentro de un programa con características comunes. Especifica: el alcance de lo que se financia; el porcentaje de reembolso; los criterios específicos de evaluación para optar a la financiación; y el uso de formas simplificadas de costes como los importes a tanto alzado.
Coordinador
21502 GEESTHACHT
Alemania
Los costes totales en que ha incurrido esta organización para participar en el proyecto, incluidos los costes directos e indirectos. Este importe es un subconjunto del presupuesto total del proyecto.