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| Abstract No.: |
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Scheduled at:
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Wednesday, March 28, 2012, SuperC, Hall Ford 5:00 PM
Diagnostics
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| Title: |
Electron beam diagnostic and quality assurance through beam probing
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| Authors: |
Andy Dack* / TWI Limited, UK
Chris Punshon / TWI Ltd, UK
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| Abstract: |
It is well known that different electron beam machines provide very different welding performance. In critical applications, such as aerospace engine or nuclear component welding, process procedures and parameters are developed to reduce defect occurrences to an acceptable level without an underlying appreciation of the beam qualities required. An improved knowledge of these beam qualities is required to assure quality assurance, enable the transfer of welding from one machine to another and to ensure accurate assessment of new production welding equipment.
This paper will detail TWIsrecent development of an integrated beam probing and analysis tool to measure electron beams. This equipment has been applied in the laboratory and also toindustrial EB welding machinesgenerating data relating to production welds. The data shows an indication of the beam quality and can be referenced to each weld. This can be used to offer a QA diagnostic tool to the operator and also to the quality assurance specialist. Continuing development focuses on creating a real time analysis of the electron beam quality, to provide the operator with a green light / red light decision on beam quality without the need for extensive EB process knowledge and expertise.
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