NASA/TM-108525, Nunes, Jr., A.C. and Russell, C. and Vaughn, J. and Stocks, C. and O'Dell, D. and Bhat, B., Assessment of Corona/Arcing Hazard for Electron Beam Welding in Space Shuttle Bay at LEO for ISWE: Test Results, Materials and Processes Laboratory, Science and Engineering Directorate. NASA Marshall Space Flight Center, AL 35812, November 1996, pp. 12, Format(s): PDF 186k |
Test welds were made in argon over a range of pressures from 10-5 to 10-3 torr (the latter pressure an order of magnitude above pressures anticipated in the space shuttle bay during welding) with and without plasma on 304 stainless steel, 6Al-4V titanium, and 5456 aluminum in search of any possible unwanted electrical discharges. Only a faint steady glow of beam-excited atoms around the electron beam and sometimes extending out into the vacuum chamber was observed. No signs of current spiking or of any potentially dangerous electrical discharge were found
| Keywords: | electron beam welding, arcing, electrical discharge, spike |
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| CASI Document ID Number: | 97N13227 |
| Subjects: | Engineering: Mechanical Engineering: Welding |
| ID Code: | 362 |
| Deposited On: | 03 July 2002 |