Laser welding beryllium in a deuterium atmosphere
Methods for laser welding beryllium in high pressure deuterium atmospheres were investigated. The methods included direct fusion welds, braze welds and fusion welds in aluminum coatings on beryllium. Bead-on-plate laser welds were made in deuterium, argon and helium atmospheres. Severe porosity was observed in welds made in deuterium atmospheres. Weld cracking was observed in welds made in inert gas atmospheres. Weld porosity was the major obstacle to laser fusion welding beryllium in deuterium atmospheres. Braze welding with aluminum reduced porosity, but such braze welds were unacceptable. Fusion welds in high purity aluminum coatings on the beryllium were sound. A hole in beryllium was successfully sealed in deuterium by coating a counterbore around the hole with high purity aluminum and laser welding the aluminum. 6 figures, 5 tables.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6621156
- Report Number(s):
- UCID-19602; ON: DE83003312
- Country of Publication:
- United States
- Language:
- English
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