Determination of blowout pressures during electron beam welding
During electron beam (EB) welding of developmental units, weld blowouts occurred. It is well documented that the presence of moisture causes the weld blowout. The detrimental effects of water vapor on the weld are experimentally proven [l]. The availability of water vapor in the melt increases the onset and severity of blowout and porosity. Because water vapor is insoluble in the molten metal, it will consequently form either bubbles or boil. On the other hand, hydrogen will react with other impurities present in the melt to form insoluble gas bubbles, which most likely will be entrapped in the fusion zone as porosity. This study attempts to answer the question of what is the critical weld blowout pressure, and to compare the experimental results to the estimated pressure values, so that validated calculations could be extended to other weld configurations.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE Office of Defense Programs (DP) (US)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 11328
- Report Number(s):
- UCRL-JC-133546; DP0101017; DP0101017; TRN: AH200128%%761
- Resource Relation:
- Conference: 22nd Aging, Compatibility and Stockpile Stewardship Conference, Y-12 Plant, Oak Ridge, TN (US), 04/27/1999--04/30/1999; Other Information: PBD: 1 Apr 1999
- Country of Publication:
- United States
- Language:
- English
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