Determination of blowout pressures during electron beam welding

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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 ... continued below

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879 Kilobytes pages

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Sunwoo, A. April 1999.

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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.

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879 Kilobytes pages

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  • 22nd Aging, Compatibility and Stockpile Stewardship Conference, Y-12 Plant, Oak Ridge, TN (US), 04/27/1999--04/30/1999

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  • Report No.: UCRL-JC-133546
  • Report No.: DP0101017
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 11328
  • Archival Resource Key: ark:/67531/metadc620413

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • April 1999

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  • June 16, 2015, 7:43 a.m.

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  • May 6, 2016, 1:12 p.m.

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Sunwoo, A. Determination of blowout pressures during electron beam welding, article, April 1999; California. (digital.library.unt.edu/ark:/67531/metadc620413/: accessed June 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.