Results 111 to 120 of about 18,438 (273)
NASA Tech Briefs Index, 1977, volume 2, numbers 1-4 [PDF]
Announcements of new technology derived from the research and development activities of NASA are presented. Abstracts, and indexes for subject, personal author, originating center, and Tech Brief number are presented for ...
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Journal of Materials Research and TechnologyThis paper aims to investigate the influence of welding sequences on welding induced residual stress and deformation of U-rib components fabricated by laser-arc hybrid welding through experimental and numerical methods.
Shaoning Geng +5 more
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Applied Sciences, 2019 In thick section laser welding, filler metal addition is usually required to improve joint fit-up tolerances or to control the chemical composition of the weld metal.
Miikka Karhu +3 more
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Research Status and Progress of All-Position Narrow-Gap GMAW for Pipelines
Applied SciencesDuring the all-position narrow-gap welding process of pipelines, welding defects tend to occur in non-flat welding positions, constraining the quality and efficiency of pipeline construction.
Wenji Liu +4 more
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, 2013 International audienceThe joining of high thickness steel sheets by means of hybrid Laser/GMAW welding processes is studied in this paper. A three dimensional finite element model has been developed to simulate this process.
Bellet, Michel +2 more
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Modelling of the bead formation during multi pass hybrid laser/gas metal arc welding
, 2012 International audienceA three dimensional finite element model has been developed to simulate weld bead formation in multi pass hybrid laser/gas metal arc welding.
Bellet, Michel +2 more
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Mitigation of welding distortion and residual stresses via cryogenic CO2 cooling - a numerical investigation [PDF]
, 2008 Fusion welding remains the most common and convenient fabrication method for large, thinplate welded structures. However, the resulting tendency to out-of-plane distortion exacts severe design and fabrication penalties in terms of poorer buckling ...
Camilleri, D., Gray, T.G.F., Nash, D.H.
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MetalsThis study systematically investigates the behavior of droplet transfer and the characteristics of weld morphology in laser-cable-type welding wire (CWW) arc hybrid welding under varying Ar-CO2 shielding gas compositions, utilizing AH36 shipbuilding ...
Zhidong Yang +7 more
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A Review of Welding in Space and Related Technologies [PDF]
Deployment of welding and additive manufacturing (AM) technologies in the space environment has the potential to revolutionize how orbiting platforms are designed, manufactured, and assembled.
Naden, N., Prater, T. J.
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