Download or read book Electron Beam Welding of a Depleted Uranium Alloy to Niobium Using a Calibrated Electron Beam Power Density Distribution written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Electron beam test welds were made joining flat plates of commercially pure niobium to a uranium-6wt%Nb (binary) alloy. The welding parameters and joint design were specifically developed to minimize mixing of the niobium with the U-6%Nb alloy. A Modified Faraday Cup (MFC) technique using computer-assisted tomography was employed to determine the precise power distribution of the electron beam so that the welding parameters could be directly transferred to other welding machines and/or to other facilities.
Download or read book Joining Uranium to Aluminum Using Electron Beam Welding and an Explosively Clad Niobium Interlayer written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A uranium alloy was joined to a high strength aluminum alloy using a commercially pure niobium interlayer. Joining of the Nb interlayer to the aluminum alloy was performed using an explosive welding process, while joining the Nb interlayer to the uranium alloy was performed using an electron beam welding process. Explosive welding was selected to bond the Nb to the aluminum alloy in order to minimize the formation of brittle intermetallic phases. Electron beam welding was selected to join the Nb to the uranium alloy in order to precisely control melting so as to minimize mixing of the two metals. A Modified Faraday Cup (MFC) technique using computer-assisted tomography was employed to determine the power distribution of the electron beam so that the welding parameters could be directly transferred to other welding machines. Optical microscopy, scanning electron microscopy, microhardness, and tensile testing of the welds were used to characterize the resulting joints. This paper presents the welding techniques and processing parameters that were developed to produce high integrity ductile joints between these materials.
Download or read book Effects of Electron beam Welding on Uranium 6 Weight Percent Niobium Alloy written by and published by . This book was released on 1982 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Electron Beam Welding written by Robert A. Bakish and published by . This book was released on 1964 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electron beam Welding of Tungsten written by R. E. Monroe and published by . This book was released on 1962 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reported progress on the electron-beam welding of commercially pure W indicates that sound crack-free welds can be made if the weld is not restrained during welding. Although the data are not all consistent, welds which are smooth and have minimum fusion and heat-affected zone width should be the strongest and most ductile. Tensile strengths are equivalent to the base metal near the recrystallization temperature but are appreciably lower at room temperature. The ductile-to-brittle transition temperatures for electron-beam-welded tungsten are above that of the base metal. The impact resistance of electron-beam-welded tungsten is very low. Electron-beam welding of tungsten parts should be thoroughly evaluated on production prototypes before specifying its use. (Author).
Download or read book ELECTRON BEAM WELDING STUDY ON U Nb Zr ALLOY Final Report written by and published by . This book was released on 1970 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characterization of Electron Beam Melted Uranium 6 Niobium Ingots written by and published by . This book was released on 1997 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study was undertaken at Lawrence Livermore National Laboratory to characterize uranium, 6% niobium ingots produced via electron beam melting, hearth refining and continuous casting and to compare this material with conventional VIM/skull melt /VAR material. Samples of both the ingot and feed material were analyzed for niobium, trace metallic elements, carbon, oxygen and nitrogen. Ingot samples were also inspected metallographically and via microprobe analysis.
Download or read book Electron Beam Welding written by H Schultz and published by Elsevier. This book was released on 1994-01-01 with total page 245 pages. Available in PDF, EPUB and Kindle. Book excerpt: Translated from the German, this is a practical book for engineers which explains the trials, development and manufacturing processes involved in electron beam welding.
Download or read book Welding of Columbium and Columbium Alloys written by W. J. Lepkowski and published by . This book was released on 1960 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Source Book on Electron Beam and Laser Welding written by Mel M. Schwartz and published by . This book was released on 1981 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1969 with total page 1508 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electron Beam Welding Achievements and Problems Review written by B. E. Paton and published by Routledge. This book was released on 1989 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Automated System for Studying the Power Distribution of Electron Beams written by and published by . This book was released on 1994 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt: Precise welds with an electron beam welder are difficult to reproduce because the factors effecting the electron beam current density distribution are not easily controlled. One method for measuring the power density distribution in EB welds uses computer tomography to reconstruct an image of the current density distribution. This technique uses many separate pieces of hardware and software packages to obtain the data and then reconstruct it consequently, transferring this technology between different machines and operators is difficult. Consolidating all of the hardware and software into one machine to execute the same tasks will allow for real-time measurement of the EB power density distribution and will provide a facilitated means for transferring various welding procedure between different machines and operators, thereby enhancing reproducibility of electron beam welds.
Download or read book Electron Beam Melting of Uranium written by Henry M. Eikenberry and published by . This book was released on 1963 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transferring Electron Beam Welding Parameters Between DIfferent Machines and Facilities Using Advanced Diagnostics written by T. A. Palmer and published by . This book was released on 2004 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transferring electron beam (EB) welding parameters between different welders can be a costly and time consuming process requiring the completion of expensive weld parameter studies. In order to modernize and streamline this process, the LLNL Beam Profiler diagnostic tool, which has been developed and tested at Lawrence Livermore National Laboratory (LLNL) to measure the size, shape, and power density distribution of electron beams, is currently being used to characterize the performance of EB machines at several U.S. Department of Energy facilities. The characterization of these machines involves performing defocus studies on each welder to measure the properties of 1 kW beams made at constant current, voltage, and work distance settings. Using these carefully characterized beams, autogenous welds on 304L stainless steel were then made at LLNL and replicated on the other machines. A key finding from these studies was that the widespread use of work distance values measured from the surface of the part being welded to the top of the EB vacuum chamber are suitable only for machines with a similar upper column design. Otherwise, the focus-lens to part distance must be determined and controlled. A simple method for determining the focus-lens to part distance with the LLNL Beam Profiler diagnostic tool is presented. The ability to transfer EB welds between machines represents a major accomplishment in the development and more widespread use of this diagnostic tool. This work also serves as a basis for the continuing development of procedures and equipment for characterizing electron beams and as a precursor to the development of a modern weld transfer procedure.
Download or read book Electron Beam Welding written by Michael John Fletcher and published by . This book was released on 1971 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government reports annual index written by and published by . This book was released on 199? with total page 1164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
