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 of Tungsten and Molybdenum written by Harry A. Hokanson and published by . This book was released on 1961 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: Techniques for the high-voltage electron beam welding of pure W and arc-cast Mo-0.5% Ti were developed and evaluated. Welds were produced in sheet thicknesses of 0.005, 0.050, and 0.100 in. for each material. Primary emphasis was placed on producing butt welds of maximum strength and ductility. Limited work was performed on lap, seam, edge, and spot welding. The effects of various welding conditions on weld-zone characteristics were evaluated by visual, radiographic, fluorescent penetrant, and metallographic inspection. Welds were inspected for extent of fusion and recrystallization, grain size, cracking, porosity, and other pertinent effects. Butt welds of each thickness exhibiting optimum weldzone characteristics were evaluated for mechanical properties. Weld ductilities were determined by transverse bend testing at temperatures to 1200 F. Weld tensile properties were determined at room temperature and at temperatures to 2800 F. (Author).
Download or read book Joining of Tungsten written by R. E. Monroe and published by . This book was released on 1960 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electron Beam Welding of Pure Tungsten Hex Cans for Nuclear Thermal Propulsion Engines written by Z. S. Courtright and published by . This book was released on 2019 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electron Beam Welding written by H Schultz and published by Woodhead Publishing. This book was released on 1993 with total page 246 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 Mechanical Properties and Recrystallization Behavior of Electron beam melted Tungsten Compared with Arc melted Tungsten written by William D. Klopp and published by . This book was released on 1966 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study has been conducted of the properties of tungsten fabricated from three ingots consolidated by electron-beam melting. The study included purity as a function of number of melts, recrystallization a d grain growth behavior, low-temperature ductility, and high-temperature tensile and creep strength. The level of most metallic impurities in tungsten decreased with increasing number of electron-beam melts, the reduction being greatest for aluminum, iron, nickel, and silicon. The levels of interstitial impurities generally were not affected by remelting. Resistivity ratios for single crystals machined from ingot slices tended to increase on remelting. The recrystallization rates for worked, electron-beam- melted (EB-melted) tungsten were significantly higher than those observed earlier for arc-melted tungsten. The grain growth rates of EB-melted tungsten were higher than those reported previously for arc-melted tungsten, further reflecting the higher purity of the EB-melted materials. The activation energies for both recrystallization and grain growth in EB-melted tungsten were consistent with expected values assuming grain boundary self-diffusion to be the rate-controlling reaction. The ductile-brittle bend transition temperature for EB-melted tungsten is slightly higher in the worked condition than that reported for arc-melted tungsten. In the recrystallized conditions, the transition temperatures for EB- and arc-melted tungsten are similar. The tensile strength of EB-melted tungsten at 2500 to 4000 F is less than that of arc-melted tungsten. This is partly associated with the large grain size of EB-melted tungsten. However, when compared at the same grain size,
Download or read book Electron Beam Welding of Aerospace Materials written by William I. Kern and published by . This book was released on 1963 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: High-voltage electron beam welding techniques capable of producing butt welds of optimum strength and ductility were developed for B120VCA titanium, D6AC steel, molybdenum-0.5% titanium to tungsten, and beryllium. Welds were produced in material thicknesses of 0.125 inch for the B120VCA titanium; 0.290 inch and 0.090 inch for the D6AC steel; 0.100 inch, 0.050 inch, and 0.005 inch for the molybdenum-0.5% titanium welded to tungsten; and 0.040 inch for the beryllium. The effects of thermal treatments (aging and heat treating) were investigated in the B120VCA and D6AC by welding and testing a variety of weld/thermal treatment combinations. A comprehensive preliminary welding phase was conducted during which the effects of various welding conditions on weld-zone characteristics were evaluated by visual, radiographic or dye penetrant, and metallographic inspection. Welds were evaluated for extent of fusion, grain size, cracking, porosity, and other pertinent effects.
Download or read book Electrochemical Testing of Gas Tungsten Arc Welded and Reduced Pressure Electron Beam Welded Alloy 22 written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Alloy 22 (N06022) is the material selected for the fabrication of the outer shell of the nuclear waste containers for the Yucca Mountain high-level nuclear waste repository site. A key technical issue in the Yucca Mountain waste package program has been the integrity of container weld joints. The currently selected welding process for fabricating and sealing the containers is the traditional gas tungsten arc welding (GTAW) or TIG method. An appealing faster alternative technique is reduced pressure electron beam (RPEB) welding. Standard electrochemical tests were carried on GTAW and RPEB welds as well as on base metal to determine their relative corrosion behavior in SCW at 90 C (alkaline), 1 M HCl at 60 C (acidic) and 1 M NaCl at 90 C (neutral) solutions. Results show that for all practical purposes, the three tested materials had the electrochemical behavior in the three tested solutions.
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 Review of Recent Developments in the Technology of Tungsten written by Vincent David Barth and published by . This book was released on 1961 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electrochemical Testing of Gas Tungsten ARC Welded and Reduced Pressure Electron Beam Welded Alloy 22 written by S. Daniel Day and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Alloy 22 (N06022) is the material selected for the fabrication of the outer shell of the nuclear waste containers for the Yucca Mountain high-level nuclear waste repository site. A key technical issue in the waste package program has been the integrity of the container weld joints. The currently selected welding process for fabricating and sealing the containers is the traditional gas tungsten arc welding (GTAW) or TIC method. An appealing faster alternative technique is reduced pressure electron beam (RPEB) welding. It was of interest to compare the corrosion properties of specimens prepared using both types of welding techniques. Standard electrochemical tests were carried on GTAW and RPEB welds as well as on base metal (non-welded) to determine their relative corrosion behavior in simulated concentrated water (SCW) at 90 C (alkaline), 1 M HCI at 60 C (acidic) and 1 M NaCl at 90 C (neutral) solutions. Results show that for all practical purposes, the three tested materials had the same electrochemical behavior in the three tested electrolytes.
Download or read book Electron Beam Vacuum Welding written by W. L. Wyman and published by . This book was released on 1958 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Weldability Strength and High Temperature Stability of Chemically Vapor Deposited Tungsten written by and published by . This book was released on 1972 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Comparison of Electron Beam and Tungsten Inert Gas Arc Welds in Commercially Pure Titanium written by John Frederick Hinrichs and published by . This book was released on 1964 with total page 69 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 NASA Technical Note written by and published by . This book was released on 1965 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flux Bounded Tungsten Inert Gas Welding Process written by P Chakravarthy and published by CRC Press. This book was released on 2019-12-10 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: This focus book is intended to introduce the Flux Bounded Tungsten Inert Gas Welding (FBTIG) process, which is a variant of Activated Tungsten inert gas welding process. The benefits of activating flux in the weld pool in enhancing the depth of penetration and underlying mechanisms for the same is explained in detail. The benefits of FBTIG process over other fusion welding process are highlighted. The scope for the FBTIG process to be adapted at the industrial level and the advancements in this field is detailed that enables the practicing engineers to exploit the same. Covers activated TIG process, role of activating fluxes in enhancing the depth of penetration Illustrates mechanisms associated with FBTIG process including arc constriction effect, insulation effect and reverse marangoni flow Discusses scope of FBTIG process for commercialization at the industry level Gives general overview of chronological advancements in the field of welding This book is aimed at graduate students, researchers and professionals in welding, manufacturing and engineering.
