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Effects Of Purity And Structure On Recrystallization Grain Growth Ductility Tensile And Creep Properties Of Arc Melted Tungsten Book in PDF, ePub and Kindle version is available to download in english. Read online anytime anywhere directly from your device. Click on the download button below to get a free pdf file of Effects Of Purity And Structure On Recrystallization Grain Growth Ductility Tensile And Creep Properties Of Arc Melted Tungsten book. This book definitely worth reading, it is an incredibly well-written.
Author : William D. Klopp,Peter L. Raffo
Publisher : Unknown
Page : 54 pages
File Size : 46,9 Mb
Release : 1964
Category : Liquid metals
ISBN : UIUC:30112106867283
Author : Anonim
Publisher : Unknown
Page : 414 pages
File Size : 42,6 Mb
Release : 1968
Category : Electronic
ISBN : MINN:31951000846128D
Author : William D. Klopp,Walter R. Witzke
Publisher : Unknown
Page : 42 pages
File Size : 51,8 Mb
Release : 1966
Category : Liquid metals
ISBN : UIUC:30112106599563
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,
Author : Peter L. Raffo,William D. Klopp
Publisher : Unknown
Page : 44 pages
File Size : 46,9 Mb
Release : 1966
Category : Alloys
ISBN : UIUC:30112106599407
Author : Pasquale Cavaliere
Publisher : Springer
Page : 781 pages
File Size : 45,7 Mb
Release : 2019-02-18
Category : Technology & Engineering
ISBN : 9783030053277
This book describes spark plasma sintering (SPS) in depth. It addresses fundamentals and material-specific considerations, techniques, and applications across a broad spectrum of materials. The book highlights methods used to consolidate metallic or ceramic particles in very short times. It highlights the production of complex alloys and metal matrix composites with enhanced mechanical and wear properties. Emphasis is placed on the speed of the sintering processes, uniformity in product microstructure and properties, reduced grain growth, the compaction and sintering of materials in one processing step, various materials processing, and high energy efficiency. Current and potential applications in space science and aeronautics, automation, mechanical engineering, and biomedicine are addressed throughout the book.
Author : United States. National Aeronautics and Space Administration Scientific and Technical Information Division
Publisher : Unknown
Page : 1152 pages
File Size : 52,5 Mb
Release : 1965
Category : Aeronautics
ISBN : STANFORD:36105113793751
Author : United States. National Aeronautics and Space Administration. Scientific and Technical Information Division
Publisher : Unknown
Page : 1156 pages
File Size : 44,6 Mb
Release : 1964
Category : Aeronautics
ISBN : CORNELL:31924057848818
Author : Peter L. Raffo
Publisher : Unknown
Page : 26 pages
File Size : 47,6 Mb
Release : 1966
Category : Boron
ISBN : UIUC:30112106599415
The effects of boron additions on the physical and mechanical properties of arc-melted tungsten and a tungsten -1 percent tantalum alloy were investigated. Boron additions significantly refined the arc-melted grain size of tungsten. The 1-hour recrystallization temperature was initially increased by small boron additions (approx. 0.01 atomic percent boron), after which it decreased continuously with increasing boron content. High-temperature tensile tests showed that the boron additions produced an initial rapid rise in strength followed by a leveling off of the strength-composition curve. Boron in solid solution was postulated to be the cause of the rapid increase in strength.
Author : L. S. Rubenstein
Publisher : Unknown
Page : 36 pages
File Size : 54,9 Mb
Release : 1968
Category : Strength of materials
ISBN : UIUC:30112106871897
Author : Anshuman Patra
Publisher : CRC Press
Page : 198 pages
File Size : 45,8 Mb
Release : 2022-05-19
Category : Technology & Engineering
ISBN : 9781000580556
Refractory metals such as W, Mo, Ta, Nb, and Re have immense potential for application in plasma-facing materials in nuclear reactors, defense materials, aviation counterweights, heating elements in furnaces, and so forth. This book presents a wide perspective of oxide dispersion strengthened refractory alloys fabrication and critical properties. It provides a comprehensive road map for an appropriate basis for alloy design, process parameter selection, fabrication route, and deformation behavior for oxide dispersion strengthened refractory alloys. It further covers achievement of application-oriented properties and critical process-regulating parameters for development of sustainable materials. Features: Covers development of oxide dispersion strengthened sustainable material to withstand high-temperature environments Describes stimulating application-oriented final mechanical properties Illustrates fabrication of alloys through effective route to achieve desired properties Presents in-depth explanation of deformation behavior at ambient and high temperatures Explores critical applications of the alloys in nuclear reactors, defense, and aviation sectors Oxide Dispersion Strengthened Refractory Alloys will be of interest to graduate students and researchers in high-temperature materials, mechanics, metallurgy, powder metallurgy, and physical metallurgy.
Author : I. Machlin
Publisher : Springer Science & Business Media
Page : 493 pages
File Size : 55,8 Mb
Release : 2012-12-06
Category : Technology & Engineering
ISBN : 9781468491203
This publication documents Proceedings of the Symposium on Metal lurgy and Technology of Refractory Metal Alloys, held in Washington, D.C. at the Washington Hilton Hotel on April 25-26, 1968, under sponsorship of the Refractory Metals Committee, Institute of Metals Division, of the Metallurgical Society of AIME, and the National Aeronautics and Space Administration. The Symposium presented critical reviews of selected topics in refractory metal alloys, thereby contributing to an in-depth understanding of the state-of-the-art, and establishing a base line for further research, development, and application. This Symposium is fifth in a series of conferences on refractory metals, sponsored by the Metallurgical Society of AlME. Publications issuing from the conferences are valuable technical and historical source books, tracing the evolution of refractory metals from early laboratory alloying studies to their present status as useful engineering materials. Refractory metals are arbitrarily defined by melting point. A 0 melting temperature of over 3500 F was selected as the minimum for this Symposium, thus excluding chromium and vanadium, which logically could be treated with other refractory metals in Groups VA and VIA of the periodic table. The Refractory Metals Committee is planning reviews of chromium and vanadium in subsequent conferences.
Author : Igor L. Shabalin
Publisher : Springer
Page : 800 pages
File Size : 54,8 Mb
Release : 2014-05-16
Category : Technology & Engineering
ISBN : 9789400775879
This exhaustive work in three volumes with featuring cross-reference system provides a thorough overview of ultra-high temperature materials – from elements and chemical compounds to alloys and composites. Topics included are physical (crystallographic, thermodynamic, thermo-physical, electrical, optical, physico-mechanical, nuclear) and chemical (solid-state diffusion, interaction with chemical elements and compounds, interaction with gases, vapours and aqueous solutions) properties of the individual physico-chemical phases and multi-phase materials with melting (or sublimation) points over or about 2500 °C. The first volume focuses on carbon (graphite/graphene) and refractory metals (W, Re, Os, Ta, Mo, Nb, Ir). The second and third volumes are dedicated solely to refractory (ceramic) compounds (oxides, nitrides, carbides, borides, silicides) and to the complex materials – refractory alloys, carbon and ceramic composites, respectively. It will be of interest to researchers, engineers, postgraduate, graduate and undergraduate students in various disciplines alike. The reader is provided with the full qualitative and quantitative assessment for the materials, which could be applied in various engineering devices and environmental conditions at ultra-high temperatures, on the basis of the latest updates in the field of physics, chemistry, materials science, nanotechnology and engineering.
Author : Anonim
Publisher : Unknown
Page : 1132 pages
File Size : 40,7 Mb
Release : 1973
Category : Nuclear energy
ISBN : UOM:39015026176118
Author : Peter L. Raffo
Publisher : Unknown
Page : 32 pages
File Size : 40,5 Mb
Release : 1965
Category : Heat resistant alloys
ISBN : UIUC:30112106774240
Author : Anonim
Publisher : Unknown
Page : 320 pages
File Size : 46,5 Mb
Release : 1966
Category : Nuclear reactors
ISBN : UOM:39015095087352