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Author : Joseph Goldstein
Publisher :
ISBN 13 :
Total Pages : 62 pages
Book Rating : 4.:/5 (327 download)
Download or read book The Effect of Annealing on the Mechanical Properties of Tungsten written by Joseph Goldstein and published by . This book was released on 1960 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Tibor Stefansky
Publisher :
ISBN 13 :
Total Pages : 56 pages
Book Rating : 4.:/5 (331 download)
Download or read book The Effect of Recovery Annealing on the Mechanical Properties of Tungsten written by Tibor Stefansky and published by . This book was released on 1961 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : M. I. Gavrilyuk
Publisher :
ISBN 13 :
Total Pages : 1 pages
Book Rating : 4.:/5 (227 download)
Download or read book Studying the Effect of Process Annealing on the Structure and Properties of Casted Tungsten written by M. I. Gavrilyuk and published by . This book was released on 1962 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of annealing temperature on the mechanical properties, microstructure and structure of cast W fractures was investigated. The absence of formation of foreign phases on the boundaries of grain of recrystallized (processed) metal was established. It has been assumed that brittleness of W and metals analogous to it in recrystallized state is connected with the phenomenon of intercrystallite internal adsorption of admixtures. (Author).
Author : F. F. Schmidt
Publisher :
ISBN 13 :
Total Pages : 154 pages
Book Rating : 4.3/5 (91 download)
Download or read book The Engineering Properties of Tungsten and Tungsten Alloys written by F. F. Schmidt and published by . This book was released on 1963 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of a state-of-the-art survey covering tungsten and ten of its alloys are presented. All data are given in tabular and graphical form covering some of the more important physical, mechanical, and metallurgical properties for each material. References are given at the conclusion of each material section.
Author : Friedrich G. Ostermann
Publisher :
ISBN 13 :
Total Pages : 26 pages
Book Rating : 4.:/5 (227 download)
Download or read book On the Effects of Annealing and Grain Size in Powder-metallurgy Tungsten written by Friedrich G. Ostermann and published by . This book was released on 1963 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mechanical properties of powder-metallurgy tungsten were studied at low temperatures. Particular emphasis was placed on the effects of annealing temperatures and grain size on the ductile-brittle transition behavior. While room-temperature hardness and grain size were little sensitive to temperature changes within the 1500 to 2300 C range, tensile behavior was markedly influenced. Variation of grain size was achieved by straining and annealing. Grain size effects were evaluated in terms of the Petch-analysis. Fracture was at all times predominantly intergranular. The results of this investigation suggest that the high ductile-brittle transition temperature of tungsten is not sufficiently explained by strong dislocation-impurity atom interaction.
Author : William D. Klopp
Publisher :
ISBN 13 :
Total Pages : 42 pages
Book Rating : 4.:/5 (31 download)
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,
Author : J. L. Ratliff
Publisher :
ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.3/5 (91 download)
Download or read book A Compilation of the Tensile Properties of Tungsten written by J. L. Ratliff and published by . This book was released on 1962 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Joseph R. Stephens
Publisher :
ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.:/5 (31 download)
Download or read book Effect of Oxygen on Mechanical Properties of Tungsten written by Joseph R. Stephens and published by . This book was released on 1963 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of oxygen on the mechanical properties of commercial polycrystalline tungsten and zone-refined single-crystal tungsten was evaluated by means of tensile tests of oxygen-doped specimens in the ductile-to-brittle transition temperature range. The effect of oxygen as a surface oxide that might be encountered in normal working and forming operations was evaluated by means of a three-point loading bend test at room temperature. Oxygen doping of the polycrystalline and single-crystal tensile specimens was accomplished by equilibrating the specimen and tungsten oxide powder in a sealed tungsten capsule at high temperatures. A desired oxygen concentration could be achieved by varying the time of doping in the temperature range of 3000 to 3600 F. Results showed that the commercial recrystallized rods containing 4 parts per million (ppm) oxygen had a ductile-to-brittle transition temperature (based on 50-percent reduction in area) of 4500 F. Increasing the oxygen concentration to 10, 30, and 50 ppm increased the transition temperature to 6600, 840, and 1020 F, respectively. The oxygen additions also produced a progressive lowering of the ultimate tensile strength. The mechanism for the effect of oxygen on the transition temperature and ultimate tensile strength is believed to be that of segregation of the oxygen atoms at the grain boundaries. The oxygen additions also caused a progressive lowering of the yield strength, which is believed to result from the interaction of oxygen with carbon atoms or other impurity atoms present in the tungsten lattice.
Author : F. F. Schmidt
Publisher :
ISBN 13 :
Total Pages : 164 pages
Book Rating : 4.:/5 (89 download)
Download or read book The Engineering Properties of Tungsten and Tungsten Alloys written by F. F. Schmidt and published by . This book was released on 1963 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of a state-of-the-art survey covering tungsten and ten of its alloys are presented. All data are given in tabular and graphical form covering some of the more important physical, mechanical, and metallurgical properties for each material. References are given at the conclusion of each material section.
Author : William D. Klopp
Publisher :
ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.:/5 (31 download)
Download or read book Mechanical Properties of a Tungsten -- 23.4-percent-rhenium -- 0.27-percent-hafnium -- Carbon Alloy written by William D. Klopp and published by . This book was released on 1971 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Westinghouse Electric Corporation. Westinghouse Lamp Division
Publisher :
ISBN 13 :
Total Pages : 334 pages
Book Rating : 4.E/5 ( download)
Download or read book Physical Metallurgy of Tungsten and Tungsten Alloys written by Westinghouse Electric Corporation. Westinghouse Lamp Division and published by . This book was released on 1961 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : L. S. Rubenstein
Publisher :
ISBN 13 :
Total Pages : 36 pages
Book Rating : 4.:/5 (31 download)
Download or read book Effects of Composition and Heat Treatment on High-temperature Strength of Arc-melted Tungsten-hafnium-carbon Alloys written by L. S. Rubenstein and published by . This book was released on 1968 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : M. Garfinkle
Publisher :
ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.:/5 (31 download)
Download or read book Superplasticity in Tungsten-rhenium Alloys written by M. Garfinkle and published by . This book was released on 1968 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Joseph R. Stephens
Publisher :
ISBN 13 :
Total Pages : 24 pages
Book Rating : 4.:/5 (31 download)
Download or read book Effects of Interstitial Impurities on the Low-temperature Tensile Properties of Tungsten written by Joseph R. Stephens and published by . This book was released on 1964 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study was undertaken to determine the effects of the interstitial impurities oxygen and carbon on the mechanical properties of polycrystalline tungsten and high-purity tungsten single crystals. Results of tensile tests showed that additions of both oxygen and carbon to polycrystalline tungsten produced a marked increase in the ductile to brittle transition temperature. Oxygen and carbon produced a much smaller increase in the transition temperature of the single-crystal specimens compared with equivalent amounts of impurities in the polycrystalline specimens. Addition of oxygen to polycrystalline tungsten lowered both the ultimate tensile strength and the yield strength, but had no measurable effect on the strength properties of single-crystal specimens. Carbon additions to both polycrystalline and single-crystal specimens did not affect the ultimate tensile strength; however, a large increase in the yield strength resulted. The results suggest that oxygen embrittlement in tungsten is caused by grain-boundary segregation, while carbon embrittlement results from an interaction between carbon atoms and dislocations within the tungsten lattice.
Author : Fred S. Hungerford
Publisher :
ISBN 13 :
Total Pages : 114 pages
Book Rating : 4.:/5 (37 download)
Download or read book Effect of Annealing Temperatures on Mechanical Properties of 70-30 Brass written by Fred S. Hungerford and published by . This book was released on 1926 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Peter L. Raffo
Publisher :
ISBN 13 :
Total Pages : 44 pages
Book Rating : 4.:/5 (31 download)
Download or read book Mechanical Properties of Solid-solution and Carbide-strengthened Arc-melted Tungsten Alloys written by Peter L. Raffo and published by . This book was released on 1966 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 1018 pages
Book Rating : 4.0/5 ( download)
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1975-07 with total page 1018 pages. Available in PDF, EPUB and Kindle. Book excerpt:
