Download or read book Physical and Mechanical Properties of Columbium and Columbium base Alloys written by E. S. Bartlett and published by . This book was released on 1960 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Engineering Properties of Columbium and Columbium Alloys written by F. F. Schmidt and published by . This book was released on 1963 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of a state-of-the-art survey covering niobium and 18 of its most promising 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.
Download or read book Elevated temperature Mechanical Properties and Oxidation Resistance of Columbium and Its Alloys written by F. R. Schwartzberg and published by . This book was released on 1959 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Interstitial Impurity Levels on Mechanical Properties of Columbium at Low Temperatures written by M. D. Carver and published by . This book was released on 1961 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of Columbium Alloy WC3015 written by A. A. Tavassoli and published by . This book was released on 1971 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Study of Columbium base Alloys written by Renpei Yoda and published by . This book was released on 1967 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Columbium vanadium Binary Alloys for High temperature Service written by Herbert R. Babitzke and published by . This book was released on 1962 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aging Phenomena in Columbium base Alloys written by D. O. Hobson and published by . This book was released on 1962 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Availability and Mechanical Properties of High strength Steel Extrusions written by Robert John Fiorentino and published by . This book was released on 1960 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metallurgy of Molybdenum Niobium and Molybdenum niobium Alloys written by U.S. Atomic Energy Commission and published by . This book was released on 1963 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Oxygen and Nitrogen on Workability and Mechanical Properties of Columbium written by R. T. Begley and published by . This book was released on 1960 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Currently, considerable effort is being devoted to the development of columbium-base alloys for high-temperature structural applications. Because of its high melting point (2468 C), intermediate density (8.57 g per cu cm), generally good ductility, attractive high-temperature strength, and low ductile-brittle transition range, columbium has considerable potential as a base for high-temperature alloys. One of the difficulties associated with the melting, processing, and application of columbium is its reactivity with atmospheric gases, even at moderately elevated temperatures. The workability and mechanical properties of the metal are seriously affected by the gaseous impurity level. The work described in this paper was undertaken to provide data concerning the effect of oxygen and nitrogen additions on the hardness, workability, strain hardening characteristics, and recrystallization behavior of columbium. The solid solubility of oxygen in columbium is quite high compared to that of most of the other refractory metals. Seybolt [1] reported the primary solid solubility to be 0.25 and 1.0 per cent by weight at 775 and 1100 C respectively. Recent work by Elliott [2] indicates a solubility of 0.25 per cent by weight of oxygen at 500 C, and a maximum solubility of 0.72 per cent by weight at 1915 C. Three oxides, CbO, CbO2, and Cb2O5, exist in the system. A eutectic reaction occurs between the ?-columbium primary solid solution and CbO at 10.5 per cent by weight of oxygen and 1915 C. Oxygen has a pronounced effect on the room temperature hardness and tensile properties of columbium. Tottle [3] has reported that increasing the oxygen content of columbium from 0.03 to 0.41 per cent by weight raises the ultimate tensile strength from 41,000 to 131,250 psi, and the hardness from 87 to 331 diamond pyramid hardness. Several investigators [4,5,6] have observed repeated yielding and the return of the yield point on aging in columbium, which are indicative of strain aging. Earlier work by the authors [6] indicated that oxygen was the interstitial element responsible for the observed strain-aging phenomena.
Download or read book Introduction to Metals for Elevated temperature Use written by James Edward Campbell and published by . This book was released on 1961 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Elevated temperature Creep and Tensile Properties of Three Columbium base Alloys written by and published by . This book was released on 1962 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In work to develop materials for elevated temperature applications, binary niobium alloys containing either 2.37 wt% chromium, 3.34 wt% zirconium, or 5.21 wt% vanadium were fabricated to sheet by forging at 550 deg C and rolling at room temperature. All three alloys were completely recrystallized after 90% cold work (reduction in thickness) and a one hour anneal at 1150 deg C. Tensile tests on the annealed materials at 650, 800, 1000, 1150, and 1315 deg C indicated that chromium, zirconium, and vanadium are potent strengtheners of niobium. At 1000 deg C the 2.37 wt% chromium and the 5.21 wt% vanadium alloys had 0.2% offset yield strengths of 38,000 and 38,300 psi respectively. At 1315 deg C, the 3.34 wt% zirconium alloy had a 0.2% offset yield strength of 14,700 psi. Stresses to produce creep rates of 0.0001, 0.01, and 0.1% per hour were determined for all three alloys at 650, 800, and 1000 deg C. The vanadium alloy exhibited the greatest creep resistance, requiring stresses of 52,700, 40,000, and 15,500 psi to produce a creep rate of 0.001% per hour at 650, 800, and 1000 deg C respectively. This research indicated that significant improvement in the mechanical properties of niobium can be achieved by alloying without undue sacrifice of fabricability. (auth).
Download or read book Design Information on Nickel base Alloys for Aircraft and Missiles written by R. J. Favor and published by . This book was released on 1960 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physical and Mechanical Properties of Commercial Molybdenum base Alloys written by J. A. Houck and published by . This book was released on 1960 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Summary of Comparative Properties of Air melted and Vacuum melted Steels and Superalloys written by D. C. Ludwigson and published by . This book was released on 1960 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aerospace Structural Metals Handbook written by and published by . This book was released on 1989 with total page 828 pages. Available in PDF, EPUB and Kindle. Book excerpt:
