Download or read book Investigation of Some Niobium base Alloys written by Stan J. Paprocki and published by . This book was released on 1956 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Some Niobium based Alloys written by Stan J. Paprocki and published by . This book was released on 1956 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Initial Investigation of Niobium and Niobium base Alloys written by Henry A. Saller and published by . This book was released on 1955 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Hardness of Certain Niobium base Alloys at Elevated Temperatures written by I. I. KORNILOV and published by . This book was released on 1961 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation was made of the changes in the hardness of Nb and Nb alloys with temperature by the method of hot hardness. A series of Nb alloys were prepared from Nb (99.2%), Mo (99.9%), Zr (99.8%), Si(technical grade), Al (99.9%) and carbon by arc fusion. The specimens were remelted several times and homogenized in a TVV-2 vacuum furnace at 1600 C for 10 hr. Hardness measurements were carried out on a VIM-1 instrument under vacuum at 20, 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000 C. The impressing time of the diamond pyramid was 1 min. Three impressions were made on the specimen at each temperature. The diagonal of the impression was determined on a PMT-3 instrument for measuring microhardness. It was concluded that (1) Nb, like Ni, Fe, and Co can be hardened by alloying with components which form with it solid solutions with separation of the excess phase; (2) the method of hot hardness makes it possible to characterize the strength of alloys at elevated temperatures; and (3) multicomponent alloys with a high hardness at 1000 C require further investigation and testing for heat resistance by the standard method.
Download or read book Properties of Yttrium and the Rare Earth Metals written by Craig G. Kirkpatrick and published by . This book was released on 1962 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of Niobium base Alloys written by Richard T. Begley and published by . This book was released on 1960 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hardness Behavior of Binary and Ternary Niobium Alloys at 77 and 300 K written by Joseph R. Stephens and published by . This book was released on 1974 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Creep Strength of Niobium Alloys Nb 1 zr and Pwc 11 written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-08-16 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study is being conducted at NASA Lewis Research Center to determine the feasibility of using a carbide particle strengthened Nb-1 percent Zr base alloy to meet the anticipated temperature and creep resistance requirements of proposed near term space power systems. In order to provide information to aid in the determination of the suitability of the PWC-11 alloy as an alternative to Nb-1 percent Zr in space power systems this study investigated: (1) the long-time high-vacuum creep behavior of the PWC-11 material and the Nb-1 percent Zr alloy, (2) the effect of prior stress-free thermal aging on this creep behavior, (3) the effect of electron beam (EB) welding on this creep behavior, and (4) the stability of creep strengthening carbide particles. Titran, Robert H. Glenn Research Center NASA-TM-102390, E-5102, DOE/NASA/16310-13, NAS 1.15:102390 DE-AI03-86SF-16310; RTOP 586-01-11...
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1975 with total page 1146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Oxidation Studies of Niobium Base Alloys written by Per Kofstad and published by . This book was released on 1960 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metallurgical Studies of Niobium uranium Alloys written by John A. DeMastry and published by . This book was released on 1959 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: In a continuing program, fabrication characteristics, physical and mechanical properties, and corrosion behavior in air, CO2, NaK, water, and steam were studied for . binary niobium fuel alloys containing 10, 20, 30, 40, 50, and 60 wt.% uranium To evaluate the effects of two major impurities of niobium, oxygen, and zirconium, three niobium base stocks, differing according to the level of these impurities, were used for each alloy. The impurity combinations employed were 600 ppm oxygen and 0.74 wt.% zirconium, 700 ppm oxygen, and 0.17 wt.% zirconium, and 300 ppm oxygen and 0.02 wt.% zirconium, Representative specimens of these alloys retained their hardness up to 900 deg C The 10 and 20 wt.% uraniuin alloys were successfully rorged at 2500 deg F and rolled at 1800 deg F to sheet. Fabrication characteristics of the remaining alloys are under investigation. The 0.2% offset yield strength of the 10 wt.% uranium alloy was 57,200 psi at room temperature and 36,900 psi at 1600 deg F. For the 20 wt.% uranium alloy it was 93,200 psi at room temperature and 71.000 psi at 1600 deg F. The corrosion life of all of the alloys in air at 572 deg F and in CO2 at 600 deg F was superior to that of unalloyed niobium. In 1000- hr exposures to 600 deg F water most of the alloys exhibited corrosion rates only two or three times greater than that of Zircaloy-2. All oi the alloys appear compatible with NaK at 1600 deg F. The impurity combinations employed in the base niobium appeared to have no effect on the corrosion behavior and mechanical properties of the alloys. (auth).
Download or read book Fundamental and Applied Research and Development in Metallurgy written by A. L. Geary and published by . This book was released on 1963 with total page 78 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 Protection of Refractory Metals for High Temperature Service written by B. F. Brown and published by . This book was released on 1960 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: The vapor pressure of each of the niobium-zinc compounds was measured as a function of temperature. The kinetics of formation of the niobiumzinc compounds on pure niobium from zinc vapor were investigated, and oxidation tests were made on several coatings applied with zinc vapor. The mechanisms involved and the kinetics of the removal of interstitial impurities from niobium by the niobium-zinc compounds were also studied. Further studies of the effects of alloying elements added to the zinc bath used to coat niobium by the dip process confirmed that small amounts of nickel and aluminum in the proper combination are beneficial. (Author).
Download or read book ERDA Energy Research Abstracts written by United States. Energy Research and Development Administration and published by . This book was released on with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Catalog of Technical Reports written by United States. Dept. of Commerce. Office of Technical Services and published by . This book was released on with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Government Research Reports written by and published by . This book was released on 1964 with total page 2180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
