Download or read book The Development and Evaluation of a Cobalt Base Oxidation Resistant Dispersion Strengthened Alloy written by and published by . This book was released on 1971 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research on Dispersion Strengthened Cobalt base Alloys written by A. L. Mincher and published by . This book was released on 1966 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cobalt-base alloys containing fine ThO2 dispersions were processed to round bar by powder metallurgy techniques and evaluated for physical and mechanical properties. The ThO2 dispersion increased the sluggishness of the allotropic transformation in cobalt. Strength at elevated temperature was improved by (1) increased ThO2, (2) a minor (0.2%) zirconium addition, and (3) increasing amount of secondary work. Oxidation resistance of the Co-ThO2 and Co-Ni-ThO2 alloys was similar to pure cobalt with scaling rates an order of magnitude greater than TD Nickel at 2200F. A chromium addition improved oxidation behavior. Preliminary evaluation on the chromium-containing alloys gave 2000 F tensile strengths of 10,000 psi or less, lower than on the alloys without chromium. Certain of these alloys with chromium recrystallized on high temperature annealing, and this was accompanied by an increase in 2000 F tensile strength. (Author).
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1972 with total page 958 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book STAR written by and published by . This book was released on 1973 with total page 920 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research on Dispersion Strengthened Cobalt base Alloys written by and published by . This book was released on 1967 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cobalt-base alloys strengthened with fine ThO2 dispersions were processed by powder metallurgy techniques to round bar and evaluated for physical and mechanical properties. Alloys were studied with varying levels of Ni (10 to 30%), Cr (10-30%), Fe (20%), ThO2 (1 to 4%), and Zr (0.2%). The Co-10Ni-2ThO2-0.2Zr alloy had the best combination of fabricability and high temperature strength in the non-chromium containing alloys. For 100 hour life in vacuum at 2000 F, rupture strength of 85% swaged bar of this alloy was>16,000 psi in swaged (find grained) bar and 15,000 psi in recrystallized bar. Tensile strength of annealed bar at 1400 F was improved by a molybdenum addition from 39,000 psi in the Co-10Ni-2ThO2-0.2Zr alloy to 104,000 psi in the Co-15Ni-15Mo-4Th02 alloy. High temperature strength of the oxidation-resistant chromium containing alloys increased with increasing grain size and with increasing ThO2 loading. The Co-Ni-Cr-ThO2 compositions gave the best high temperature strengths. In particular, the Co-20Ni-18Cr-4ThO2 alloy had tensile strength of up to 27,000 psi at 2000 F, and rupture strength was 15,000 psi for 100 hour life in air at 2000 F. The Co-20Fe-20Cr-4ThO2 alloy had a tensile strength of 16,400 psi at 2000 F. The Co-Cr-ThO2 alloys all had low tensile strength (
Download or read book Investigation of Processing Microstructures and Properties of Oxide Dispersion Strengthened Cobalt Alloy Extruded Shapes written by R. Grierson and published by . This book was released on 1977 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present study describes the development of an Oxide Dispersion Strengthened, Cobalt base alloy with the nominal composition of Co-20Ni-18Cr-4.5A1-1.75 Y2O3. The alloy was produced in extruded form from mechanically attrited powder. In the first part of this study a series of small scale (3in. dia.) extrusions were produced in order to evaluate various compositional and processing parameters. Based upon this study a single powder composition and three sets of extrusion parameters were chosen for use with full scale 7in. diameter extrusion billets. Dynamic (Mach 0.3), 2100 F oxidation tests showed the material to have excellent surface stability under these conditions, and hot corrosion testing at 1650 F showed it to be slightly superior to the analogous Ni base O.D.S. materials in this latter type of environment.
Download or read book NASA Scientific and Technical Publications written by and published by . This book was released on 1987 with total page 410 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 1972 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research and Technology Program Digest Flash Index written by and published by . This book was released on 1967 with total page 794 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research and Technology Program Digest written by United States. National Aeronautics and Space Administration and published by . This book was released on with total page 792 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Index to Metals R D Programs of Seven Aerospace Companies written by and published by . This book was released on 1963 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1974 with total page 1082 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Government Research Development Reports written by and published by . This book was released on 1968 with total page 840 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 908 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Technical Memorandum written by and published by . This book was released on 1988 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliography of Lewis Research Center Technical Publications Announced in 1977 written by Lewis Research Center and published by . This book was released on 1978 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: This compilation of abstracts describes and indexes over 780 technical reports resulting from the scientific and engineering work performed and managed by the Lewis Research Center in 1977. All the publications were announced in the 1977 issues of STAR (Scientific and Technical Aerospace Reports) and/or IAA (International Aerospace Abstracts). Documents cited include research reports, journal articles, conference presentations, patents and patent applications, and theses.
Download or read book Engine Structures written by and published by . This book was released on 1988 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
