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Author : Peter Schwarzkopf
Publisher :
ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.:/5 (321 download)
Download or read book Dispersion Strengthening of Molybdenum by Internal Oxidation written by Peter Schwarzkopf and published by . This book was released on 1957 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : W. L. O'Brien
Publisher :
ISBN 13 :
Total Pages : 24 pages
Book Rating : 4.3/5 (91 download)
Download or read book Strengthening Molybdenum by Powder Metallurgical Internal Oxidation of ZrMo2 written by W. L. O'Brien and published by . This book was released on 1974 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Facundo Rolf Morral
Publisher :
ISBN 13 :
Total Pages : 214 pages
Book Rating : 4.3/5 (91 download)
Download or read book Dispersion Strengthening of Metals written by Facundo Rolf Morral and published by . This book was released on 1977 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jelila Sarah Mohammed
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (565 download)
Download or read book A Study of High Temperature Reactions in Oxide-dispersion-strengthened Molybdenum at Reduced Oxygen Partial Pressures written by Jelila Sarah Mohammed and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Rare-earth oxides used in oxide dispersion strengthening are known to provide excellent strength and deformability over ordinary dispersion strengthening. It has been suggested that this may be due to the development of molybdate compounds instead of pure dispersed oxide particles. These alloys are produced by dispersing particles of certain rare-earth oxides in a molybdenum matrix and forming the mixture into a composite ingot. During the high-temperature consolidation process, the oxides are converted into rare-earth molybdates. With subsequent processing, these molybdate phases undergo deformation to form high-surface-area ribbons that serve to inhibit dislocation movement, thus improving the mechanical properties of the molybdenum matrix. It is still unknown what specific compounds, phases, and crystal structures provide these metal-oxides with their high strength and deformability. Because the molybdate phases are formed at high temperatures and low oxygen partial pressures, little is also known of the high-temperature phase equilibria of the REO-Mo systems under these conditions. The primary goal of this study was to deifine phase equilibria on systems of Mo with rare-earth oxides. The project aimed to identify compounds, phases, and specific oxidation states of molybdenum at various processing conditions. Systems of LaO1.5-MoOx, YO1.5-MoOx, and ZrO2- MoOx were investigated at temperatures of 1000ðC and 1200ðC, and O2 partial pressures ranging from 10-4 Pa to 10-13 Pa. Samples were prepared using powder starting materials of Mo and rare-earth oxides were combined in stoichiometric ratios. The samples were then electrically heated in a ceramic tube furnace in which the oxygen partial pressure was controlled by means of a combined flow of H2 and CO2 gas. Characterization was performed using x-ray diffraction, with published powder diffraction files for phase identification.
Author : Rointan Framroze Bunshah
Publisher :
ISBN 13 :
Total Pages : 276 pages
Book Rating : 4.E/5 ( download)
Download or read book A Survey of Dispersion Strengthening of Metals and Alloys ; [summary Technical Report written by Rointan Framroze Bunshah and published by . This book was released on 1959 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mark I. Copeland
Publisher :
ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.3/5 (91 download)
Download or read book Dispersion Strengthening of Internally Oxidized Iron-aluminum Alloys written by Mark I. Copeland and published by . This book was released on 1972 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : David L. Poerschke
Publisher :
ISBN 13 :
Total Pages : 60 pages
Book Rating : 4.:/5 (318 download)
Download or read book Mechanical Properties of Oxide Dispersion Strengthened Molybdenum Alloys written by David L. Poerschke and published by . This book was released on 2009 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lanthanum oxide dispersion strengthened (ODS) molybdenum has excellent high temperature properties but low ductility. The effect of heat treatment on the mechanical properties and formability of ODS-Mo sheet has been investigated in the temperature from 1500oC to 1800oC. Mechanical tests included three point bending, high temperature tensile testing, and hardness testing. Optical metallography, SEM, and TEM were used to evaluate the microstructure for each heat treatment condition. The 1500oC heat treatment temperature led to cracking due to incomplete transformation to a stress relieved structure. Samples treated at 1800$o$C produced 90o bends but the bend surfaces of samples treated for long time at this temperature were not smooth. Heat treated samples had lower YS and UTS than the as-rolled material. Grain growth along the rolling direction was faster than along transverse directions. This behavior is explained by the banding of oxide particles along the rolling direction.
Author :
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (455 download)
Download or read book Evaluation of Oxide Dispersion Strengthened (ODS) Molybdenum Alloys written by and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of fourteen (14) novel high-strength molybdenum alloy compositions containing a dispersion of very fine (1 micron diameter) oxide particles were consolidated using two proprietary powder metallurgy techniques. The developmental compositions were evaluated to determine the microstructural stability and mechanical properties from cryogenic ( -148 deg F) to elevated temperatures (4000 deg F) for material in the as-swaged (98% cold work) condition and for as-swaged material in the heat treated condition. Extremely fine oxide particle sizes (
Author : Richard J. Murphy
Publisher :
ISBN 13 :
Total Pages : 38 pages
Book Rating : 4.3/5 (91 download)
Download or read book Investigation of the Strengthening Mechanisms of Dispersion-strengthened Alloys written by Richard J. Murphy and published by . This book was released on 1962 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: -“
Author :
Publisher :
ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.:/5 (684 download)
Download or read book Mechanical Properties of Oxide Dispersion Strengthened (ODS) Molybdenum Alloys written by and published by . This book was released on 1998 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Oxide dispersion strengthened molybdenum, Mo-ODS, developed by a proprietary powder metallurgy process, exhibits a creep rupture life at 0.65T{sub m} (1,600 C) of three to five orders of magnitude greater than unalloyed molybdenum, while maintaining ductile fracture behavior at temperatures significantly below room temperature. In comparison, the creep rupture life of the Mo-50Re solid solution strengthened alloy at 1,600 C is only an order of magnitude greater than unalloyed molybdenum. The results of microstructural characterization and thermal stability and mechanical property testing are discussed.
Author :
Publisher :
ISBN 13 :
Total Pages : 18 pages
Book Rating : 4.:/5 (684 download)
Download or read book Evaluation of Oxide Dispersion Strengthened (ODS) Molybdenum and Molybdenum-rhenium Alloys written by and published by . This book was released on 1999 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Oxide dispersion strengthened (ODS) molybdenum alloys being developed for high temperature applications possess excellent high temperature strength and creep resistance. In addition they exhibit a ductile-to-brittle transition temperature (DBIT) in the worked and stress-relieved condition under longitudinal tensile load well below room temperature. However, in the recrystallized condition, the DBTT maybe near or above room temperature, depending on the volume fraction of oxide dispersion and the amount of prior work. Dilute rhenium additions (7 and 14 wt.%) to ODS molybdenum were evaluated to determine their effect on low temperature ductility. The addition of 7 wt.% rhenium to the ODS molybdenum did not significantly enhance the mechanical properties. However, the addition of 14 wt.% rhenium to the ODS molybdenum resulted in a DBTT well below room temperature in both the stress-relieved and recrystallized condition. Additionally, the tensile strength of ODS Mo-14Re is greater than the base ODS molybdenum at 1,000 to 1,250 C.
Author : William L. O'Brien
Publisher :
ISBN 13 :
Total Pages : 14 pages
Book Rating : 4.:/5 (253 download)
Download or read book Strengthening Molybdenum by Powder Metallurgical Internal Oxidation of ZrMo2 written by William L. O'Brien and published by . This book was released on 1974 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : United States. National Aeronautics and Space Administration
Publisher :
ISBN 13 :
Total Pages : 1318 pages
Book Rating : 4.:/5 (319 download)
Download or read book Technical Publications Announcements with Indexes written by United States. National Aeronautics and Space Administration and published by . This book was released on 1962 with total page 1318 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 614 pages
Book Rating : 4.:/5 (318 download)
Download or read book Report of Investigations written by and published by . This book was released on 1974 with total page 614 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Nicholas John Grant
Publisher :
ISBN 13 :
Total Pages : 44 pages
Book Rating : 4.:/5 (31 download)
Download or read book Oxide Dispersion Strengthened Alloys written by Nicholas John Grant and published by . This book was released on 1967 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Frederick E. Armstrong
Publisher :
ISBN 13 :
Total Pages : 614 pages
Book Rating : 4.F/5 ( download)
Download or read book Coal Mine Dust Incombustibles Content Analyzer Using a Gamma-ray Backscatter Technique written by Frederick E. Armstrong and published by . This book was released on 1974 with total page 614 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
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ISBN 13 :
Total Pages : 1396 pages
Book Rating : 4.3/5 (91 download)
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1975 with total page 1396 pages. Available in PDF, EPUB and Kindle. Book excerpt:
