3 edition of Dispersion Strengthening of Internally Oxidized Iron-Aluminum Alloys. found in the catalog.
Dispersion Strengthening of Internally Oxidized Iron-Aluminum Alloys.
United States. Bureau of Mines.
|Series||Report of investigations (United States. Bureau of Mines) -- 7686|
|Contributions||Copeland, M., Mcbee, W.|
The TiO2 dispersion effectively increases the yield strength of Cutitania alloys by a factor of five to ten over that of pure copper. Good correlation can be made between the yield strengths and the Orowan mechanism for dispersion strengthening. Alloys with Ti concentrations of 1 wt. pct or less are ductile (15 - 30% elongation). Engineering Strength: Oxide Dispersion for Bulk Alloys Fig. 1. Metals like iron and aluminum make up much of the modern world around us – from cars to wind-energy turbines – because they are strong, lightweight and cost-efficient materials.
HAYNES ® NS ® alloy was developed by Haynes International Inc. for high-temperature structural applications with a dual manufacturing approach in mind: the fabrication of components in the readily weldable and formable mill-annealed condition, and their subsequent strengthening by means of a gas nitriding process. The alloy was designed to be conducive to dispersion strengthening . In order to increase strength of copper at high temperatures, precipitation hardening and oxide dispersion strengthening or both of these mechanisms can be used. GLIDCOP AL (C) is primarily designed for applications requiring the highest elevated temperature strength coupled with relatively high electrical and thermal conductivities.
Internal oxidation of zirconium alloys is discussed with the view to producing dispersion-strengthened alloys for reactor use. A model for internal oxidation is compared with measurements on internally oxidized zirconium-yttrium alloys. Deviations from . the development of materials with increasingly high temperature capabilities. Oxide Dispersion-Strengthened (ODS) alloys have excellent potential for use in next-generation high-temperature applications where superior creep strength and oxidation resistance compared to current alloys .
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Additional Physical Format: Online version: Copeland, Mark I. Dispersion strengthening of internally oxidized iron-aluminum alloys.
[Washington, D.C.]: U.S. Dept. Dispersion strengthening of internally oxidized iron-aluminum alloys / By Mark I. Copeland, William C. McBee, Albany Metallurgy Research Center (U.S.).
and United States. Bureau of Mines. wrought non-ODS) alloy of similar elemental composition. The compositions as deter- mined for both ODS and non-ODS counterpart alloys are given in table I along with other microstructural data. MA is strengthened by solid solution and by the dispersion.
In addition, an elon. Dispersion strengthening of copper by internal oxidation of rapidly solidified Cu-RE alloys Ivan Anzel a ∗, Albert C. Kneissl b, Ladislav Kosec c, Rebeka Rudolf a and Leo Gusel a a Faculty of Mechanical Engineering, University of Maribor, Maribor, SloveniaCited by: 6.
(A 5) N. Hansen, Dispersion Strengthening of Aluminium Aluminium-Oxide Products. Acta Met. 18 () (A6) N. Hansen, Strengthening of Aluminium by a Three-Dimensional Net work of Aluminium-Oxide Particles.
Acta Met., 17 () (A 7) N. Hansen Oxide Dispersion Strengthening in Sintered Aluminium ProFile Size: 3MB. This paper briefly summarizes studies related to the oxidation of Fe-Al alloys.
Emphasis is placed on oxide phase composition, morphology, and the development of protective α-Al2O3 scales on oxidation-resistant Fe-Al alloys both with and without ternary additions.
Oxide dispersion strengthened alloys are produced by mechanical alloying nanoparticles of ytterbium-oxide (Y2 O 3) with powders containing nickel and chromium. Depending on the alloy, other elements are added including aluminum, titanium, tungsten, molybdenum, tantalum, carbon, boron, and.
Abstract: Bi tapes sheathed in dispersion-hardened Ag alloys that contain Mg have not generally achieved superconducting properties comparable to those of tapes sheathed in pure Ag, factors involved in the internal oxidation process, such as oxygen diffusion and evolution of the grain structure of the sheath, appear to affect phase development of the Bi superconductor, Ag and Ag/ at.%.
ZrO2 dispersion-strengthened Pt-3Rh alloy was prepared by powder metallurgy-internal oxidation-sintering. The high temperature properties were tested and analyzed.
dispersion strengthened GRCop, GlidCop Al and GlidCop Al are not affected by brazing significantly . Figure 7. Yield strength vs. temperature of some Cu alloys (Reproduced from Loewenthal ).
Summary High strength copper alloys are widely used in microelectronics, aerospace and defense industries as. Oxide dispersion strengthened alloys consist of a metal matrix with small oxide particles dispersed within it.
They are used for high temperature turbine blades and heat exchanger tubing. Alloys of nickel are the most common but work is being done on iron aluminum alloys. ODS steels are used in nuclear applications.
ODS materials are used on space crafts as a layer designed to protect the vehicle. Ivan Anzel, Albert C. Kneissl, Alojz Krizman, and Rebeka Rudolf (). Dispersion strengthening of copper by internal oxidation of rapidly solidified Cu–RE alloys.
DISPERSION STRENGTHENING The strength and hardness in some metal alloys may be enhanced by the presence of extremely small and uniformly dispersed particles within the original phase matrix.
Whether introduced as insoluble particles in powder compaction (dispersion strengthening), or as precipitates in a solid state reaction (precipitation or age. The formation of al2o3 dispersoids U and less in size in dilute iron-aluminum alloys by internal oxidation in wet hydrogen and dispersion strengthening of iron by application of the technique to iron powder were found to be feasible.
The internally oxidized Ag-based alloy single crystals containing nearly similar atomic fractions of Mg and Cd differ markedly in their strength values.
It is inferred that, besides the dispersion being on a finer scale in the Ag-Mg alloy (alloy A), MgO particles must exist in the constrained state and these internal strain fields could contribute substantially to the observed strengthening.
Rowcliffe, R. Bonesteel, and T. Tietz, “Strengthening of Niobium-Zirconium Alloys by Internal Oxidation”, paper presented at the Oxide Dispersion Strengthening Conference, Bolton Landing, New York, June 27–29, (to be published by Gordon and Breach).
Google Scholar. INTRODUCTION Dispersion Hardening: Hard particles: Mixed with matrix powder Consolidated Processed by powder metallurgy techniques Second phase – Very little solubility (Even at elevated temp.) No coherency So thermally Stable at very high temp. Resists: Grain growth Over aging Recrystallization Mobility of dislocation Different from particle Metallic Composites (Volume Fraction is 3 to 4% max.) (Does not affect stiffness) Examples: Al2O3 in Al.
When, some fifteen years ago, Irmann made his discovery of the Sintered Aluminium Products of high elevated-temperature strength, subsequently known as S.A.P, its importance was by no means confined to the potentialities of the new material alone; metallurgists became generally conscious of the possibility of strengthening metals with the aid of a finely dispersed, hard, and thermally stable.
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It also describes the nominal composition, microstructure, mechanical, physical, oxidation and hot-corrosion properties of different types of mechanically alloyed (MA) commercial alloys having nickel, iron, and aluminum-base alloy systems, namely, MAMAMAMA and MA.
Heat- Resistant Titanium with Intermetallic Frame-Dispersion Strengthening Kompan, A.T. Nazarchuk, and I.V. Protokovilov Titanium Alloys for High Temperature Oxidation Resistance Recent Development of Titanium and Its Alloys in Automotive Exhaust Applications Y.
.TY - CHAP. T1 - INTERCRYSTALLINE FRACTURE IN AN INTERNALLY OXIDIZED BCC ALLOY. AU - Carpenter, Ray. AU - Liu, C. T. PY - Y1 - N2 - Intercrystalline fracture resulting from tensile deformation at low temperature, defined here as a temperature low enough that diffusion effects can be ignored, has been observed in several age-hardenable alloys having either a bcc or fcc matrix structure.In this work, we studied the effect of Si on the microstructure and tensile properties of the as-cast AlCuMnFe alloys which were produced by casting with or without applied pressure.