Oxide dispersion strengthened alloys

Table 7. Nominal Compositions of Oxide Dispersion Strengthened Alloys, wt %...

Oxidative damage, role of ascorbic acid in preventing, 25 769 Oxidative degradation, 70 682 of gasoline, 72 399-400 Oxidative dehydrogenation, 23 342-343 Oxidative pyrolysis, 27 466 Oxidative stability, of olefin fibers, 77 229 Oxidative stability test, 72 400 Oxide crystal glass-ceramics, 72 641 Oxide-dispersion-strengthened alloys, 77 103-104... 

Mechanical alloying was originally developed in the late 1960s at the International Nickel Company as a means of manufacturing oxide dispersion strengthened alloys for aerospace applications. Since then, the process of mechaiucal alloying... 

The objective of the cast dispersion reinforcement approach was to develop an affordable, thermally stable, high-volume, oxide dispersion-strengthened alloy. The development of cast nano-oxide dispersion... 

An ability to build coded heat exchangers in a variety of nickel-based alloys, oxide dispersion strengthened alloys (ODS) and ceramic materials to address the temperature, life and corrosion issues associated with these demanding duties. 

Lowell, Carl E. Deadmore, Daniel L. Whittenberger, Daniel, J. (1982). Long-term high-velocity oxidation and hot corrosion testing of several NiCrAl and FeCrAl base oxide dispersion strengthened alloys. Oxidation of Metals, Vol. 17, Nos. 3, pp. 205-221, ISSN 15734889... 

Lead bismuth eutectic Lead-cooled fast reactor Liquid metal embrittlement Oxide dispersion-strengthened (alloy)... 

Mechanical properties of ferritic oxide dispersion-strengthened alloys... 

Quadakkers W J and Bennett M J (1994), Oxidation Induced Lifetime Limits of Thin Walled, Iron Based, Alumina Forming, Oxide Dispersion Strengthened Alloy Components, Mater Sci Tech, 10, 126-131. 

In the colloidal technique, the size and distribution of a dispersed thoria (Th02) phase is controlled to produce dispersion-strengthened alloys, primarily with nickel as the metallic phase. The so-called TD (thoria-dispersed) nickel has modest strength at room temperature, but retains this strength nearly to its melting point. TD nickel is 3 to 4 times stronger than pure nickel in the 870-1315°C range, and oxidation resistance of the alloy is better than that of nickel at 1100°C. 

Figure 5.82 The strength of different dispersion-strengthened alloys relative to the pure metal strength as a function of relative temperature. Preparation techniques include sintered aluminum powder (SAP), internal oxidation, and salt decomposition. Reprinted, by permission, from A. Kelly, Composite Materials, p. 62. Copyright 1966 by American Elsevier, Inc.

Reinforcement by a fine, homogeneous dispersion of second-phase nanoscale particles is an effective way to achieve strengthening and stability. Oxide dispersion strengthened (ODS) superalloys (Ni-base alloys such as... 

To finalize this section, I would like to mention that some papers delve into the studies of radiation tolerance of laminated composites with the thickness of layers not increasing tens of nanometers. By varying the thickness of such materials, we can investigate the main mechanisms of influence produced by interphase boundaries on the behavior of radiation defects. The irradiation of multilayered structures with the ions of inert gases first of all with helium allows for the modeling of processes that may arise during the reactor-induced irradiation of oxide dispersion-strengthened steels and alloys. 

There is extensive evidence that between 300 and 500 °C, oxide-dispersion-strengthened (ODS) refractory metal alloys (e.g.. Mo—LaaOs and Mo—Y2O3 grades) possess markedly reduced oxidation rates compared to the pure metals [1.133]. In-situ oxidation and evaluation of the binding state reveal that M0O2 dominates over M0O3 both for Mo and Mo-... 

In stainless steels for high-temperature applicahons, RE metals, chiefly yttrium, are used to improve the oxidation resistance. Yttrium is also used in ODS aUoys (Oxide Dispersion Strengthened). Yttrium oxide parhcles with grain size 50-1500 A are distributed in a matrix of some high-aUoy material. The finely dispersed Y Oj particles obstruct the dislocahon movement in the alloy and thus improve the creep properties at high temperature. The ODS ahoy is manufactured by extrusion or by HIP (Heat Isostatic Pressing). 

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