The tensile and creep response of three P/M processed Al-Fe-Ni dispersion-strengthened alloys has been evaluated at temperatures up to 400 C; dispersoid FeNiAl9 volume fractions were 0.19, 0.25 and 0.32. Ambient temperature strength increases with increasing volume fraction of dispersoid and decreases with dispersoid size for a given volume fraction. Strengthening at room temperature in these alloys is primarily due to the fine grains stabilized by the dispersoids. The observed ...
This paper concerned mmc in some important way and contained information about, utilized, or discussed these subjects: basic topics:, dr mmc, mmc, review materials and material types:, (tic)p/al, al matrix, in situ composites, particulates, tic particulates, tic/al material characteristics and data fields:, interfacial energy, interparticulate spacings manufacturing:, castings, direct chill castings, solidifications miscellaneous and special technical terms:, alcoa, in situ, interparticle spacings (see also interparticulate spacings), particulate segregations, segregations.
This paper concerned mmc in some important way and contained information about, utilized, or discussed these subjects: basic topics:, data, dr mmc, mmc, mmc data materials and material types:, (sic)p/al, al alloys, al matrix, cu/w, sic particulates, sic/al material characteristics and data fields:, bending strength data or flexural strength data, cte, cte data, density, density data, flexural strength and bending strength, mechanical properties, modulus data, physical properties, thermal conductivity, thermal ...
The historic development of aluminum powder metallurgy dates back to the early 1900's with initial flake powder production and has matured to the present day production of viable aerospace alloys. Primary powder production and processing techniques, such as atomization and mechanical alloying are reviewed. Processing-microstructure-property relationships in four classes of high performance powder metallurgy (P/M) aluminum alloys are considered. These are (Aluminum-Iron-Cobalt, Aluminum-Iron-Nickel) high strength alloys (Aluminum-Zinc-Magnesium, copper-cobalt); high specific ...
The last fifteen years have been marked by considerable changes in aeronautical materials. one of the main areas of change has been a notable lightening of the structures employed in aircraft design, thereby increasing specific thrust, of principal concern in military aeronautics, for both aircraft and helicopters. reduction in weight has been achieved in a number of ways; mainly through the increasing use of polymer matrix composites, from the initial ...
An Al-6.2Ni-5.9Fe (wt.%) alloy was formed from air-atomized powder, which was vacuum hot pressed to full density followed by hot extrusion. Tensile tests were run on the extruded billets at RT, 200, 300, 350, and 400 C. Constant load creep tests were run at 250, 350, 375, and 400 C at stress levels from 35 to 207 MPa (5-30 ksi). About 60% of the ambient strength remains up to about ...
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