Archive for the ‘Aluminum Alloys’ Category
Tuesday, February 19th, 2008
Aluminum alloys have numerous technical advantages that made them one of the dominant structural material families of the 20th century. Aluminum has low density (2.71 g/cm3) compared with competitive metallic alloy systems. It also has good inherent corrosion resistance because of the continuous, protective oxide film that forms very quickly ...
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Tuesday, February 19th, 2008
Magnesium alloys usually are heat treated either to improve mechanical properties or as means of conditioning for specific fabricating operations. The type of heat treatment selected depends on alloy composition and form (cast or wrought), and on anticipated service conditions.
Magnesium alloys usually are heat treated either to improve mechanical properties ...
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Tuesday, February 19th, 2008
Lead is normally considered to be unresponsive to heat treatment. Yet, some means of strengthening lead and lead alloys may be required for certain applications. Lead alloys for battery components, for example, can benefit from improved creep resistance in order to retain dimensional tolerances for the full service life. Battery ...
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Tuesday, February 19th, 2008
In heat treating of tin-rich alloys, it is difficult to secure an effective and permanent degree of hardening. Tin melts at 232°C (505 K), and therefore room temperature (about 295 K) is well over one-half the absolute melting point. It follows that high-temperature behavior such as recrystallization and recovery can ...
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Wednesday, January 23rd, 2008
Aluminum alloys have numerous technical advantages that made them one of the dominant structural material families of the 20th century. Aluminum has low density (2.71 g/cm3) compared with competitive metallic alloy systems. It also has good inherent corrosion resistance because of the continuous, protective oxide film that forms very quickly ...
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Wednesday, January 23rd, 2008
Strain hardening is a natural consequence of most working and forming operation aluminum and its alloys. In pure aluminum and the non-heat-treatable aluminum-manganese and aluminum-magnesium alloys, strain hardening increases the strengths achieved through solid solution and dispersion hardening. In heat treatable alloys, strain hardening not only supplements the strengths achieved ...
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Wednesday, January 23rd, 2008
The internal structural changes produce substantial changes in the mechanical properties of aluminum and its alloys. Tensile properties are among those most affected.
Work-hardening curves for several non-heat-treatable alloys illustrate the increase in strength that accompanies cold work. This increase is obtained at the expense of ductility, as measured by the ...
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Friday, January 11th, 2008
Among the specific contributions and potentials of rapid solidifications are: increased solid solubility, minimization of segregation, highly refined grain size, modification or elimination of segregation phases, possibility of glass formation and production of new metastable microcrystalline structures.
Corresponding improvements have been achieved in mechanical, corrosive, magnetic and other properties, higher ultimate ...
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Thursday, January 10th, 2008
Aluminum alloys have numerous technical advantages that made them one of the dominant structural material families of the 20th century. Aluminum has low density (2.71 g/cm3) compared with competitive metallic alloy systems. It also has good inherent corrosion resistance because of the continuous, protective oxide film that forms very quickly ...
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Thursday, January 10th, 2008
A commercial 2024 aluminum alloy and a modified 2024 alloy containing Zr and V were subjected to a variety of thermomechanical processing (TMP) treatments to produce different grain structures, dislocation substructures and precipitate distributions.
Materials whose microstructures contained a dislocation substructure and spheroidized S precipitates had the lowest creep strengths. The ...
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