Archive for the ‘Aluminum Alloys’ Category
Wednesday, January 9th, 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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Tuesday, January 1st, 2008
Although in the past it was common practice to fully anneal the rod before wire drawing, continuous processing is now usually practiced, that is the as-worked rod with retained substructure goes directly to the cold forming. Drawing of the rod through 12 dies with 20% reduction per die brings the ...
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Thursday, December 27th, 2007
Aluminum castings have played an integral role in the growth of the aluminum industry since its inception in the late 19th century. The first commercial aluminum products were castings, such as cooking utensils and decorative parts, which exploited the novelty and utility of the new metal. Those early applications rapidly ...
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Thursday, December 27th, 2007
The main components of the alloys are magnesium and silicon to form Mg2Si. There is often an iron corrector such as manganese or chromium; occasionally small amounts of copper or zinc to improve the strength without substantial loss of corrosion resistance; boron in conductors to remove titanium and vanadium; zirconium ...
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Thursday, December 27th, 2007
Copper has been the most common alloying element almost since the beginning of the aluminum industry, and a variety of alloys in which copper is the major addition were developed. Most of these alloys fall within one of the following groups:
* Cast alloys with 5% Cu, often with small amounts ...
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Thursday, December 27th, 2007
Aluminum alloys are divided into two major categories: wrought and casting alloys. A further differentiation for each category is based primary on mechanism of property development. Many alloys respond to thermal treatment based on phase solubility. These treatments include solution heat treatment, quenching and precipitation, or age hardening.
In order to ...
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Thursday, December 27th, 2007
Material of complex specified properties, such as strength, ductility, fracture resistance and stress corrosion cracking resistance are required for the application in structures operating under heavy service loadings (like in aircraft and rocket industry) with prescribed high level of safety margin.
Aluminum alloys, due to convenient strength-to-density ratio, have found extensive ...
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Thursday, December 27th, 2007
Powder metallurgy (P/M) technology provides a useful means of fabricating net-shape components that enables machining to be minimized, thereby reducing costs. Aluminum P/M alloys can therefore compete with conventional aluminum casting alloys, as well as with other materials, for cost-critical applications. In addition, P/M technology can be used to refine ...
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Thursday, December 27th, 2007
Aluminum-lithium alloys have been developed primarily to reduce the weight of aircraft and aerospace structures. More recently, they have been investigated for use in cryogenic applications.
The major development work began in the 1970-1980, when aluminum producers accelerated the development of aluminum-lithium alloys as replacements for conventional airframe alloys. The lower-density ...
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Thursday, December 27th, 2007
The important alloying elements and impurities are listed here alphabetically as a concise review of major effects. Some of the effects, particularly with respect to impurities, are not well documented and are specific to particular alloys or conditions.
Antimony is present in trace amounts (0.01 to 0.1 ppm) primary in commercial-grade ...
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