Duralumin - is a strong, hard, lightweight alloy of aluminum, widely used in aircraft construction, discovered and patented in 1910 by Alfred Wilm, a German metallurgist; it was originally made only at Düren in Germany. The original composition has been varied for particular applications; it may contain about 3 or 4 percent copper, 1/2 to 1 percent manganese, 1/2 to 1 1/2 percent magnesium, and, in some formulations, some silicon. After heat treatment and aging, these alloys are comparable to soft steel in strength.
Duralumin alloys are relatively soft, ductile, and workable in the normal state; they may be rolled, forged, extruded, or drawn into a variety of shapes and products. Their light weight and consequent high strength per unit weight compared to steel suit them for aircraft construction. Because duralumin loses strength in welding, a special laminated sheet form called alclad is used for aircraft construction; it has thin surface layers of pure aluminum or a corrosion-resistant aluminum alloy covering the strong duralumin core.
It is used for making aircraft frames
It is used for making the frames of automobiles and speedboats
It is used for making household articles
It has an excellent strenght to weight ratio, having a good strenght while being lightweight; allowing applications of aircraft and vehicle structures. It is extremely tough and hard, with a high resistance to stress - corrosion and cracking. Furthermore duralumin machines and casts well with a high performance in extreme temperatures.
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Duralumin was created in 1909.
Duralumin contain 93,5 % aluminium.
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—Duralumin is very lightweight. It is reflective, ductile and impermeable. Duralumin can be shaped easily as it is a malleable metal. It is also a very good conductor of heat and electricity. Duralumin is odorless and because it reacts with the oxygen around it, it forms a layer of substance called aluminum oxide which is resistant to corrosion. Note: Duralumin is made mostly from aluminum, zinc, magnesium and a small percentage of copper.
duralumin, copper is added to the aliminium to make duralumin
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duralumin is low density alloy, it has a high strength to weight ratio making it ideal to use in aircrafts.
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