Question

Duralium is a mixture of:
(This question has multiple correct options)
(A) Copper
(B) Tin
(C) Aluminium
(D) Manganese

Answer 1

Hint: An alloy is a mixture of solid in solid with two or more elements out which is essential of metal. The various physical properties of metal change when two or more metals are added to the metal. Metals and alloys that can be fabricated into the desired shape by a hot or cold working process are known as powder metallurgy.

Complete step by step solution:
Generally, alloys are classified into two types:
(1) Ferrous alloys which the major component is iron and (2) non-ferrous alloys which are like Al, Cu, Sn, and Pb as principal alloying content.

Let us discuss the alloys of aluminium (Al),
Al is a lightweight element with high corrosion and non-toxicity. The properties of aluminium improved by alloying with elements like Mg, Cu, Sn, Ni, Mn, etc. The resultant alloys are lightweight and good corrosion resistance. The alloys of this metal have good mechanical and electrical properties.
The given duralumin is an example of Al alloys which is used in the automobile industry and this is Al and Cu alloy. Duralium consists of Cu: 3-4.5%; Mg: 0.4-1%; Mn : 0.3-0.6% . This one has good resistance from corrosion and high ductility. This alloy is also named as duralumin because it receives shock load and more durability.
So Duralium is a mixture of Copper, Aluminium, and Manganese.

Hence, the question has multiple correct options A, C, and D.

Note: The primary disadvantage of the Duralium, by the addition of Cu to the alloy, makes sensitivity to corrosion but the copper oxidizes. This is used in rolled, forged, extruded, or drawn into a variety of shapes and products. Compared to steel, due to lightweight with high strength per unit weight, this alloy is used in aircraft construction.