Subject Name :
22343 - MECHANICAL ENGINEERING
MATERIALS
Question 40 :
Duralium is used in
Musical instruments
Surgical instruments
Die casting
Springs
Answers
Answer:
Duralumin, strong, hard, lightweight alloy of aluminum, widely used in aircraft construction, discovered in 1906 and patented in 1909 by Alfred Wilm, a German metallurgist; it was originally made only at the company Dürener Metallwerke at Düren, Germany. (The name is a contraction of Dürener and aluminum.)
Answer:
The term is a combination of durable and aluminium. It is a strong, light weight alloy.
Explanation:
Duralumin (also called duraluminum, duraluminium, duralum, dural(l)ium, or dural) is a trade name for one of the earliest types of age-hardenable aluminium alloys. Duraluminium 2024 consists of 91-95% aluminium, 3.8-4.9% copper, 1.2-1.8% magnesium, 0.3-0.9% manganese and no more than 0.15% of other elements together.
However, the addition of copper improves strength, it also makes these alloys susceptible to corrosion. For sheet products, corrosion resistance can be greatly enhanced by metallurgical bonding of a high-purity aluminium surface layer. These sheets are referred to as alclad(corrosion resistant aluminium sheet with high melting point 500 degrees celsius, and are commonly used by the aircraft industry