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Mechanical Engineering · Q5

Engineering Materials

Engineering and GATE · Mechanical Engineering · question 5

Q5

The following element can't impart high strength at elevated temperature

A.
Manganese
B.
Magnesium
Answer
C.
Nickel
D.
Silicon

Answer: Option B

Solution

Answer: Option B
Solution:
The strength, hardness, and modulus of elasticity of magnesium-base materials decrease with increasing temperature. Also, the elongation increases with rising temperature up to just below the melting point where it drops to nearly zero
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