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.
206) The following element can′t impart high strength at elevated temperature
Answer is:
magnesium
Explanation:
Related Engineering Materials MCQ with Answers
Answer is:
is also known as chilled cast iron and is obtained by cooling rapidly. It is almost unmachinable
Explanation:
White cast iron Is also known as chilled cast iron and is obtained by cooling rapidly. It is almost un-machinable
White cast iron is a cast iron without any alloy addition and with low Carbon and Si content such that the structure is hard brittle iron carbide with no free graphite.
A fast cooling rate prevents the precipitation of Carbon as graphite.