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Which of the following attributes explain why pure metals are not frequently used in engineering applications?

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Which of the following attributes explain why pure metals are not frequently used in engineering applications?

(a) Hardness

(b) Brittleness

(c) Softness

(d) Luster

I got this question during a job interview.

My question is from Fick’s Law, Carbon Steels topic in division Diffusion in Solids & Ferrous Materials of Engineering Material & Metallurgy

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The correct option is (c) Softness

To elaborate: Pure metals are soft and ductile, which is not ideal for most engineering applications. Therefore, alloys are used to fulfill the requirements. This explains why pure gold is mixed with impurities to make ornaments.

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