I know that the first two options are wrong. I need help figuring out which one

Question

I know that the first two options are wrong. I need help figuring out which one is correct.

Question 7 0/ 2pts Consider the data provided below 120 800 1040 Steel 700 100 600 80 500 400 Brass60 Copper 300 40 200 20 100 0 10 20 3040 50 60 70 Percent cold work Recalling that most brass for structural use is a single-phase alloy of Cu and Zn, what is the primary reason why brass is stronger than copper when comparing any two pieces of these materials that feature the same level of prior cold-working land presumably the same grain size)? · Brass leverages precipitation hardening Brass has a lower dislocation density than copper Brass leverages solution hardenine Copper cannot be cold-worked

Explanation / Answer

Brass is substitutional solid-solution of Cu and Zn. Due to presence of solute atoms (Zn atoms in this case) dislocation movement is more difficult and more stress is required for further deformation. Hence, Brass is stronger than copper.

So, right option will be C (Brass leverages solution hardening)

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