Two identical metal sheets of 1 cm thickness is made out of the the same materia

Question

Two identical metal sheets of 1 cm thickness is made out of the the same material. These sheets are cold-rolled to reduce their thickness. As a result, final thickness of sheet A is measured to be 5 mm whereas the final thickness of sheet B is measured to be 2 mm.

a) Which of these sheets would you expect to have higher strength in the rolling direction? Explain.

b) Which of these sheets would you expect to have higher ductility through its thickness? Explain.

c) If both sheets are annealed at a temperature that is 40% of the melting temperature of the metal, which sheet is expected to have a higher strength at the end of the annealing process? Explain.

Explanation / Answer

as thickness of A is higher than thickness of B.so area of A is more than B.so stress in A is lower than stress in B.so A have higher strength.
and ductility is more whose stress is more so stress in B is more than A so ductility is higher of metal B

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