Question $1(10$ Points$)$

ME$425$ HWA $3$

After point u $,$ why is the stress decreasing with increasing strain?

Question $2(10$ Points$)$

In the elastic region, what is relation between stress and

Question $3(10$ Points$)$ A steel specimen has $0.$ of Carbon by weight. Its temperature is raised frc $70F$ to $1900F$ thrs equilibrium heating. Wh are the phases of the st specimen at $1900F?$

Question $4(10$ Points$)$

A steel specimen has $0\mathrm{.}10\%$ of Carbon by weight. Its temperature is raised from $70F$

Question $5(10$ Points$)$ to $1500F$ through A steel specimen has $0\mathrm{.}30\%$ of Carbon by weight. At $1414F$ equilibrium heating. What are what are the phases of the steel the phases of the steel specimen and what are their proportions? specimen at $1500F?$