Problem $9.$ Cold and Hot Working Processes and Mechanical Properties

We wish to produce a $0\mathrm{.}3-$in$.$ thick plate of $3105$ aluminum having a tensile strength of at least $25,000$ psi and a $\backslash \%$ elongation of at least $5\backslash \%($See Figure $8-24).$ The original thickness of the plate is $3$ in $.$ The maximum cold work in each step is $\backslash (80\backslash \%\backslash ).$

a$)$ Describe the cold working and annealing steps required to make this product.

b$)$ Compare this process with what you would recommend if you could do the initial deformation by hot working.

Figure $8-24.$ The effect of percent cold work on the properties of a $3105$ aluminum alloy