Use the phase diagrams for Cu-Ni and Cu-Ag systems below to answer the question:Based on the mechanism, would you expect a solution containing 80 wt% Cu to be stronger if the remaining 20% of the alloy was Ni or Ag? Briefly explain ## Explanation of Phase Diagrams### Left Diagram: Copper-Nickel (Cu-Ni) Phase Diagram- **Axes**: - X-Axis: Composition (weight percent Nickel, Ni) ranging from 0% to 100% - Y-Axis: Temperature in degrees Celsius, ranging from 1000°C to 1600°C- **Lines**: - **Liquidus Line**: The upper curve connecting the liquid phases. - **Solidus Line**: The lower curve connecting the solid phases.- **Phases**: - Above the liquidus line is the **Liquid** phase. - Between the liquidus and solidus lines is the **α + L (liquid and alpha)** phase, indicating a mixture. - Below the solidus line is the **α (alpha)** phase, which is solid.- **Key Temperatures**: - At the left end (Copper-rich), the melting point is 1085°C. - At the right end (Nickel-rich), the melting point is 1453°C.### Right Diagram: Silver-Copper (Ag-Cu) Phase Diagram- **Axes**: - X-Axis: Composition (weight percent Silver, Ag) ranging from 0% to 100% - Left Y-Axis: Temperature in degrees Fahrenheit, ranging from 0°F to 2400°F - Right Y-Axis: Temperature in degrees Celsius, ranging from -20°C to 1400°C- **Lines**: - **Liquidus Line**: The upper boundary of the liquid phase. - **Solidus Line**: The line indicating the boundary of the complete solid phase.- **Phases**: - **Liquid**: The region above the liquidus line where the material is completely molten. - **α + L (alpha and liquid)**: Partially molten, with both solid and liquid phases. - **α (alpha)**: Below the solidus line on the left; solid phase rich in copper. - **β (beta)**: Below the solidus line on the right; solid phase rich in silver. - **α + β (alpha and beta)**: Region where both α and β solid phases coexist.- **Key Temperature**: - Eutectic point at 779°C (1434°F), where liquid coexists with solid α

The strength of copper, nickel, and silver is 20 ksi, 8.56 ksi, and 6.52 ksi respectively. The purpose of alloying is to make parent metal strong at every point in the phase diagram. The melting point of the parent metal also get change when making an alloy with other metal but it solely depends on the composition of alloying metal. So, if the parent metal has any wt % percentage of alloying metal, the alloy with that wt percentage will be stronger than the parent metal.In the Cu-Ni and Cu-Ag phase diagram, at 80 Wt% Cu and 20 wt% Ni or Ag, the Ni and Ag in Cu works as alloying elements and take place in the lattice of copper and makes a new crystal structure that becomes stronger than the crystal lattice of copper due to obstacle formed in the slip planes. As the strength of copper is more than nickel and silver. thus, the strength of alloy formed at 80 wt% copper and 20 wt% Ni or Ag will be greater than pure copper. If there was such case like alloying metal was having strength more than parent metal, then, in that case, the alloy may be less stronger than parent metal but there are no such cases studied in material science because the main aim of alloying is to give parent metal strength.