Problem

Construct the hypothetical phase diagram for metals A and B between temperatures of 600°C...

Construct the hypothetical phase diagram for metals A and B between temperatures of 600°C and 1000°C given the following information:

• The melting temperature of metal A is 940°C.

• The solubility of B in A is negligible at all temperatures.

• The melting temperature of metal B is 830°C.

• The maximum solubility of A in B is 12 wt% A, which occurs at 700°C.

• At 600°C, the solubility of A in B is 8 wt% A.

• One eutectic occurs at 700°C and 75 wt% B–25 wt% A.

• A second eutectic occurs at 730°C and 60 wt% B–40 wt% A.

• A third eutectic occurs at 755°C and 40 wt% B– 60 wt% A.

• One congruent melting point occurs at 780°C and 51 wt% B–49 wt% A.

• A second congruent melting point occurs at 755_C and 67 wt% B–33 wt% A.

• The intermetallic compound AB exists at 51 wt% B–49 wt% A.

• The intermetallic compound AB2 exists at 67 wt% B–33 wt% A.

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