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A Mg-Pb alloy contains 55 wt% Pb – 45 wt% Mg. Assuming that analysis of this alloy is being carried out near the eutectic temperature (465 °C).

a. Determine the mass fractions of total α and total Mg2Pb, just below the eutectic temperature.

b.Determine the mass fractions of primary α and primary Mg2Pb, just above the eutectic temperature.

c.Determine the mass fractions of eutectic α and eutectic Mg2Pb.

d. If the alloy is now heated to 500 °C, what are the mass fractions of primary α and

liquid?

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