Determine the relative amounts (in terms of volume fractions) of the phases for the alloys and temperatures given in Problem 10.8, parts a to c. The following table gives the approximate densities of the various metals at the alloy temperatures:
Metal | Temperature (°C) | Density (g/cm3) |
Ag | 900 | 9.97 |
Cu | 400 | 8.77 |
Cu | 900 | 8.56 |
Pb | 175 | 11.20 |
Sn | 175 | 7.22 |
Zn | 400 | 6.83 |
Problem 10.8
Cite the phases that are present and the phase compositions for the following alloys:
(a) 90 wt% Zn–10 wt% Cu at 400°C (750°F)
(b) 75 wt% Sn–25 wt% Pb at 175°C (345°F)
(c) 55 wt% Ag–45 wt% Cu at 900°C (1650°F)
(d) 30 wt% Pb–70 wt% Mg at 425°C (795°F)
(e) 2.12 kg Zn and 1.88 kg Cu at 500°C (930°F)
(f) 37 lbm Pb and 6.5 lbm Mg at 400°C (750°F)
(g) 8.2 mol Ni and 4.3 mol Cu at 1250°C (2280°F)
(h) 4.5 mol Sn and 0.45 mol Pb at 200°C (390°F)
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