The following data were obtained when a cold-worked metal was annealed.
(a) Estimate the recovery, recrystallization, and grain growth temperatures;
(b) recommend a suitable temperature for a stress-relief heat treatment;
(c) recommend a suitable temperature for a hot-working process; and
(d) estimate the melting temperature of the alloy.
Annealing Temperature (°C) | Electrical Conductivity (ohm–1? cm–1) | Yield Strength (MPa) | Grain Size (mm) |
400 | 3.04 × 105 | 86 | 0.10 |
500 | 3.05 × 105 | 85 | 0.10 |
600 | 3.36 × 105 | 84 | 0.10 |
700 | 3.45 × 105 | 83 | 0.098 |
800 | 3.46 × 105 | 52 | 0.030 |
900 | 3.46 × 105 | 47 | 0.031 |
1000 | 3.47 × 105 | 44 | 0.070 |
1100 | 3.47 × 105 | 42 | 0.120 |
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