The following creep data were taken on an aluminum alloy at 400°C (750°F) and a constant stress of 25 MPa (3660 psi). Plot the data as strain versus time, and then determine the steady-state or minimum creep rate. Note: The initial and instantaneous strain is not included.
Time (min) | Strain | Time (min) | Strain |
0 | 0.000 | 16 | 0.135 |
2 | 0.025 | 18 | 0.153 |
4 | 0.043 | 20 | 0.172 |
6 | 0.065 | 22 | 0.193 |
8 | 0.078 | 24 | 0.218 |
10 | 0.092 | 26 | 0.255 |
12 | 0.109 | 28 | 0.307 |
14 | 0.120 | 30 | 0.368 |
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