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Fluid Mechanics and Thermodynamics of Turbomachinery, 5e

Fluid Mechanics and Thermodynamics of Turbomachinery, 5e

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118 <strong>Fluid</strong> <strong>Mechanics</strong>, <strong>Thermodynamics</strong> <strong>of</strong> <strong>Turbomachinery</strong><br />

smax /rm 10 4 ¥m 2 /s 2<br />

6<br />

4<br />

2<br />

Aluminum alloys<br />

Nickel alloys<br />

Molybdenum alloys<br />

Cobalt alloys<br />

0 500 1000 1500<br />

FIG. 4.17. Maximum allowable stress for various alloys (1000hr rupture life) (adapted<br />

from Freeman 1955).<br />

s¥ 10 8 , Pa<br />

8<br />

6<br />

4<br />

2<br />

1,000<br />

10,000<br />

0.2%<br />

100<br />

0<br />

900 1000 1100 1200 1300 1400<br />

K<br />

100 hr<br />

1000 hr Creep<br />

Ultimate<br />

10 hrs<br />

FIG. 4.18. Properties <strong>of</strong> Inconel 713 Cast (adapted from Balje 1981).<br />

1%

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