A cylindrical rod made of directionally solidified alloy CM 247 (1050 oC/16h/AC) is to carry a 10,000 N load at a temperature of 900° C and for a period of 300 hours. Using the Larson-Miller plot in Fig. 7.31, design the appropriate dimensions for the cross section.
A cylindrical rod made of directionally solidified alloy CM 247 (1050 oC/16h/AC) is to carry a 10,000 N load at a temperature of 900° C and for a period of 300 hours. Using the Larson-Miller plot in Fig. 7.31, design the appropriate dimensions for the cross section.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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A cylindrical rod made of directionally solidified alloy CM 247 (1050 oC/16h/AC) is to carry a 10,000 N load at a temperature of 900° C and for a period of 300 hours. Using the Larson-Miller plot in Fig. 7.31, design the appropriate dimensions for the cross section.
![Stress (MPa)
22.2
690
552
414
276
207
138
69
40
Larsen-Miller parameter, P = [T(°C) + 273] [20 + log(t)] × 10-3
23.3
25.5
26.7 27.8
28.9
30
24.4
Equiaxed MAR-M 247 MFB,
982°C/5 h/AC + 871°C/20 h/AC
and 871°C/20 h/AC only,
1.8 mm diameter specimens
DS MAR-M 247 longitudinal MFB,
1221°C/2 h/GFO, 982°C/5 h/AC,
871°C/20 h/AC, 1.8 mm diameter
production data
DS CM 247 LC, longitudinal,
1232°C/2 h +1260°C/20 h/AC
982°C/5 h/AC, 871°C/20 h/AC
3.2 and 4.1 mm diameter specimens
DS CM 247 LC longitudinal,
1232°C/2 h 1260°C/2 h/AC,
1079°C/4 h/AC, 871°C/20 h/AC
and 1232°C/2 h + 1260°C/20 h/AC,
1050°C/16 h /AC, 871°C/20 h/AC,
3.2 and 4.1 mm diameter specimens
44
42
48
50
52
54
46
Larsen-Miller parameter, P = [T (°F) + 460] [20+ log(t)] × 10-³
Figure 7.31
31.1
100
80
60
40
30
20
10
56
Stress (ksi)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ff046adb6-f6d1-4c9d-a636-31bb2599d4f9%2F6e3a41a0-c485-4fad-9218-040bdce5d80f%2Fc5xb22_processed.png&w=3840&q=75)
Transcribed Image Text:Stress (MPa)
22.2
690
552
414
276
207
138
69
40
Larsen-Miller parameter, P = [T(°C) + 273] [20 + log(t)] × 10-3
23.3
25.5
26.7 27.8
28.9
30
24.4
Equiaxed MAR-M 247 MFB,
982°C/5 h/AC + 871°C/20 h/AC
and 871°C/20 h/AC only,
1.8 mm diameter specimens
DS MAR-M 247 longitudinal MFB,
1221°C/2 h/GFO, 982°C/5 h/AC,
871°C/20 h/AC, 1.8 mm diameter
production data
DS CM 247 LC, longitudinal,
1232°C/2 h +1260°C/20 h/AC
982°C/5 h/AC, 871°C/20 h/AC
3.2 and 4.1 mm diameter specimens
DS CM 247 LC longitudinal,
1232°C/2 h 1260°C/2 h/AC,
1079°C/4 h/AC, 871°C/20 h/AC
and 1232°C/2 h + 1260°C/20 h/AC,
1050°C/16 h /AC, 871°C/20 h/AC,
3.2 and 4.1 mm diameter specimens
44
42
48
50
52
54
46
Larsen-Miller parameter, P = [T (°F) + 460] [20+ log(t)] × 10-³
Figure 7.31
31.1
100
80
60
40
30
20
10
56
Stress (ksi)
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