Closure to “Discussions of ‘Prevention of Cyclic Thermal-Stress Cracking in Steam-Turbine Rotors’” (1964, ASME J. Eng. Power, 86, pp. 367–368)

1964 ◽  
Vol 86 (3) ◽  
pp. 368-368
Author(s):  
W. R. Berry ◽  
Ivar Johnsson
Keyword(s):  
Thermal Stress ◽  
Steam Turbine ◽  
Stress Cracking ◽  
Turbine Rotors

Prevention of Cyclic Thermal-Stress Cracking in Steam-Turbine Rotors

1964 ◽  
Vol 86 (3) ◽  
pp. 361-367 ◽  
Author(s):  
W. R. Berry ◽  
Ivar Johnsson
Keyword(s):  
High Pressure ◽  
Thermal Stress ◽  
Steam Turbine ◽  
Outer Surface ◽  
Recent Experience ◽  
High Pressure Steam ◽  
Stress Cracking ◽  
Pressure Steam ◽  
Turbine Rotors ◽  
Stress Fatigue

Recent experience with cracking of the outer surface of load-cycled, high-pressure, steam-turbine rotors is analyzed as a thermal stress-fatigue problem. Cyclic strains are evaluated as a function of the operating transient and of the detailed rotor geometry. Operating recommendations are given with the aim of reducing the incidence of such cracking.

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