scholarly journals Effect of Corrosion on the Low-cycle Fatigue Strength of Steels used in Frequent Start-up Power Generation Steam Turbine

2015 ◽  
Vol 133 ◽  
pp. 528-534 ◽  
Author(s):  
Mohamed EL May ◽  
Nicolas Saintier ◽  
Olivier Devos ◽  
Alexia Rozinoer
Keyword(s):  
Power Generation ◽  
Fatigue Strength ◽  
Steam Turbine ◽  
Low Cycle Fatigue ◽  
Cycle Fatigue ◽  
Start Up

Influence of Creep on Low-Cycle Fatigue Life Assessment of Ultra-Supercritical Steam Turbine Rotor

2014 ◽  
Author(s):  
W. Z. Wang ◽  
J. H. Zhang ◽  
H. F. Liu ◽  
Y. Z. Liu
Keyword(s):  
High Temperature ◽  
Steam Turbine ◽  
Fatigue Damage ◽  
Low Cycle Fatigue ◽  
Turbine Rotor ◽  
High Temperature Creep ◽  
Cycle Fatigue ◽  
Term Operation ◽  
Start Up

Linear damage method is widely used to calculate low-cycle fatigue damage of turbine rotor in the long-term operation without fully considering the interaction between creep and low cycle fatigue. However, with the increase of steam turbine pressure and temperature, the influence of high-temperature creep on the strain distribution of turbine rotor becomes significant. Accordingly, the strain for each start-up or shut-down process is different. In the present study, the stress and strain during 21 iterations of continuous start-up, running and shut-down processes was numerically investigated by using the finite element analysis. The influence of high-temperature creep on low cycle fatigue was analyzed in terms of equivalent strain, Mises stress and low cycle fatigue damage. The results demonstrated that the life consumption of turbine rotor due to low cycle fatigue in the long-term operation of startup, running and shutdown should be determined from the full-time coverage of the load of turbine rotor.

An investigation into the kinetics of low-cycle fatigue strength of steel in hydrogen and vacuum

1974 ◽  
Vol 8 (3) ◽  
pp. 326-331
Author(s):  
A. N. Romaniv ◽  
Yu. V. Zima ◽  
V. I. Tkachev ◽  
R. I. Kripyakevich
Keyword(s):  
Fatigue Strength ◽  
Low Cycle Fatigue ◽  
Cycle Fatigue ◽  
Kinetics Of

Consideration of the cross sectional form of pipe bends when calculating their low-cycle fatigue strength

1973 ◽  
Vol 5 (10) ◽  
pp. 1287-1291 ◽  
Author(s):  
V. A. Nakhalov ◽  
R. Z. Shron ◽  
R. Kh. Baraz ◽  
R. K. Balashova
Keyword(s):  
Fatigue Strength ◽  
Low Cycle Fatigue ◽  
Cycle Fatigue ◽  
Cross Sectional ◽  
The Cross

A Study on the Temperature Calibration for a Small Electrical Resistance Furnace

2010 ◽  
Author(s):  
Un Bong Baek ◽  
Hae Moo Lee ◽  
Yun-Hee Lee ◽  
Seung Hoon Nahm
Keyword(s):  
Electrical Resistance ◽  
Power Plants ◽  
Low Cycle Fatigue ◽  
Small Scale ◽  
Temperature Calibration ◽  
Cycle Fatigue ◽  
Resistance Furnace ◽  
Small Space ◽  
Start Up ◽  
Electrical Resistance Furnace

A severe thermal stress occurs during start up/shutdown transients in thick walled components of high temperature power plants. Thus, a precise consideration of this issue is very important. Many researchers have studied low-cycle fatigue at high temperatures and small box-type electrical resistance furnaces have been developed for small-sized fatigue specimens. However, these small-scale electrical resistance furnaces need precise temperature calibrations because temperature control is difficult in a small space. Thus, a method for the temperature calibration of a box-type electrical resistance furnace is investigated and calibration procedures are proposed in this study.

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