Study on the Creep-Fatigue Interaction Behavior of 1Cr11Ni2W2MoV Steel

2021 ◽  
Vol 50 (2) ◽  
pp. 20210191
Author(s):  
Lanzhou Liu ◽  
Yifei Gao ◽  
Tong Niu ◽  
Zhiwei Zhang ◽  
Yanjiang Wang ◽  
...  
Keyword(s):  
Interaction Behavior ◽  
Creep Fatigue

Continuum damage mechanics-based analysis of creep–fatigue interaction behavior in a turbine rotor

2018 ◽  
Vol 28 (3) ◽  
pp. 455-477 ◽  
Author(s):  
WZ Wang ◽  
YZ Liu
Keyword(s):  
Damage Mechanics ◽  
Maximum Stress ◽  
Continuum Damage Mechanics ◽  
Turbine Rotor ◽  
Von Mises Stress ◽  
Temperature Phase ◽  
Continuum Damage ◽  
Interaction Behavior ◽  
Creep Fatigue ◽  
The Impact

The aim of this study is to analyze the creep–fatigue interaction behavior of a steam turbine rotor under idealized cyclic thermomechanical loading conditions. A Chaboche model-based material constitutive model is applied to simulate the multiaxial stress–strain behavior in the rotor. Influence of accumulated damage during the whole iterations on the creep–fatigue interaction behavior is described by continuum damage mechanics. Analysis of the temperature and stress variations during the startup phase reveals that the startup phase can be divided into a condensation phase, a high steam flux phase, and an elevated temperature phase and that thermal stress reaches its maximum value in the condensation phase. In addition, creep–fatigue interaction in the rotor leads to a gradual decrease in the maximum stress; furthermore, comparison of the von Mises stress displays that the impact of damage accumulation results in the shift of the location with the maximum stress. Investigation of creep–fatigue damage discloses that the total damage is concentrated on the steam inlet notch zone and the blade groove of the first and third stages.

Low cycle fatigue, creep and creep-fatigue interaction behavior of a TiAl alloy at high temperatures

2018 ◽  
Vol 144 ◽  
pp. 60-63 ◽  
Author(s):  
Chengli Dong ◽  
Huichen Yu ◽  
Zehui Jiao ◽  
Fantao Kong ◽  
Yuyong Chen
Keyword(s):  
High Temperatures ◽  
Tial Alloy ◽  
Low Cycle Fatigue ◽  
Cycle Fatigue ◽  
Interaction Behavior ◽  
Creep Fatigue

Creep–fatigue interaction behavior of 316LN austenitic stainless steel with varying nitrogen content

2015 ◽  
Vol 88 ◽  
pp. 972-982 ◽  
Author(s):  
G.V. Prasad Reddy ◽  
R. Sandhya ◽  
S. Sankaran ◽  
P. Parameswaran ◽  
K. Laha
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Nitrogen Content ◽  
Interaction Behavior ◽  
Creep Fatigue

Effect of W and Ta on creep–fatigue interaction behavior of reduced activation ferritic–martensitic (RAFM) steels

2015 ◽  
Vol 100 ◽  
pp. 314-320 ◽  
Author(s):  
Vani Shankar ◽  
K. Mariappan ◽  
R. Sandhya ◽  
K. Laha ◽  
T. Jayakumar ◽  
...  
Keyword(s):  
Interaction Behavior ◽  
Creep Fatigue
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