New approach to predict the long-term creep behaviour and evolution of precipitate back-stress of 9–12% chromium steels

2010 ◽  
Vol 63 (2-3) ◽  
pp. 137-143 ◽  
Author(s):  
I. Holzer ◽  
E. Kozeschnik ◽  
H. Cerjak
Keyword(s):  
Creep Behaviour ◽  
Back Stress ◽  
New Approach ◽  
Chromium Steels ◽  
Term Creep

Statistical reinterpretation of the long term creep behaviour of the Ismetpasa segment of North Anatolian Fault, Turkey

2021 ◽  
pp. 228947
Author(s):  
Gokhan Gurbuz ◽  
Caglar Bayik ◽  
Saygin Abdikan ◽  
Kurtulus Sedar Gormus ◽  
Senol Hakan Kutoglu
Keyword(s):  
Creep Behaviour ◽  
North Anatolian Fault ◽  
Term Creep

Prediction of long-term creep behaviour of Grade 91 steel at 873 K in the framework of microstructure-based creep damage mechanics approach

2018 ◽  
Vol 28 (6) ◽  
pp. 877-895 ◽  
Author(s):  
J Christopher ◽  
BK Choudhary
Keyword(s):  
Damage Mechanics ◽  
Creep Behaviour ◽  
Creep Damage ◽  
Time Data ◽  
Grade 91 ◽  
Term Creep ◽  
Kinetic Creep ◽  
Grade 91 Steel

A detailed analysis has been performed for the prediction of long-term creep behaviour of tempered martensitic Grade 91 steel at 873 K using the microstructure-based creep damage mechanics approach. Necessary modifications have been made into the original kinetic creep law proposed by Dyson and McLean in order to account for the influence of microstructural damages arising from the coarsening of M23C6 and conversion of useful MX precipitates into deleterious Z-phase on creep behaviour of the steel. An exponential rate relationship has been introduced for the evolution of number density of MX precipitates with time. It has been shown that the developed model adequately predicts the experimental long-term creep strain–time as well as creep rate-time data. The role of Z-phase on long-term creep behaviour of Grade 91 steel has also been discussed.

Long Term Creep Life Prediction of New and Service Exposed P91 Steel

2018 ◽  
Author(s):  
Muneeb Ejaz ◽  
Norhaida Ab Razak ◽  
Andrew Morris ◽  
Scott Lockyer ◽  
Catrin M. Davies
Keyword(s):  
Tensile Strength ◽  
Creep Behaviour ◽  
Equivalent Stress ◽  
Practical Reasons ◽  
Creep Data ◽  
Short Term ◽  
Creep Tests ◽  
High Temperature Components ◽  
Term Creep

P91 steels are widely used in high temperature components for power generation. Creep data is often generated through accelerated short term creep tests, for practical reasons, via increasing stress or temperature though this may alter the creep behaviour. Through normalising the creep test stress by tensile strength the Wilshire models reduce the batch to batch scatter in the creep data and enable the prediction of long term creep data from relatively short term test results. In this work it is shown that the Wilshire models fitted to uniaxial creep rupture data can be used to predict failure in both as cast and service exposed multiaxial tests. This is provided that the equivalent stress is the rupture controlling stress, as is the case for the P91 tests examined, and the tensile strength is measured as part of the test programme.

Long term creep behaviour of welded joints of P91 steel at 650°C

2013 ◽  
Vol 560 ◽  
pp. 678-684 ◽  
Author(s):  
M.E. Abd El-Azim ◽  
O.H. Ibrahim ◽  
O.E. El-Desoky
Keyword(s):  
Welded Joints ◽  
Creep Behaviour ◽  
P91 Steel ◽  
Term Creep

Nonlinear Viscoelastic Creep Characterization of HDPE-Rice Husk Composites

2005 ◽  
Vol 13 (6) ◽  
pp. 581-598 ◽  
Author(s):  
A. Pramanick ◽  
M. Sain
Keyword(s):  
Rice Husk ◽  
Creep Behaviour ◽  
Nonlinear Creep ◽  
Flexural Mode ◽  
Viscoelastic Creep ◽  
Nonlinear Viscoelastic ◽  
Bearing Materials ◽  
Term Creep

Rice husk based plastic composites are increasingly being used as deck-boards, railings and other load-bearing materials. Since this material typically contains 40% plastic, and plastics creep with respect to time when they carry load, creep is an important issue here. So the viscoelastic characterization of this material and the prediction of creep as a function time is of paramount importance for the material's long-term commercial success. Creep is a time related deformation but it can also be affected by the stress level and environmental conditions, such as time and temperature. In order to predict the creep of this composite, it is important to derive a relationship between deformation, time, temperature, relative humidity and stress. Nonlinearity can exist in the stress, temperature, and moisture related deformation. In this study, hollow extruded rice husk -HDPE beams were subjected to creep and recovery in flexural mode and the stress related nonlinear creep behaviour of the same was studied phenomenologically. Both linear and non-linear region constants were determined with modified models, and a predictive model was developed. These constants will be used to define, model and predict long-term creep deformation.

Long-term creep behaviour of cast TiAl-Ta alloy

2018 ◽  
Vol 95 ◽  
pp. 24-32 ◽  
Author(s):  
J. Lapin ◽  
T. Pelachová ◽  
M. Dománková
Keyword(s):  
Creep Behaviour ◽  
Term Creep
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