scholarly journals Modeling and Experimental Study of Long Term Creep Damage in Austenitic Stainless Steels

2014 ◽  
Vol 3 ◽  
pp. 122-128 ◽  
Author(s):  
Y. Cui ◽  
M. Sauzay ◽  
C. Caes ◽  
P. Bonnaillie ◽  
B. Arnal
Keyword(s):  
Experimental Study ◽  
Stainless Steels ◽  
Austenitic Stainless Steels ◽  
Creep Damage ◽  
Term Creep

Modeling and experimental study of long term creep damage in austenitic stainless steels

2015 ◽  
Vol 58 ◽  
pp. 452-464 ◽  
Author(s):  
Y. Cui ◽  
M. Sauzay ◽  
C. Caes ◽  
P. Bonnaillie ◽  
B. Arnal ◽  
...  
Keyword(s):  
Experimental Study ◽  
Stainless Steels ◽  
Austenitic Stainless Steels ◽  
Creep Damage ◽  
Term Creep

Modeling and Experimental Study of Long Term Creep Damage in Austenitic Stainless Steels

2013 ◽  
Vol 592-593 ◽  
pp. 83-86 ◽  
Author(s):  
Yi Ting Cui ◽  
Maxime Sauzay
Keyword(s):  
Grain Boundaries ◽  
Stainless Steels ◽  
Cavity Growth ◽  
High Stress ◽  
Austenitic Stainless Steels ◽  
Creep Damage ◽  
Future Generation ◽  
Creep Tests ◽  
Term Creep

Austenitic Stainless Steels (SSs) are presently being investigated as appropriate candidates for structural components for the future Generation IV nuclear reactors. Austenitic SSs of different grades will operate at high temperature and suffer low stress loading for decades. At the laboratory, austenitic SSs have been subjected to creep tests at various stresses and temperatures between 500°C to 700°C, up to nearly 50·103h. Interrupted creep tests show an acceleration of the reduction in cross-section only during the last 15% of creep lifetime which may be called macroscopic necking. The modeling of necking using a modified Norton power-law allows lifetime predictions in agreement with experimental data up to a few thousand hours only. And the experimental results show that, the extrapolation of the 'stress lifetime curves obtained at high stress leads to large overestimations of lifetimes at low stress. After FEGSEM observations, these overestimates are mainly due to additional intergranular cavitation along grain boundaries. The modeling of cavity growth by vacancy diffusion along grain boundaries coupled with continuous nucleation proposed by Riedel has been carried out. Lifetimes for long term creep are rather correctly predicted with respect to experimental lifetimes. The lifetime curves predicted by either the necking model or the creep cavity one cross each other, defining transition times of five to ten thousand hours for temperatures between 600°C and 700°C, in agreement with experimental curves.

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.

Contributions of Dr. Sumio Yukawa in the Development of Non-Ductile Failure Prevention Rules in the ASME Code

2008 ◽  
Author(s):  
Hardayal S. Mehta
Keyword(s):  
Elevated Temperature ◽  
Carbon Steel ◽  
Stainless Steels ◽  
Pressure Vessel ◽  
Nickel Alloys ◽  
Ductile Failure ◽  
Austenitic Stainless Steels ◽  
Current Status ◽  
Asme Code

The objective of this paper is to review and highlight the contributions of Dr. Sumio Yukawa in the development of rules for the prevention of non-ductile failure in the ASME Boiler and Pressure Vessel Code. This includes review of his role in the development of WRC-175, Appendix G of Section III, the development of early flaw evaluation rules for carbon steel piping and in the review and evaluation of the toughness of austenitic stainless steels and nickel alloys after long-term elevated temperature exposures. The current status of these activities is briefly described.

Creep damage characteristics and evolution of HR3C austenitic steel during long term creep

2021 ◽  
pp. 142432
Author(s):  
Jie Zhang ◽  
Zhengfei Hu ◽  
Guoli Zhai ◽  
Zhen Zhang ◽  
Ziyi Gao
Keyword(s):  
Austenitic Steel ◽  
Creep Damage ◽  
Damage Characteristics ◽  
Term Creep
Sign in / Sign up

Export Citation Format

Share Document