scholarly journals Creep-Fatigue Life Evaluation of Mod.9Cr-1Mo Steel Round Notch Bar Specimens

2021 ◽  
Vol 70 (8) ◽  
pp. 634-640
Author(s):  
Tomohiro UEYAMA ◽  
Takashi OGATA
Keyword(s):  
Fatigue Life ◽  
Life Evaluation ◽  
Creep Fatigue ◽  
Fatigue Life Evaluation

Application of Ultrasonic Test on Creep-Fatigue Life Evaluation

2006 ◽  
pp. 476-479
Author(s):  
Bum Joon Kim ◽  
Byeong Soo Lim ◽  
Sung Jin Song ◽  
Young H. Kim
Keyword(s):  
Fatigue Life ◽  
Ultrasonic Test ◽  
Life Evaluation ◽  
Creep Fatigue ◽  
Fatigue Life Evaluation

Dynamic surrogate modeling approach for probabilistic creep-fatigue life evaluation of turbine disks

2019 ◽  
Vol 95 ◽  
pp. 105439 ◽  
Author(s):  
Lu-Kai Song ◽  
Guang-Chen Bai ◽  
Cheng-Wei Fei
Keyword(s):  
Fatigue Life ◽  
Surrogate Modeling ◽  
Modeling Approach ◽  
Life Evaluation ◽  
Creep Fatigue ◽  
Turbine Disks ◽  
Fatigue Life Evaluation

Creep-Fatigue Life Evaluation of Lead-Free Solders Using Miniature Specimen

2018 ◽  
Vol 2018 (0) ◽  
pp. OS0907
Author(s):  
Mineo NOZAKI ◽  
Fumio OGAWA ◽  
Takamoto ITOH ◽  
Noritake HIYOSHI
Keyword(s):  
Fatigue Life ◽  
Lead Free ◽  
Miniature Specimen ◽  
Life Evaluation ◽  
Creep Fatigue ◽  
Fatigue Life Evaluation ◽  
Lead Free Solders

scholarly journals Creep-fatigue life evaluation of circular notch specimen on a CrMoV forging steel under multiaxial stress gradient condition

2018 ◽  
Vol 84 (867) ◽  
pp. 18-00236-18-00236
Author(s):  
Takashi OGATA ◽  
Saki IKEDA ◽  
Satoru KOMATSUZAKI
Keyword(s):  
Fatigue Life ◽  
Stress Gradient ◽  
Multiaxial Stress ◽  
Life Evaluation ◽  
Creep Fatigue ◽  
Fatigue Life Evaluation ◽  
Gradient Condition ◽  
Circular Notch

scholarly journals Creep-fatigue life evaluation of high chromium ferritic steel under non-proportional loading

2016 ◽  
Vol 10 (38) ◽  
pp. 281-288 ◽  
Author(s):  
T. Morishita ◽  
Y. Murakami ◽  
T. Itoh ◽  
H. Tanigawa
Keyword(s):  
Fatigue Life ◽  
Ferritic Steel ◽  
Proportional Loading ◽  
High Chromium ◽  
Life Evaluation ◽  
Creep Fatigue ◽  
Fatigue Life Evaluation

Multiaxial Creep-Fatigue Life Evaluation under Proportional Loading

2003 ◽  
Vol 2003 (0) ◽  
pp. 421-422 ◽  
Author(s):  
Yasutaka NOGUCHI ◽  
Mitsuo MIYAHARA
Keyword(s):  
Fatigue Life ◽  
Proportional Loading ◽  
Life Evaluation ◽  
Creep Fatigue ◽  
Fatigue Life Evaluation ◽  
Multiaxial Creep

Comparison of Creep-Fatigue Evaluation Methods With Notched Specimens Made of Mod.9Cr-1Mo Steel

2011 ◽  
Author(s):  
Masanori Ando ◽  
Yuichi Hirose ◽  
Takanori Karato ◽  
Sota Watanabe ◽  
Osamu Inoue ◽  
...  
Keyword(s):  
Fatigue Life ◽  
Fast Reactor ◽  
Evaluation Methods ◽  
Fatigue Tests ◽  
Test Results ◽  
Notched Specimens ◽  
Life Evaluation ◽  
Creep Fatigue ◽  
Fatigue Life Evaluation

In a component design at elevated temperature, creep-fatigue is one of the most important failure modes, and assessment of creep-fatigue life in structural discontinuity is important issue to evaluate structural integrity of the components. Therefore a lot of creep-fatigue life evaluation methods were proposed until now. To compare and assess these evaluation methods, a series of creep-fatigue tests was carried out with notched specimens. All the specimens were made of Mod.9Cr-1Mo steel, which it is a candidate material for a primary and secondary heat transport system components of JSFR (Japan Sodium-cooled Fast Reactor). Mechanical creep-fatigue tests and thermal creep-fatigue tests were performed by using conventional uni-axial push-pull fatigue test machine and thermal gradient generating system with an induction heating coil. Stress concentration levels were adjusted by varying the diameters of notch roots in the both tests. In the test, creep-fatigue lives, crack initiation and propagation processes were observed by digital micro-scope and replica method. Besides those, a series of elastic Finite Element Analysis (FEA) were carried out to predict the number of cycles to failure by several creep-fatigue life evaluation methods. Then these predictions were compared with test results. Several types of evaluation methods which are stress redistribution locus (SRL) method, simple elastic follow-up method and the methods described in JSME FR (Fast Reactor) code were applied. The applicability and conservativeness of these methods were discussed. It was appeared that SRL method gave rational prediction of creep-fatigue life with conservativeness when the factor of κ = 1.6 was applied for all the conditions tested in this study. Comparison of SRL method and simple elastic follow-up method indicated that SRL method applied factor of κ = 1.6 gave the smallest creep-fatigue life in practicable stress level. JSME FR code gave an evaluation 70∼100 times conservative lives comparing with the test results.

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