Frequency and hold-time effects on low cycle fatigue life of notched specimens at elevated temperatureSakane, M., Ohnami, M., Awaya, T. and Shirafuji, N. J. Eng. Mater. Technol. (Trans. ASME) Jan. 1989 111, (1), 54–60

1989 ◽  
Vol 11 (4) ◽  
pp. 287-287
Keyword(s):  
Fatigue Life ◽  
Low Cycle Fatigue ◽  
Hold Time ◽  
Cycle Fatigue ◽  
Time Effects ◽  
Notched Specimens ◽  
Trans Asme

Frequency and Hold-Time Effects on Low Cycle Fatigue Life of Notched Specimens at Elevated Temperature

1989 ◽  
Vol 111 (1) ◽  
pp. 54-60 ◽  
Author(s):  
Masao Sakane ◽  
Masateru Ohnami ◽  
Teruyoshi Awaya ◽  
Nakao Shirafuji
Keyword(s):  
Fatigue Life ◽  
Low Cycle Fatigue ◽  
Hold Time ◽  
Strain Range ◽  
Fem Analysis ◽  
Time Dependent ◽  
Cycle Fatigue ◽  
Time Effects ◽  
Notched Specimens ◽  
Cycle Dependent

This paper describes the frequency and hold-time effects on high temperature low cycle fatigue for round notched specimens. Unnotched and notched specimens having different elastic stress concentration factors were fatigued under triangular and trapezoidal stress waves at frequencies ranging from 5 Hz to 0.0001 Hz at 873 K. The three specific fracture characteristics were observed: cycle dependent, time dependent, and cycle-time dependent. The respective notch sensitivity occurred in the respective fracture regime. The fatigue life of notched specimens was predicted from the elastic-plastic-creep cyclic FEM analysis using the linear damage rule and the strain range partitioning rule. Both the life prediction methods predicted the creep-fatigue life within almost a factor of two scatter band.

A Study on the Notch Effect on the Low Cycle Fatigue of Metals in Creep-Fatigue Interacting Conditions at Elevated Temperature

1983 ◽  
Vol 105 (2) ◽  
pp. 75-80 ◽  
Author(s):  
M. Sakane ◽  
M. Ohnami
Keyword(s):  
Elastic Stress ◽  
Low Cycle Fatigue ◽  
Hold Time ◽  
Cycle Fatigue ◽  
Time Effects ◽  
Notched Specimen ◽  
Notched Specimens ◽  
Creep Fatigue ◽  
Neuber's Rule ◽  
Modified Equation

Frequency and hold-time effects on fatigue lives of cylindrical notched specimens of SUS 316 stainless steel were studied at 600° C in air. From the tests, the following conclusions were obtained: Neuber’s rule, as used in the ASME N-47 Code, predicts very conservatively the life of notched specimens in tests without a hold-time. But it gives a nonconservative estimate for the reduction in the life of the material by the introduction of a hold-time. An empirical formula of a “frequency-elastic stress concentration factor modified equation” was obtained by analysing the experimental data. It predicts accurately the life of the notched specimen tested at different frequencies.

The Effect of Strain Rate on Low Cycle Fatigue Life with Hold Time for USC Candidate Rotor Material

2010 ◽  
pp. 217-229
Author(s):  
Kuk-cheol Kim ◽  
Byeong-ook Kong ◽  
Min-soo Kim ◽  
Sung-tae Kang
Keyword(s):  
Fatigue Life ◽  
Strain Rate ◽  
Low Cycle Fatigue ◽  
Hold Time ◽  
Cycle Fatigue

Hold time effects on low cycle fatigue behavior of HAYNES 230® superalloy at high temperatures

2005 ◽  
Vol 409 (1-2) ◽  
pp. 282-291 ◽  
Author(s):  
Y.L. Lu ◽  
L.J. Chen ◽  
G.Y. Wang ◽  
M.L. Benson ◽  
P.K. Liaw ◽  
...  
Keyword(s):  
High Temperatures ◽  
Low Cycle Fatigue ◽  
Fatigue Behavior ◽  
Hold Time ◽  
Cycle Fatigue ◽  
Time Effects ◽  
Haynes 230

scholarly journals Effect of Hold Time on Low Cycle Fatigue Life of Micro Solder Joint

2008 ◽  
Vol 49 (7) ◽  
pp. 1524-1530 ◽  
Author(s):  
Yoshihiko Kanda ◽  
Yoshiharu Kariya ◽  
Yusuke Mochizuki
Keyword(s):  
Fatigue Life ◽  
Solder Joint ◽  
Low Cycle Fatigue ◽  
Hold Time ◽  
Cycle Fatigue

Investigation on Low Cycle Fatigue Life of SC Notched Specimens

2010 ◽  
Vol 97-101 ◽  
pp. 449-452
Author(s):  
Ping Zhao ◽  
Qing Hua He ◽  
Wei Li
Keyword(s):  
Fatigue Life ◽  
Stress Ratio ◽  
Low Cycle Fatigue ◽  
Strain Range ◽  
Mean Stress ◽  
Cycle Fatigue ◽  
Total Strain Range ◽  
Notched Specimens ◽  
Orientation Function ◽  
Fatigue Notch Factor

A low cycle fatigue life (LCF) prediction model for nickel-based single crystal (SC) is presented based on the LCF experiments of notched specimens. Fatigue notch factor is adopted to reflect the influence of notch shape on LCF. Orientation function is adopted to modify total strain range and eliminate the influence of orientation on LCF. Cycle stress ratio is adopted to reflect the influence of mean stress and cycle character on LCF. The predicted results shows that all the data are in the factor of 2.1 scatter band, which means that the model proposed in this work is reasonable.

Influence of Hold-Time and Temperature on the Low-Cycle Fatigue of Incoloy 800

1972 ◽  
Vol 94 (3) ◽  
pp. 930-934 ◽  
Author(s):  
C. E. Jaske ◽  
H. Mindlin ◽  
J. S. Perrin
Keyword(s):  
Fatigue Life ◽  
Low Cycle Fatigue ◽  
Fatigue Behavior ◽  
Compressive Strain ◽  
Hold Time ◽  
Strain Range ◽  
Cyclic Fatigue ◽  
Cycle Fatigue ◽  
Incoloy 800 ◽  
Strain Cycling

A study has been conducted to determine the low-cycle fatigue behavior of solution-annealed Incoloy 800 bar at temperatures from 800–1400 deg F. The experimental work included evaluation of specimens under both continuous, completely reversed strain cycling and under strain cycling with hold time periods at the strain limits. At 1000, 1200, and 1400 deg F, it was found that 10-min hold-times at the tensile strain limit during every cycle significantly reduced the cyclic fatigue life compared to continuous cycling. However, there was little reduction in cyclic fatigue life when 10-min hold-times were introduced at the compressive strain limits or at both the tensile and compressive limits. The ratio of hold-time cyclic fatigue life to no-hold-time cyclic fatigue life decreased as the length of hold time increased (at constant total strain range) and as the magnitude of strain range decreased (at constant hold-time length).

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