Determination of Creep Crack Growth Threshold by Experiments under Elevated Temperature with Pre-Stressed Specimens

Hao Liu; Rui Bao; Bin Jun Fei

doi:10.4028/www.scientific.net/AMR.891-892.371

Paper Titles

Comparison of SGBEM-FEM Alternating Method and XFEM Method for Determining Stress Intensity Factor for 2D Crack Problems
p.345

Influence of Crack Retardation on Fatigue Crack Propagation in Steels for Railway Axles
p.351

Investigations on the Fatigue Crack Propagation Threshold in Very High Cycle Fatigue
p.357

J-Integral Approach to Creep-Fatigue Crack Propagation in Lead-Free Solder under Various Loading Waveforms
p.365

Determination of Creep Crack Growth Threshold by Experiments under Elevated Temperature with Pre-Stressed Specimens
p.371

Low Cycle Fatigue Behavior and Mechanism of Newly Developed Advanced Heat Resistant Austenitic Stainless Steels at High Temperature
p.377

Low Cycle Fatigue and Creep-Fatigue Interaction Behaviour of Reduced Activation Ferritic Martensitic (RAFM) Steels with Varying W and Ta Contents
p.383

Cyclic Deformation of Rare-Earth Containing Magnesium Alloys
p.391

Fatigue Behaviour of AZ91 Magnesium Alloy in as-Cast and Severe Plastic Deformed Conditions
p.397

HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 891-892Determination of Creep Crack Growth Threshold by...

Determination of Creep Crack Growth Threshold by Experiments under Elevated Temperature with Pre-Stressed Specimens

Abstract:

A novel test method is presented in this paper for determination of the creep crack growth threshold. In this method, a wedge is placed in the notch of a standard compact tension (CT) specimen with a pre-crack, which provides an evaluable stress fields characterized with stress intensity factor (K) at the crack tip. Then the specimen is kept in the test temperature for a certain time. The creep crack growth threshold of the material at a given temperature can be obtained by extrapolating the curves of the crack growth rate vs. K in the double logarithmic coordinates. Since it does not need mechanical testing machine and several specimens can be tested simultaneously, the proposed method is economical in both costs and time. Tests on a nickel-based powder metallurgy superalloy FGH97 are conducted using this method at 600°C, 650°C and 750°C, which indicate its feasibility.

You might also be interested in these eBooks

View Preview

Info:

Periodical:

Advanced Materials Research (Volumes 891-892)

Pages:

371-376

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.891-892.371

Citation:

Cite this paper

Online since:

March 2014

Authors:

Hao Liu, Rui Bao*, Bin Jun Fei

Keywords:

Creep Crack Growth, Creep Crack Growth Threshold, Elevated Temperature, Pre-Stressed Specimen

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

* - Corresponding Author

References

[1] Y. Chen: Influence of inclusion on the stress intensity factors under thermo-mechanical loads in a PM superalloy [J]. Appl Math Model, 33 (2009): 386-397.

DOI: 10.1016/j.apm.2007.11.008

Google Scholar

[2] T. Swift. Damage tolerance capability [J]. Fatigue, 16(1994): 75–94.

Google Scholar

[3] Engine Structural Integrity Program, MIL-HDBK-1783B, (2002).

Google Scholar

[4] J. Sun, Y.H. Zhang, Y.X. Hu. Creep crack propagation in conventional cast and direction alloy solidified superalloy Rene80 [J]. Acta Metall Sin, 29(1993): p. A183-186. [in Chinese].

Google Scholar

[5] M.R. Joyce, C.M. Styles, P.A.S. Reed. Elevated temperature short crack fatigue behaviour in near eutectic Al–Si alloys [J]. Int J Fatigue, 25 (2003): 863–869.

DOI: 10.1016/s0142-1123(03)00157-9

Google Scholar

[6] ASTM Standard test method for measurement of creep crack growth rates in metals (E 1457-00). Annual book of ASTM standards 2001; 3(1): 936–50.

Google Scholar

[7] M.E. Kassnera, T.A. Hayesb. Creep cavitation in metals [J]. Int J Plasticity, 19 (2003): 1715–1748.

Google Scholar

[8] M.J. Siverns, A.T. Price. Crack growth under creep conditions in a quenched 2-1/4Cr 1 Mo Steel [J]. Int J Fracture, 9(1973): 199-207.

Google Scholar

[9] K. Sadanada, P. Shahinian. Creep crack growth of alloy 719. Metall Mater Trans A, 8(1977): pp.439-449.

Google Scholar

[10] H.Q. Yang, R. Bao, J.Y. Zhang, et al. Creep–fatigue crack growth behaviour of a nickel-based powder metallurgy superalloy under elevated temperature [J]. Eng Fail Anal, 18(2011), pp.1058-1066.

DOI: 10.1016/j.engfailanal.2010.12.025

Google Scholar

[11] H.Q. Yang, R. Bao, J.Y. Zhang, et al. Crack growth behaviour of a nickel-based powder metallurgy superalloy under elevated temperature [J]. Int J Fatigue, 33(2011): pp.632-641.

DOI: 10.1016/j.ijfatigue.2010.11.003

Google Scholar