High temperature LCF life prediction of notched DS Ni-based superalloy using critical distance concept
Source abstract
Abstract
Abstract This study investigated the method of estimating the LCF strength of notched DS superalloy specimen using the critical distance concept. Fatigue tests of four types of single-edge notch machined with DS superalloy DZ125 were conducted at 850 °C with load ratio R = 0.1. Smooth bar specimen fatigue tests were also carried out. It was found that a close correlation exists between the product of critical distance and linear-elastic stress concentration factor Kt and the fracture life N f of notched specimens. Predictions based upon the reformulated critical distance in combination with SWT parameters gave estimates falling within a scatter factor of about two.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Fatigue and fracture mechanics · High Temperature Alloys and Creep · Metallurgy and Material Forming
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (22)
Show source-provided references
1. Neuber · 1958
2. Peterson RE. Notch sensitivity. In: Sines G, Waisman JL, editors. Metal fatigue. New York: McGraw Hill; 1959. p. 293–306.
3. Engineering formulae for fatigue strength reduction due to crack-like notches10.1007/BF00942722 ↗
4. A stress-based method to predict lifetime under multiaxial fatigue loadings10.1046/j.1460-2695.2003.00723.x ↗
5. Fatigue crack initiation and propagation phases near notches in metals with low notch sensitivity10.1016/S0142-1123(97)00091-1 ↗
6. Geometrical effects in fatigue: a unifying theoretical model10.1016/S0142-1123(99)00007-9 ↗
7. A unifying approach to estimate the high-cycle fatigue strength of notched components subjected to both uniaxial and multiaxial cyclic loadings10.1111/j.1460-2695.2004.00759.x ↗
8. Fatigue design in the presence of stress concentrations10.1243/03093240360713496 ↗
9. A mechanistic approach to critical distance methods in notch fatigue10.1046/j.1460-2695.2001.00401.x ↗
10. Some new methods for predicting fatigue in welded joints10.1016/S0142-1123(01)00174-8 ↗
11. Prediction of fatigue failure location on a component using a critical distance method10.1016/S0142-1123(00)00062-1 ↗
12. The validation of some methods of notch fatigue analysis10.1046/j.1460-2695.2000.00302.x ↗
13. The theory of critical distances10.1016/j.engfracmech.2007.04.007 ↗
14. The theory of critical distances: a review of its applications in fatigue10.1016/j.engfracmech.2006.12.004 ↗
15. Susmel · 2009
16. Taylor · 2007
17. On the use of critical distance theories for the prediction of the high cycle fatigue limit stress in notched Ti-6Al-4V10.1016/j.ijfatigue.2004.06.002 ↗
18. A novel formulation of the theory of critical distances to estimate lifetime of notched components in the medium-cycle fatigue regime10.1111/j.1460-2695.2007.01122.x ↗
19. Susmel L, Taylor D. On the use of the theory of critical distances to estimate fatigue strength of notched components in the medium-cycle fatigue regime. In: Proceedings of FATIGUE 2006 Atlanta, USA; 2006.
20. Fatigue life prediction of small notched Ti-6Al-4V specimens using critical distance10.1016/j.engfracmech.2010.04.001 ↗
21. An elasto-plastic reformulation of the theory of critical distances to estimate lifetime of notched components failing in the low/medium-cycle fatigue regime
22. China Aeronautic Material Handbook (Internal Publication). Beijing (China): Institute of Aeronautical Materials; 2004.