Out-of-phase thermo-mechanical fatigue crack growth and the effect of the compressive minimum load level on crack closure at notches

Almroth, Per; Gustafsson, David; Homs, J. Loureiro; Simonsson, Kjell

doi:10.1016/j.ijfatigue.2020.105906

Cited by 13 publications

(4 citation statements)

References 31 publications

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“…Therefore, in the diagram of Figure 12, the results of IF and IP tests are similar, while the crack growth rate of OP test is significantly lower than theirs. In several previous reference about TMF crack growth tests, it is proposed that the OP mode has a higher crack growth rate due to a lower crack closure effect, which is opposite to the result in this work 39,40 …”

Section: Resultscontrasting

confidence: 64%

“…In several previous reference about TMF crack growth tests, it is proposed that the OP mode has a higher crack growth rate due to a lower crack closure effect, which is opposite to the result in this work. 39,40 For the case of load control, the test process proposed in this study can well complete the TMF test with different phase angles. The crack length is effectively calculated through the modified compliance method, and the relationship between the crack growth rate and the SIF can be quantitatively analyzed and discussed.…”

Section: High-temperature Fatigue Crack Growth Test Proceduresmentioning

confidence: 99%

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Thermomechanical and isothermal fatigue crack propagation testing method for 316LN austenitic stainless steel

Zheng

Zhao

et al. 2022

Fatigue Fract Eng Mat Struct

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Investigating fatigue crack growth behavior of materials is crucial to the life design and safety evaluation of engineering structures. During the practical service condition, the temperature keeps changing, which cannot be studied by the traditional fatigue crack growth test method at constant temperature. In this study, we focus on constructing a new thermomechanical fatigue (TMF) crack propagation testing method, developing a thermal deformation compensation method, and proposing an equivalent compliance method suitable for variable temperature conditions based on ASTM E647 standard to measure the crack length. Furthermore, the load-and strain-controlled TMF tests under different phase angles are carried out to prove the validity of the new method.

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Section: Resultscontrasting

confidence: 64%

Section: High-temperature Fatigue Crack Growth Test Proceduresmentioning

confidence: 99%

Thermomechanical and isothermal fatigue crack propagation testing method for 316LN austenitic stainless steel

Zheng

Zhao

et al. 2022

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

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“…It has been shown by many authors that experiments under negative load ratios show higher crack growth rates than predicted [11]. This may be attributed to the fact that a crack may be open even under negative loading, and in some instances, even throughout its entire cycle.…”

Section: Fatigue Crack Propagation 3 31 Fatigue Crack Propagationmentioning

confidence: 90%

Modelling of TMF Crack Growth in Polycrystalline Gas Turbine Alloys : Accounting for Crack Closure Effects

Loureiro-Homs

2020

Linköping Studies in Science and Technology. Licentiate Thesis

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The work presented in this Licentiate of Engineering thesis has been carried out at Linköping University. This research has been funded by the Swedish Energy Agency and Siemens Energy through "Turbines for Future Energy Systems" (Turbiner för framtidens energisystem), Grant No.44100-1, the support of which is gratefully acknowledged. A big thanks to all the team members from Linköping University and Siemens, whose support has been invaluable. To my office mate, Thomas Lindstöm, I am sure your dream car is right around the corner: the mighty Niva Lada will be yours. Eventually.

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“…Compared with the crack growth test under isothermal temperature conditions, the TMFCG test obviously has higher difficulties, such as how to accurately measure the crack length under variable temperature conditions, which leads to a relatively limited number of related studies 22 . The current TMFCG studies mainly focus on nickel‐based alloy materials of aero engine components, 23 and mainly discuss the change of crack growth rate of materials under different phase relations and load holding time, 24–26 while the related studies on the TMFCG behavior of austenitic SS materials are seldom reported. Palmert 27 conducted TMFCG tests on single‐crystal nickel‐based alloys.…”

Section: Introductionmentioning

confidence: 99%

Isothermal and thermomechanical fatigue crack growth behavior of 316LN stainless steel under load‐ and strain‐controlled modes

Zheng,

Li,

Chen

2024

Fatigue Fract Eng Mat Struct

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Crack growth tests of 316LN stainless steel under load‐controlled and strain‐controlled thermo‐mechanical fatigue (TMF) loadings at the temperature range of 350°C ~ 550°C were conducted. Moreover, the isothermal fatigue (IF) crack growth tests at the maximum temperature of 550°C were performed for comparison. The differences in IF and TMF crack propagation behavior under different loading conditions were thoroughly discussed, and the underlying mechanisms were revealed by a comprehensive characterization of the deformation state of the crack tip region using digital image correlation (DIC) and electron backscatter diffraction (EBSD) methods. Furthermore, it was found that the EBSD characterization was simply based on a single plane made it difficult to evaluate the complex crack growth behavior. In addition, the limitations of the classical parameter of stress intensity factor under TMF loading were presented.

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Out-of-phase thermo-mechanical fatigue crack growth and the effect of the compressive minimum load level on crack closure at notches

Cited by 13 publications

References 31 publications

Thermomechanical and isothermal fatigue crack propagation testing method for 316LN austenitic stainless steel

Thermomechanical and isothermal fatigue crack propagation testing method for 316LN austenitic stainless steel

Modelling of TMF Crack Growth in Polycrystalline Gas Turbine Alloys : Accounting for Crack Closure Effects

Isothermal and thermomechanical fatigue crack growth behavior of 316LN stainless steel under load‐ and strain‐controlled modes

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