Characterization of fatigue crack growth, damage mechanisms and damage evolution of the nickel-based superalloys MAR-M247 CC (HIP) and CM-247 LC under thermomechanical fatigue loading using in situ optical microscopy
Source abstract
Abstract
Abstract In this paper, the influence of different phase angles, load ratios and dwell times on the thermomechanical fatigue (TMF) crack growth of the nickel-based superalloys MAR-M247 CC (HIP) and CM-247 LC is studied. The thermomechanical fatigue crack growth tests are performed under in-phase (IP) and out-of-phase (OP) TMF loading between 300 ° C and 950 ° C . It is shown, that the applied load ratio plays a crucial role for the resulting fatigue crack growth rates and whether IP or OP TMF loading is more detrimental. A digital optical microscope is installed, which allows in situ observation of the fatigue crack growth, the active damage mechanisms and the damage evolution even at high temperatures. The in situ observations are accompanied by fractographic investigations, which confirm, that IP TMF loading preferentially leads to interdentritic fracture. Finally, first steps towards a quantification of the active damage mechanisms are taken using digital image processing.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: High Temperature Alloys and Creep · Fatigue and fracture mechanics · Aluminum Alloy Microstructure Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (16)
Show source-provided references
1. Serrano L, Müller F, Scholz A, Berger C, Oechsner M, Schweizer C, et al. Rissverhalten unter anisothermen Beanspruchungsbedingungen – Berechnungsverfahren für Nickelbasislegierungen. Tech. rep., Institut für Werkstoffkunde TU Darmstadt, Fraunhofer-Institut für Werkstoffmechanik IWM Freiburg, Abschlussbericht zum AiF-Forschungsvorhaben Nr. 15525N, FVV-Nr. 959; 2011.
2. Lifetime, cyclic deformation and damage behaviour of MAR-M247 LC under thermo-mechanical fatigue loading with 0°, 180°, −90° and +90° phase shift between strain and temperature10.1016/j.proeng.2014.06.260 ↗
3. Thermomechanical fatigue of MAR-M247: Part 1 – Experiments10.1115/1.2903189 ↗
4. An empirical approach to correlating thermo-mechanical fatigue behaviour of a polycrystalline Ni-base superalloy10.3390/ma6115275 ↗
5. A review of thermo-mechanical fatigue behaviour in polycrystalline nickel superalloys for turbine disc applications10.3184/096034013X13630238172260 ↗
6. Influence of phase angle on lifetime, cyclic deformation and damage behavior of mar-m247 {LC} under thermo-mechanical fatigue10.1016/j.msea.2015.06.055 ↗
7. Crack growth of a polycrystalline nickel alloy under tmf loading
8. Moverare JJ, Kontis P, Johansson S, Reed RC. Thermomechanical fatigue crack growth in a cast polycrystalline superalloy. In: MATEC web of conferences, vol. 14; 2014. p. 19004.10.1051/matecconf/20141419004 ↗
9. Influences on the thermomechanical fatigue crack growth of the nickel alloy 61710.3139/120.110684 ↗
10. Assessment of fatigue crack closure under in-phase and out-of-phase thermomechanical fatigue loading using a temperature dependent strip yield model10.1016/j.ijfatigue.2015.03.022 ↗
11. A crack opening stress equation for in-phase and out-of-phase thermomechanical fatigue loading10.1016/j.ijfatigue.2016.03.011 ↗
12. Thermal-mechanical and isothermal fatigue of IN 792 CC10.1016/S0921-5093(97)00281-5 ↗
13. Lifetime, cyclic deformation and damage behaviour of MAR-M-247 CC under in-phase, out-of-phase and phase-shift tmf-loadings
14. Thermo-mechanical fatigue tests on MarM-247 nickel-based superalloy using the direct resistance method10.1179/096034013X13631630183856 ↗
15. Effects of microstructure on high temperature dwell fatigue crack growth in a coarse grain {PM} nickel based superalloy10.1016/j.actamat.2015.02.023 ↗
16. Influence of high-temperature dwell time on creep-fatigue behavior in a 1000 {MW} steam turbine rotor10.1016/j.engfracmech.2016.08.018 ↗