Cyclic stress-strain behaviour under thermomechanical fatigue conditions – Modeling by means of an enhanced multi-component model

Christ, Hans‐Jürgen; Bauer, V.

doi:10.1088/1742-6596/240/1/012038

Cited by 2 publications

(3 citation statements)

References 4 publications

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“…The vertical shift of the hysteresis loops indicates a hardening of the alloys during TMF and has also been reported in other studies. [40,41] At the same time, the vertical shift of the stress reached at the highest temperature (380 °C) observed throughout the TMF tests indicates a cyclic softening of the alloys at high temperatures.…”

Section: Thermomechanical Fatiguementioning

confidence: 94%

3D Investigation of Damage During Strain‐Controlled Thermomechanical Fatigue of Cast Al–Si Alloys

et al. 2023

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The strain‐controlled thermomechanical fatigue behavior is investigated for three cast near‐eutectic Al–Si alloys with different Ni, Cu, and Mg contents. Synchrotron tomography and neutron diffraction experiments are used to correlate 3D microstructural features with damage initiation and evolution. The results show that the alloy with lower Cu, Ni, and Mg concentrations has up to 45% higher thermomechanical fatigue resistance for cooling/heating rates of 5 and 15 K s−1. In addition, this alloy also exhibits damage formation at later stages during thermomechanical fatigue and slower damage accumulation compared to other alloys. This difference in behavior is a consequence of its higher ductility, which is a result of the lower volume fraction and global interconnectivity of the 3D hybrid networks formed by Si and intermetallics and the absence of large primary Si clusters which act as preferred crack initiation sites during the early stages of thermomechanical fatigue.

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Section: Thermomechanical Fatiguementioning

confidence: 94%

3D Investigation of Damage During Strain‐Controlled Thermomechanical Fatigue of Cast Al–Si Alloys

et al. 2023

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“…The most severe loading conditions are those where stress or strain and temperature vary simultaneously, that is, in the case of thermomechanical fatigue. Numbers of thermomechanical studies were devoted to superalloy single and polycrystals 5–13 and to austenitic, low alloyed ferritic and dual hardening steels 14–28 …”

Section: Introductionmentioning

confidence: 99%

“…Numbers of thermomechanical studies were devoted to superalloy single and polycrystals [5][6][7][8][9][10][11][12][13] and to austenitic, low alloyed ferritic and dual hardening steels. [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] From the newly developed austenitic steels, the highest interest was devoted to advanced austenitic stainless steels such as NF709, H3RC and Sanicro 25. Originally, the creep resistance was investigated.…”

Section: Introductionmentioning

confidence: 99%

The effect of dwell on thermomechanical fatigue in superaustenitic steel Sanicro 25

Petráš

Šulák

Polák

2020

Fatigue Fract Eng Mat Struct

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Superaustenitic steel Sanicro 25 has been subjected to out‐of‐phase thermomechanical fatigue cycles with 10‐min dwell at peak temperature in the temperature range from 250°C to 700°C. The effect of the dwells on the cyclic response, internal structure and damage mechanism was studied. Cyclic hardening/softening curves, cyclic stress–strain curves and fatigue life curves were evaluated. The internal structure and nanoparticles representing the obstacles for dislocation motion were analysed and identified by energy dispersive X‐ray spectroscopy in scanning transmission electron microscope. Scanning electron microscopy combined with focused ion beam and electron backscatter diffraction was adopted to reveal the respective mechanisms responsible for fatigue crack nucleation and propagation. Effect of dwells in in‐phase and in out‐of‐phase cycling on the fatigue behaviour, on the modification of internal structure and damage mechanisms, were analysed and discussed.

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Cyclic stress-strain behaviour under thermomechanical fatigue conditions – Modeling by means of an enhanced multi-component model

Cited by 2 publications

References 4 publications

3D Investigation of Damage During Strain‐Controlled Thermomechanical Fatigue of Cast Al–Si Alloys

3D Investigation of Damage During Strain‐Controlled Thermomechanical Fatigue of Cast Al–Si Alloys

The effect of dwell on thermomechanical fatigue in superaustenitic steel Sanicro 25

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