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 Temperature

Guth, Stefan; Doll, Simon; Lang, Karl‐Heinz

doi:10.1016/j.proeng.2014.06.260

Cited by 13 publications

(13 citation statements)

References 8 publications

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“…In case of OPTD tests, the plastic strain amplitude is also higher. The results are in agreement with reported shorter IP lives at high mechanical strain ranges for other Ni-base superalloys [2,[32][33][34]. Considering that cracks initiate early in OP lifetime, it can be inferred that the average crack propagation rate under IP conditions is significantly higher than under comparable OP conditions.…”

Section: Damage Mechanisms and Lifetime Behaviorsupporting

confidence: 91%

Influence of dwell times on the thermomechanical fatigue behavior of a directionally solidified Ni-base superalloy

Guth

Petráš

Škorík

et al. 2015

International Journal of Fatigue

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Section: Damage Mechanisms and Lifetime Behaviorsupporting

confidence: 91%

Influence of dwell times on the thermomechanical fatigue behavior of a directionally solidified Ni-base superalloy

Guth

Petráš

Škorík

et al. 2015

International Journal of Fatigue

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“…For the IP tests at ε a,mech = 0.28%: (1) In the course of the test, the crack cuts off initially curved crack paths by a more direct course. (2) Several clearly visible cracks along the casting structure are identifiable besides the main crack in the end of the lifetime.…”

Section: Short Crack Growth Tests Under Tmf Loading At T = 300-950 Cmentioning

confidence: 99%

“…Various publications address the influence of different TMF loading histories, like in-phase (IP), out-ofphase (OP), and phase shift (PS) loading on the lifetimes of cast polycrystalline nickel-based superalloys under uniaxial loading. [1][2][3][4][5] The publications show a trend: IP loading results in lower lifetimes than OP loading under high mechanical strains. For low mechanical strains, this trend seems to be inverted.…”

Section: Introductionmentioning

confidence: 99%

“…For low mechanical strains, this trend seems to be inverted. One explanation for this behavior is the higher amount of creep damage during IP loading at high mechanical strain amplitudes.The authors of several publications [1][2][3][4][5][6][7] analyzed the crack path after the experiments were finished by means of metallographic sections of the tested specimens. In contrast, in other references, 8,9 the potential drop technique was used to follow low cycle fatigue (LCF) short crack growth during the test.…”

Section: Introductionmentioning

confidence: 99%

“…This in turn supports the improvement of lifetime prediction concepts of gas turbine components under various TMF phases. Various publications address the influence of different TMF loading histories, like in‐phase (IP), out‐of‐phase (OP), and phase shift (PS) loading on the lifetimes of cast polycrystalline nickel‐based superalloys under uniaxial loading 1–5 . The publications show a trend: IP loading results in lower lifetimes than OP loading under high mechanical strains.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of damage mechanisms and short fatigue crack growth during thermomechanical fatigue loading of the nickel‐based superalloy Inconel 100

Schackert

Schweizer

2022

Fatigue Fract Eng Mat Struct

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Growing demands on gas turbines, meaning lower consumption and higher efficiency, is accompanied by higher temperatures inside the turbine. Better lifetime prediction concepts for thermomechanical fatigue (TMF) loading of gas turbine components are needed to ensure safe operation. The influence of the TMF loading history—either in‐phase (IP) or out‐of‐phase (OP)—on crack initiation and short crack growth is studied for the cast nickel‐based super alloy IN100, which is commonly used as blade material. Therefore, smooth specimens are loaded at two different mechanical strain levels with, respectively, two phase relationships, using a temperature cycle T = 300–950°C and T = 300–850°C. The replica technique is used to detect cracks in the order of tens of micrometers. The differences in crack initiation and short crack growth are studied for the different loading conditions and the development of the crack length evolving from multiple short cracks is investigated.

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Planar-Biaxial Thermo-mechanical Fatigue Behavior of Nickel-Base Superalloy Inconel 718 Under Proportional Loading

Böcker

Babu

Henkel

et al. 2022

Metall Mater Trans A

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The planar-biaxial thermo-mechanical fatigue behavior of nickel-base superalloy Inconel 718 was studied for selected proportional loading conditions, in particular biaxial strain ratios of 1.0, 0.6, and − 1.0. The cyclic temperature loading with minimum and maximum temperatures of 400 °C and 630 °C and a duration of 250 seconds was either In-Phase or Out-of-Phase to the mechanical axes. Besides the multiaxial tests, uniaxial thermo-mechanical fatigue tests were conducted In-Phase and Out-of-Phase with the same temperature cycle and cycle duration. The performed thermo-mechanical fatigue tests were analyzed regarding the deformation and lifetime behavior and compared with high-temperature isothermal low-cycle fatigue tests from a previous work of the authors. On the side of the lifetime description, a strain- and a stress-based approach were presented. For the planar-biaxial tests, the crack initiation mechanism and crack paths were shown.

show abstract

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 Temperature

Cited by 13 publications

References 8 publications

Influence of dwell times on the thermomechanical fatigue behavior of a directionally solidified Ni-base superalloy

Influence of dwell times on the thermomechanical fatigue behavior of a directionally solidified Ni-base superalloy

Investigation of damage mechanisms and short fatigue crack growth during thermomechanical fatigue loading of the nickel‐based superalloy Inconel 100

Planar-Biaxial Thermo-mechanical Fatigue Behavior of Nickel-Base Superalloy Inconel 718 Under Proportional Loading

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