2019
DOI: 10.1016/j.ijfatigue.2019.01.014
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Thermomechanical fatigue crack growth in a single crystal nickel base superalloy

Abstract: Thermomechanical fatigue crack growth in a single crystal nickel base superalloy was studied. Tests were performed on single edge notched specimens, using in phase and out of phase thermomechanical fatigue cycling with temperature ranges of 100-750°C and 100-850°C and hold times at maximum temperature ranging from 10s to 6h. Isothermal testing at 100°C, 750°C and 850°C was also performed using the same test setup. A compliancebased method is proposed to experimentally evaluate the crack opening stress and ther… Show more

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Cited by 32 publications
(9 citation statements)
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“…In addition, the utilization of normalized compliance parameters to fit the crack length can avoid the influence of temperature variation on specimen compliance. This method has also been verified in the relevantly published literatures 26–28 . However, the compliance method still has some limitations and cannot be applied to some complex test situations.…”
Section: Introductionmentioning
confidence: 72%
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“…In addition, the utilization of normalized compliance parameters to fit the crack length can avoid the influence of temperature variation on specimen compliance. This method has also been verified in the relevantly published literatures 26–28 . However, the compliance method still has some limitations and cannot be applied to some complex test situations.…”
Section: Introductionmentioning
confidence: 72%
“…Another commonly used method to obtain crack length is the compliance method 26–28 . Similar to the DCPD method, this method establishes the relationship between crack length and specimen compliance under a certain specimen size.…”
Section: Introductionmentioning
confidence: 99%
See 1 more Smart Citation
“…Most studies have investigated thermomechanical fatigue (TMF) of nickelbased superalloys, but the majority of the work have been aimed at characterizing the cyclic deformation behavior and crack initiation life. [23][24][25][26][27][28][29][30][31] For instance, crack paths in single-crystal Ni-based superalloys under isothermal and TMF show that crack paths under isothermal and TMF are influenced by several factors, including temperature, strain range, dwells during the cycle, microstructure, crystal orientation, the environment, the strain-temperature phasing in TMF, and frequency. [30] In addition, extensive efforts have been focused on the fatigue crack growth (FCG) behavior of nickel-based superalloys, especially for polycrystalline and powder metallurgical materials in recent years.…”
Section: Introductionmentioning
confidence: 99%
“…Over the past 50 years, numerous theoretical analyses, experimental explorations, and computer simulation studies have been conducted on crack deformation of superalloys. Most studies have investigated thermomechanical fatigue (TMF) of nickel‐based superalloys, but the majority of the work have been aimed at characterizing the cyclic deformation behavior and crack initiation life . For instance, crack paths in single‐crystal Ni‐based superalloys under isothermal and TMF show that crack paths under isothermal and TMF are influenced by several factors, including temperature, strain range, dwells during the cycle, microstructure, crystal orientation, the environment, the strain‐temperature phasing in TMF, and frequency .…”
Section: Introductionmentioning
confidence: 99%