Effect of microstructural characteristics on the low cycle fatigue behaviors of cast Ni-base superalloys

Kim, I.S.; Choi, Baig-Gyu; Jung, Jae‐Gil; Do, Jeonghyeon; Jo, Chang-Yong

doi:10.1016/j.matchar.2015.06.011

Cited by 36 publications

(9 citation statements)

References 25 publications

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“…4c and j or Fig. 5, under the same total strain amplitude with the testing temperature increasing from 900 ℃ to 1000 ℃, the thickness of oxidation layer evidently increases, which may induce a weak stress response [73,74] and decrease the fatigue life [29]. Furthermore, the plastic strain at 1000 ℃ is obviously higher than that of 900 ℃ at the same total strain amplitude, as demonstrated in Fig.…”

Section: The Effects Of Testing Temperature On Fatigue Properties Of ...mentioning

confidence: 83%

“…The repeated shearing of γ′ precipitates by dislocations through the ordered during fatigue tests also reduces the fatigue life and cyclic stress response of M951G alloy. Apart from the microstructural degradations and deformation mechanisms, the formation of brittle oxides also plays a key role on the fatigue properties of M951G alloy [29,73,74]. As illustrated in Fig.…”

Section: The Effects Of Testing Temperature On Fatigue Properties Of ...mentioning

confidence: 99%

“…thermal gradient [28][29][30][31], strain amplitude [32][33][34] and frequency [35,36] have been widely investigated on the LCF behaviors of superalloys. Among these influencing factors, testing 3 temperature and strain amplitude are of special interest [4,33,[37][38][39][40][41][42].…”

Section: Introductionmentioning

confidence: 99%

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Low cycle fatigue behavior and microstructural evolution of nickel-based superalloy M951G at elevated temperatures

Cui

Liu

Peng

et al. 2020

Materials Characterization

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Section: The Effects Of Testing Temperature On Fatigue Properties Of ...mentioning

confidence: 83%

Section: The Effects Of Testing Temperature On Fatigue Properties Of ...mentioning

confidence: 99%

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Low cycle fatigue behavior and microstructural evolution of nickel-based superalloy M951G at elevated temperatures

Cui

Liu

Peng

et al. 2020

Materials Characterization

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“…In general, the cyclic hardening behavior may be attributed to the impedance of moving dislocations [22], such as dislocation‐dislocation and dislocation‐precipitate interactions [23, 24]. The cyclic softening behavior could be attributed to the shearing γ′ precipitates and rapid formation of dislocation networks [25, 26].…”

Section: Resultsmentioning

confidence: 99%

Fatigue‐creep interaction performance of Incoloy 825 nickel‐based superalloy at 650 °C

Huo

Zhu

et al. 2021

Materialwissenschaft Werkst

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The fatigue‐creep interaction performance of Incoloy 825 nickel‐based superalloy at 650 °C was investigated through introducing the tensile, compressive, and tensile‐compressive strain hold time at the controlled total strain amplitude Δϵt = 0.3 %∼0.7 %. The results show that the Incoloy 825 nickel‐based superalloy exhibits the cyclic hardening behavior, the cyclic hardening behavior followed by cyclic softening behavior and the cyclic hardening behavior followed by cyclic stability during the cyclic deformation with tensile strain hold time, while the alloy exhibits the cyclic hardening behavior and the cyclic hardening behavior followed by the cyclic stability during the cyclic deformation with compressive and tensile‐compressive strain hold time. The relationship between both plastic and elastic strain amplitudes with reversals to failure for the alloy shows a single slope linear behavior, which can be described by the Coffin‐Manson and Basquin equations, respectively. The deformation mechanism of the alloy under three loading condition of fatigue‐creep interaction is mainly the planar slip. In addition, under three loading condition of fatigue‐creep interaction, the cracks initiate and propagate in the transgranular mode.

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“…However, conventional manufacturing methods such as forging and casting, which were used to build hot parts, are cumbersome in steps and time-/material-consuming [4]. Meanwhile, melt defects, including carbides and segregations [5,6], hinder the improvement of the high-temperature performance of as-built GH3536 superalloys. Since 3D-printing technology has shown great potential in replacing or optimizing conventionally industrial manufacturing technologies, applying laser-additive manufacturing in building superalloy has been also wildly investigated [7].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Fracture Behavior of Laser Powder-Bed-Fused GH3536 Superalloy

Qing

Zhang

et al. 2022

Metals

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Heat treatment (HT) is an important approach to tune the structure and mechanical properties of as-printed or hot-isostatic-pressed (HIPed) additive manufacturing materials. Due to the carbide precipitates extensively existing after HT with air cooling, this paper studies the microstructure and mechanical behavior of laser powder-bed-fused (L-PBFed) GH3536 superalloy with laminar carbide precipitates at grain boundaries. By comparing with air-cooling samples and water-quenched samples, the results revealed that air cooling often introduced precipitates at grain boundaries, which impede the plastic deformation and are prone to lead to severe transgranular cracks on the fracture surface, contributing to a higher strain-hardening rate but lower ductility of HTed sample. Water quench can largely eliminate the grain-boundary precipitates, contributing to an optimized ductility even with smaller grain size. This work provides more details on the precipitate-deformation relation after HT.

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Effect of microstructural characteristics on the low cycle fatigue behaviors of cast Ni-base superalloys

Cited by 36 publications

References 25 publications

Low cycle fatigue behavior and microstructural evolution of nickel-based superalloy M951G at elevated temperatures

Low cycle fatigue behavior and microstructural evolution of nickel-based superalloy M951G at elevated temperatures

Fatigue‐creep interaction performance of Incoloy 825 nickel‐based superalloy at 650 °C

Mechanical Properties and Fracture Behavior of Laser Powder-Bed-Fused GH3536 Superalloy

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