Tensile behavior of the second generation single crystal superalloy DD6

Shi, Zhen-xue; Liu, Shizhong; Yu, Jian; Li, Jiarong

doi:10.1016/s1006-706x(15)30065-0

Cited by 31 publications

(9 citation statements)

References 11 publications

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“…Therefore, a peak is produced in the stress vs. temperature curve. This phenomenon has also been observed in previous studies of DD6 under quasi-static condition [29,30]. Fig.…”

Section: Tensile Properties Of Dd6 Superalloysupporting

confidence: 88%

Dynamic tensile properties of a single crystal Nickel-base superalloy at high temperatures measured with an improved SHTB technique

Wang

Guo

et al. 2016

Materials Science and Engineering: A

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“…Therefore, a peak is produced in the stress vs. temperature curve. This phenomenon has also been observed in previous studies of DD6 under quasi-static condition [29,30]. Fig.…”

Section: Tensile Properties Of Dd6 Superalloysupporting

confidence: 88%

Dynamic tensile properties of a single crystal Nickel-base superalloy at high temperatures measured with an improved SHTB technique

Wang

Guo

et al. 2016

Materials Science and Engineering: A

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“…Further research [ 35,36 ] shows, from 23 to 750 °C, the diffusion of atoms in the alloy is weak, the dislocation movement is mainly based on the shear γ ' phase, and a large number of stacking faults are formed in the matrix channel, which effectively hinders the movement of dislocations. The tensile deformation mechanism is mainly dislocation cutting γ ' phase, and the fracture mechanism is the cleavage‐like fracture.…”

Section: Resultsmentioning

confidence: 99%

Microstructure and Tensile Behavior of a Novel Monocrystalline Co‐Based Superalloy at Different Temperatures

et al. 2022

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Microstructures and tensile properties of a novel monocrystalline Co‐based superalloy are investigated by experiments and finite element simulation. Microstructures of heat‐treated alloys are composed of γ and cubical γ' precipitates without the presence of the secondary phase, and the fraction of γ' phase is about 86%. The experimental results show that tensile properties of the novel monocrystalline Co‐based superalloy have abnormal yield behavior. In low and medium temperature ranges (R.T. 850 °C), the yield stress increases gradually with temperature increase and the tensile fracture surface is characterized by cleavage rupture. At 850 °C, fracture mechanism is composite of cleavage and microporous. While above 850 °C, the yield stress decreases rapidly, and fracture surface is constituted of mixed fracture surface of dimples and micropores. The simulation results show that the tensile stress‐–strain curves are well fitted to the experimental data at different temperatures.

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“…It is worth mentioning that the material constants A oct , R oct , A cub , and R cub are related to the orientation factor f which is defined as:

f goodbreak= E_{[001]} / E_{[italichkl]}

where [ hkl ] is Miller indices in material coordinate system, E [001] and E [ hkl ] are the elastic modulus at [001] orientation and [ hkl ] orientation 48,49 . The elastic modules and ultimate tensile strengths of nickel‐based single crystal superalloy DD6 in [001], [011], and [111] orientation are shown in Table 2 and Figure 1(A), respectively 47,50,51 . The specimen used in uniaxial tensile tests in Refs.…”

Section: Anisotropic Creep Lifetime Prediction Modelmentioning

confidence: 99%

A thickness‐sensitive and orientation‐related creep lifetime prediction method of nickel‐based single crystal superalloy

Zhang

Wang

Liu

et al. 2023

Fatigue Fract Eng Mat Struct

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Considering the anisotropy of nickel‐based single crystal superalloy, an anisotropic creep lifetime prediction model based on slip plane damage is developed. The predicted results indicate that the lifetime prediction model could predict the creep lifetimes of nickel‐based single crystal superalloy with different orientations accurately. Furthermore, in order to reveal the damage mechanism of nickel‐based single crystal thin‐walled specimen, creep experiment and failure analysis of thin‐walled specimen are conducted, and there are obvious differences in damage mechanisms between surface and interior of the thin‐walled specimen. In this paper, both thickness debit effect and abnormal thickness debit effect are considered to be caused by the damage differences between surface and interior of the thin‐walled specimen, and zone‐based failure criteria considering thickness debit effect and abnormal thickness debit effect are proposed. Finally, combining the anisotropic creep lifetime prediction model and zone‐based failure criteria, the creep lifetime prediction of DD6 specimen with different thickness is conducted. The predicted lifetimes are within a scatter band of factor 2.26, and the predicted laws between creep lifetimes and thicknesses of the specimens are in good agreement with the experimental results, which verifies the rationality and accuracy of the thickness‐sensitive creep lifetime prediction method established in this paper.

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Tensile behavior of the second generation single crystal superalloy DD6

Cited by 31 publications

References 11 publications

Dynamic tensile properties of a single crystal Nickel-base superalloy at high temperatures measured with an improved SHTB technique

Dynamic tensile properties of a single crystal Nickel-base superalloy at high temperatures measured with an improved SHTB technique

Microstructure and Tensile Behavior of a Novel Monocrystalline Co‐Based Superalloy at Different Temperatures

A thickness‐sensitive and orientation‐related creep lifetime prediction method of nickel‐based single crystal superalloy

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