Evaluation of high- temperature behavior of CMSX4 + yttrium single- crystal nickel- base superalloy

Marchionni, M.; Goldschmidt, D.; Maldini, M.

doi:10.1007/bf02661732

Cited by 8 publications

(2 citation statements)

References 5 publications

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“…Nickel-based single-crystal superalloys are widely used in the turbine blades of aeroengines due to its good high temperature resistance (Marchionni et al. , 1992).…”

Section: Introductionmentioning

confidence: 99%

Study on creep behaviors of nickel-based single-crystal alloys considering microstructure evolution

Ai,

Wang,

Luo

et al. 2023

MMMS

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Purpose The purpose of this study is to describe the mechanism of single-crystal high-temperature creep deformation, predict the creep life more accurately and study the creep constitutive and lifetime models with microstructure evolution.Design/methodology/approachThe mechanical properties of nickel-based single-crystal superalloy are closely related to the γ' phase. Creep tests under four different temperature and stress conditions were carried out. The relationship between creep temperature, stress and life is fitted by numerical method, and the creep activation energy is obtained. The creep fracture surface, morphology and evolution of strengthening phase (γ') and matrix phase (γ) during different creep periods were observed by scanning electron microscope. With the increase of creep temperature, the rafting time is advanced. The detailed morphology and evolution of dislocations were observed by transmission electron microscope (TEM).FindingsWith the increase of creep temperature, the rafting time is advanced. The detailed morphology and evolution of dislocations were observed by TEM. Dislocations are mainly concentrated in the γ channel phase, especially at high temperature and low stress.Originality/valueA creep constitutive model based on the evolution of γ' phase size and γ channel width was proposed. Compared with the experimental results, the predicted creep life is within 1.4 times error dispersion band.

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“…Nickel-based single-crystal superalloys are widely used in the turbine blades of aeroengines due to its good high temperature resistance (Marchionni et al. , 1992).…”

Section: Introductionmentioning

confidence: 99%

Study on creep behaviors of nickel-based single-crystal alloys considering microstructure evolution

Ai,

Wang,

Luo

et al. 2023

MMMS

View full text Add to dashboard Cite

show abstract

“…Because of a combination of creep, fatigue and environment attack could cause the failure of the components, much work has been done on thermo-mechanical fatigue (TMF) to simulate the situations. [3][4][5] In addition, the general TMF study of Ni-based single crystal superalloy TMS-75 and CMSX-4 have been introduced. [6,7] However, due to the complex situations of TMF, e.g.…”

Section: Introductionmentioning

confidence: 99%

The Critical Resolved Shear Stress for Twinning in a Modern Single Crystal Ni‐Based Superalloy TMS‐82

2013

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Detailed observations of the microstructural evolution were performed in single crystal superalloy TMS-82 after thermo-mechanical cycling. An interesting phenomenon shows that the area close to the fracture tends to create a lot of deformation twins, while the area far from the fracture exhibits few deformation twins. Theoretical calculations were further analyzed in an effort to clarify the critical resolved shear stress for twinning in single crystal superalloy by consideration of the special shearing mechanisms of twinning dislocations. The feature that a high density of deformation twins occurs in the area close to the fracture of superalloy TMS-82 due to the stress concentration.

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Dependence of the Isothermal Fatigue Behaviour of a Monocrystalline Nickel-Base Superalloy on the γ/γ′-Morphology

Ott¹,

Mughrabi²

1996

Fatigue '96

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Evaluation of high- temperature behavior of CMSX4 + yttrium single- crystal nickel- base superalloy

Cited by 8 publications

References 5 publications

Study on creep behaviors of nickel-based single-crystal alloys considering microstructure evolution

Study on creep behaviors of nickel-based single-crystal alloys considering microstructure evolution

The Critical Resolved Shear Stress for Twinning in a Modern Single Crystal Ni‐Based Superalloy TMS‐82

Dependence of the Isothermal Fatigue Behaviour of a Monocrystalline Nickel-Base Superalloy on the γ/γ′-Morphology

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