Optimization of investment casting process for K477 superalloy aero-engine turbine nozzle by simulation and experiment

Hao, Xin; Liu, Guohuai; Wang, Ye; Wu, Shiping; Wang, Zhaodong

doi:10.1007/s41230-022-1092-4

Cited by 9 publications

(3 citation statements)

References 21 publications

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“…(2) vp (1) vp e (3) vp where, is the strain rate under uniaxial load; C and j are the coefficients correlated to the strain rate.…”

Section: Perzyna Modelmentioning

confidence: 99%

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Elastic-viscoplastic constitutive equations of K439B superalloy and thermal stress simulation during casting process

Sui,

Shan,

Wang

et al. 2023

China Foundry

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K439B nickel-based superalloy is a new type of high-temperature material. There is insufficient research on its constitutive equations and numerical modeling of thermal stress. Isothermal tensile experiments of K439B superalloy at different temperatures (20 °C-1,000 °C) and strain rates (1.33×10 -3 s -1 -5.33×10 -3 s -1 ) were performed by using a Gleeble-3800 simulator. The elastic moduli at different temperatures (20 °C-650 °C) were measured by resonance method. Subsequently, stress-strain curves were measured for K439B superalloy under different conditions. The elastic-viscoplastic constitutive equations were established and the correspongding parameters were solved by employing the Perzyna model. The verification results indicate that the calculated values of the constitutive equations are in good agreement with the experimental values. On this basis, the influence of process parameters on thermal stress was investigated by numerical simulation and orthogonal experimental design. The results of orthogonal experimental design reveal that the cooling mode of casting has a significant influence on the thermal stress, while pouring temperature and preheating temperature of shell mold have minimal impact. The distribution of physical fields under optimal process parameters, determined based on the orthogonal experimental design results, was simulated. The simulation results determine separately the specific positions with maximum values for effective stress, plastic strain, and displacement within the casting. The maximum stress is about 1,000.0 MPa, the plastic strain is about 0.135, and the displacement is about 1.47 mm. Moreover, the distribution states of thermal stress, strain, and displacement are closely related to the distribution of the temperature gradient and cooling rate in the casting. The research would provide a theoretical reference for exploring the stress-strain behavior and numerical modeling of the effective stress of the alloy during the casting process.

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“…(2) vp (1) vp e (3) vp where, is the strain rate under uniaxial load; C and j are the coefficients correlated to the strain rate.…”

Section: Perzyna Modelmentioning

confidence: 99%

“…which are widely used in aerospace fields, such as aeroengines, turbine blades and disks, etc [1] . As the engine thrust increases, the inlet temperature of the turbine increases accordingly, which puts forward higher requirements for the mechanical properties of the alloy.…”

mentioning

confidence: 99%

Elastic-viscoplastic constitutive equations of K439B superalloy and thermal stress simulation during casting process

Sui,

Shan,

Wang

et al. 2023

China Foundry

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show abstract

“…

Ni-based single-crystal superalloys have been extensively utilized in aero-engines for the production of hot-end components due to their excellent high-temperature mechanical properties [1][2][3][4] . In the pursuit of heightened thermal efficiency, single-crystal superalloys are progressively being introduced into industrial gas turbines (IGTs) [5][6][7] to fabricate single-crystal blades, thereby enhancing the turbine front-end temperature.

…”

mentioning

confidence: 99%

Oxidation behavior of 4774DD1 Ni-based single-crystal superalloy at 980 °C in air

Fang,

Li,

Yang

et al. 2024

China Foundry

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Process parameter optimization of K477 and GH4169 for defect control in laser-directed energy deposition using Taguchi design of experiments

Li,

Chen,

Hou

et al. 2024

Int J Adv Manuf Technol

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Optimization of investment casting process for K477 superalloy aero-engine turbine nozzle by simulation and experiment

Cited by 9 publications

References 21 publications

Elastic-viscoplastic constitutive equations of K439B superalloy and thermal stress simulation during casting process

Elastic-viscoplastic constitutive equations of K439B superalloy and thermal stress simulation during casting process

Oxidation behavior of 4774DD1 Ni-based single-crystal superalloy at 980 °C in air

Process parameter optimization of K477 and GH4169 for defect control in laser-directed energy deposition using Taguchi design of experiments

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