Prediction method for creep residual life of nickel-based single crystal turbine blade

A technology of nickel-based single crystal and turbine blades, which is applied in the direction of instruments, electrical digital data processing, geometric CAD, etc., can solve the problem of inaccurate prediction of the remaining life of blades, and achieve the effect of good accuracy

Active Publication Date: 2020-04-14
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0006] The purpose of the present invention is to overcome the inaccurate prediction method for the remaining life of the nickel-based single crystal turbine blade creep remaining life of the above-mentioned prior art, and

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  • Prediction method for creep residual life of nickel-based single crystal turbine blade
  • Prediction method for creep residual life of nickel-based single crystal turbine blade
  • Prediction method for creep residual life of nickel-based single crystal turbine blade

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[0040] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted.

[0041] The excellent high-temperature mechanical properties of nickel-based alloys are mainly derived from their γ (matrix phase) and γ' (strengthening phase) two-phase microstructure and their composition design, in which the initial microstructure is a cubic shape with a high volume fraction face centered cubic structure. The γ' precipitate phase is formed uniformly and coherently in the γ matrix phase. The γ′ phase grows a...

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Abstract

The invention relates to the technical field of reliability, and provides a prediction method for the creep residual life of a nickel-based single crystal turbine blade. The prediction method for thecreep residual life of the nickel-based single crystal turbine blade comprises the following steps: establishing a creep damage equation and a creep constitutive equation of a nickel-based single crystal material based on a crystal plasticity theory; obtaining first microstructure evolution of the nickel-based single crystal material in the creep process; establishing a residual life prediction equation of the nickel-based single crystal material according to the first microstructure evolution, the creep damage equation and the creep constitutive equation of the nickel-based single crystal material in the creep process; obtaining second microstructure evolution of the turbine blade in work; and substituting the second microstructure evolution into the residual life prediction equation to obtain the creep residual life of the turbine blade in work. The residual life of the blade can be obtained by quantitatively describing microstructure evolution of the turbine blade material in work and substituting the microstructure evolution into the creep residual life equation based on the crystal plasticity theory. Compared with the prior art, the method has better accuracy.

Description

technical field [0001] The invention relates to the technical field of reliability, in particular to a method for predicting the remaining life of nickel-based single crystal turbine blade creep. Background technique [0002] Nickel-based single crystal superalloys have excellent mechanical properties such as creep, fatigue and oxidation resistance at high temperatures, and are widely used in the manufacture of aeroengine turbine blades. In the service environment, it mainly bears the axial centrifugal load, and the creep failure caused by centrifugal force is the main cause of structural damage. In order to fully exploit the potential of single crystal materials and ensure reliability within the design life, it is necessary to establish an accurate remaining life prediction model for single crystal blades in service. [0003] In the prior art, the creep remaining life prediction method of nickel-based single crystal turbine blades is inaccurate in predicting the remaining ...

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Application Information

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IPC IPC(8): G06F30/23G06F30/17G06F119/04G06F119/08G06F119/14
Inventor 温志勋岳珠峰张诚江童文伟毛倩竹卢广先王平
Owner NORTHWESTERN POLYTECHNICAL UNIV
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