Method for determining creep model parameters and predicting creep life of nickel-based single crystal high-temperature alloy

A determination method, technology of high-temperature alloys, applied in the field of materials

Pending Publication Date: 2021-07-16
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

A large amount of experimental data is required to fit the creep parameters and may not be applicable to all stress conditions

Method used

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  • Method for determining creep model parameters and predicting creep life of nickel-based single crystal high-temperature alloy
  • Method for determining creep model parameters and predicting creep life of nickel-based single crystal high-temperature alloy
  • Method for determining creep model parameters and predicting creep life of nickel-based single crystal high-temperature alloy

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Embodiment Construction

[0052] 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 examples 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.

[0053] Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of the specific details, or other methods, components, means, steps, etc. may be employed. In other instances, well-known methods, im...

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Abstract

The embodiment of the invention provides a method for determining creep model parameters and predicting creep life of nickel-based single crystal high-temperature alloy. The method comprises the following steps: providing a target test piece; performing multiple creep tests on the target test piece at a preset temperature to obtain test data of the multiple creep tests; determining a creep curve according to the test data; determining creep rates in a steady-state creep stage under different stress conditions according to the creep curve; according to the creep rate and the crystal plasticity theory, determining creep model parameters at the preset temperature through fitting. The creep parameters obtained through the method can simulate a creep curve under any stress condition, the method can be applied to the determination of the creep parameters at any temperature, and the result is reliable.

Description

technical field [0001] The present disclosure relates to the field of material technology, in particular, to a method for determining creep model parameters and predicting creep life of a nickel-based single crystal superalloy. Background technique [0002] The blade structure mainly bears axial centrifugal load in the service environment, and the creep failure and fatigue failure caused by centrifugal force are the main causes of blade damage. In recent years, researchers have done a lot of research on the creep and fatigue behavior of nickel-based single crystal superalloys and equiaxed crystals. [0003] The evolution of the microstructure during the rafting process determines the macroscopic mechanical properties of single crystal alloys in high-temperature service environments. Pearson et al. regard the rafting process as a hardening process that enhances the [001] oriented creep behavior of single crystal alloys, and believes that it inhibits climbing The dislocation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/18G01N3/02
CPCG01N3/02G01N3/18
Inventor 温志勋谷淑宁赵彦超张亚敏岳珠峰
Owner NORTHWESTERN POLYTECHNICAL UNIV
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