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Method for evaluating original fatigue quality of nickel-based single crystal gas film hole structural member

A nickel-based single crystal, quality evaluation technology, applied in the direction of testing metal structures, measuring devices, testing metals, etc., to achieve important engineering value, save economic and time costs, and achieve significant economic benefits

Pending Publication Date: 2019-07-19
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] However, fractures of turbine single crystal blades occur from time to time. Analysis of blade fractures and engine monitoring show that most of the fractures are caused by surface quality defects of the blades.

Method used

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  • Method for evaluating original fatigue quality of nickel-based single crystal gas film hole structural member
  • Method for evaluating original fatigue quality of nickel-based single crystal gas film hole structural member
  • Method for evaluating original fatigue quality of nickel-based single crystal gas film hole structural member

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Embodiment Construction

[0045] 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. 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 being omitted, or other methods, steps, etc. may be adopted. In other instances, well-known technical solutions have not been shown...

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Abstract

The invention relates to a method for evaluating the original fatigue quality of a nickel-based single crystal gas film hole structural member. The evaluation method comprises the following steps of providing a plurality of groups of test pieces, each group comprising a plurality of test pieces, and performing fatigue test on each group of test pieces under different preset conditions; after the fatigue test is completed, performing metallographic observation and fracture analysis on the test pieces; obtaining the test data, and determining the TTCI distribution according to the test data; determining an EIFS control equation according to the TTCI distribution and the fracture analysis data, and establishing the universal EIFS distribution; determining the service life of the test piece according to the universal EIFS distribution; determining an original fatigue quality conformance criterion; comparing the determined service life of the test piece with the criterion; and outputting anoriginal fatigue quality evaluation result. According to the evaluation method provided by the invention, the fatigue life of the gas film hole structure under different conditions can be predicted,so that the design of the original fatigue quality of the gas film hole structural member is judged based on the original fatigue quality conforming to the inspection criterion.

Description

technical field [0001] The present disclosure relates to the technical field of durability design, in particular to a method for evaluating the original fatigue quality of a nickel-based single crystal gas film hole structure. Background technique [0002] Durability design is one of the important ideas guiding the structural design of aircraft, automobiles, and ships. When performing durability analysis, it is necessary to obtain the original fatigue quality (IFQ, Initial Fatigue Quality) of materials and structures, and the equivalent initial flaw size (EIFS, Equivalent Initial Flaw Size) distribution, as an important part of the original fatigue mass model, is used to describe the original fatigue mass of the material structure, which directly affects the durability analysis results. [0003] At present, nickel-based single crystal materials are widely used in military and civil aircraft engine air-cooled turbine blades, and are increasingly used in space shuttle, ground ...

Claims

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Application Information

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IPC IPC(8): G06F17/50G01N33/204G01N33/2045
CPCG01N33/204G01N33/2045G06F2119/04G06F30/17G06F30/20
Inventor 温志勋岳珠峰王昭晗李振威程昊蒋波许壮壮
Owner NORTHWESTERN POLYTECHNICAL UNIV
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