Nickel-based single crystal blade performance evaluation method based on directly cut micro sample

A nickel-based single crystal and blade technology is applied in the direction of strength characteristics, the use of repetitive force/pulsation force to test the strength of materials, and measurement devices. It can solve the problems that cannot truly and accurately reflect service engine blades, and reduce test costs. The effect of true and accurate performance

Inactive Publication Date: 2019-07-16
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0006] The purpose of the present invention is to overcome the above-mentioned deficiency of the prior art that cannot truly and accurately reflect the performance of the engine blade in service, and

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  • Nickel-based single crystal blade performance evaluation method based on directly cut micro sample
  • Nickel-based single crystal blade performance evaluation method based on directly cut micro sample
  • Nickel-based single crystal blade performance evaluation method based on directly cut micro sample

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[0033] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments, however, can be embodied in various 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.

[0034] In the fault diagnosis of aero-engines and the analysis of the causes of aircraft crashes, blade breakage is often the main reason. Due to the seriousness of the consequences of blade failure and the suddenness of the failure, blade breakage has become one of the bottlenecks restricting the development and application of engines. In order to break through this bottleneck, in addition to improving the level of materi...

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Abstract

The invention relates to the technical field of engines and provides a nickel-based single crystal blade performance evaluation method based on a directly cut micro sample. The nickel-based single crystal blade performance evaluation method based on the directly cut micro sample comprises the following steps: firstly obtaining an initial sample of a nickel-based single crystal blade; observing a first microscopic structure of the initial sample; performing a fatigue test on the initial sample under preset test parameters, thus a tested sample is obtained; observing a second microscopic structure of the tested sample; and according to the preset test parameters, the first microscopic structure and the second microscopic structure, evaluating performance of the nickel-based single crystal blade. Compared with the prior art, test cost is reduced, difference of microscopic structures of a material is considered, and performance of a service engine blade can be really and accurately reflected.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a method for evaluating the performance of nickel-based single crystal blades based on directly cutting miniature samples. Background technique [0002] Nickel-based single-crystal blades are the first key component of aero-engines, and they have been used in harsh environments of high temperature, high pressure and high speed for a long time. Under the coupled effects of multiple fields such as temperature field, flow field, and stress field generated by high-speed centrifugal force, it is easy to cause degradation of the blade material structure and performance. Therefore, it is particularly important to accurately evaluate the performance of nickel-based single crystal blades. [0003] The performance evaluation methods of nickel-based single crystal blades in the prior art cannot truly and accurately reflect the performance of engine blades in service. [0004] Therefore, i...

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Application Information

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IPC IPC(8): G01N3/32G01N3/06
CPCG01N3/06G01N3/068G01N3/32G01N2203/0005G01N2203/0073G01N2203/0226G01N2203/0647
Inventor 温志勋岳珠峰蒋波程昊王昭晗许壮壮谷淑宁
Owner NORTHWESTERN POLYTECHNICAL UNIV
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