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Method for evaluating performance of monocrystalline high-temperature alloy in special environments

A high-temperature alloy and evaluation method technology, applied in the field of high-temperature alloys, can solve problems such as no available data reference, no special equipment for molding, blank experimental data, etc.

Inactive Publication Date: 2016-12-07
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, due to the lack of research on the performance of materials in such special environments at home and abroad, the relevant experimental data is basically blank, so there is basically no available data for reference when designing corresponding parts.
On the other hand, there is currently no mature method on the market that can accurately test the performance of single crystal superalloys in special environments, and there is no special equipment for forming such experiments

Method used

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  • Method for evaluating performance of monocrystalline high-temperature alloy in special environments
  • Method for evaluating performance of monocrystalline high-temperature alloy in special environments
  • Method for evaluating performance of monocrystalline high-temperature alloy in special environments

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Experimental program
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Effect test

Embodiment 1

[0020] First, the single crystal superalloy (DD405 alloy) is processed into performance test samples, and the processed performance test samples are placed in the inner tube of the glass tube. After the air in the tube is drawn out, it is filled with ammonia gas at a pressure of 0.02MPa, and then the glass The inner tube of the tube is closed, and the diameter of the inner tube of the glass tube is 13 mm.

[0021] In order to prevent the glass tube from rupturing in high temperature environment, double-layer glass tube encapsulation is adopted. The inner tube of the first encapsulated glass tube is placed in the outer tube of the larger diameter glass tube (diameter 15mm). After the air in the glass tube sandwich is exhausted, Then fill the ammonia gas with a pressure of 0.02MPa, and then seal the outer tube of the glass tube (such as figure 1 ).

[0022] Place the packaged sample in a high-temperature muffle furnace, raise the temperature to 1000°C, and take out the glass tube aft...

Embodiment 2

[0025] First, the single crystal superalloy (DD405 alloy) is processed into performance test samples. The processed performance test samples are placed in the inner tube of the glass tube. After the air in the tube is drawn out, it is filled with nitrogen at a pressure of 0.02MPa, and then the glass tube The inner tube of the glass tube is closed, and the diameter of the inner tube of the glass tube is 13mm.

[0026] In order to prevent the glass tube from rupturing in high temperature environment, double-layer glass tube encapsulation is adopted. The inner tube of the first encapsulated glass tube is placed in the outer tube of the larger diameter glass tube (diameter 15mm). After the air in the glass tube sandwich is exhausted, Then fill the ammonia gas with a pressure of 0.02MPa, and then seal the outer tube of the glass tube (such as image 3 ).

[0027] Place the packaged sample in a high-temperature muffle furnace, raise the temperature to 1000°C, and take out the glass tube ...

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Abstract

The invention discloses a method for evaluating performance of monocrystalline high-temperature alloy in special environments and belongs to the technical field of high-temperature alloy. The method includes: adopting a method of filling a heat-resistant glass tube with special gas to create environments with nitrogen and ammonia, and placing the processed monocrystalline high-temperature alloy in the environments; placing the whole device in a high-temperature furnace for thermal treatment, and cooling in air; using a common universal tension tester to test performance of the treated alloy. By adopting the method, influence on microstructure and tensile performance of nickel-based monocrystalline high-temperature alloy in the environments with high-temperature nitrogen and ammonia is evaluated successfully, and processing expense of especial equipment which is high in cost is avoided effectively. The method is simple, effective and suitable for being used to evaluate influence of special environments on material performance.

Description

Technical field: [0001] The invention relates to the technical field of superalloys, in particular to a method for evaluating the performance of single crystal superalloys in special environments. Background technique: [0002] As we all know, single crystal superalloy is a kind of advanced casting superalloy. Its high-temperature strength is significantly improved compared with ordinary equiaxed crystal alloy. It is currently the preferred material for hot-end components of advanced aviation, aerospace, and energy engines. With the wide application of single crystal superalloys, many special environments have attracted more and more attention, such as the performance of these materials in high-temperature nitrogen and ammonia environments. However, due to the lack of research on the performance of materials under such special environments at home and abroad, the relevant experimental data are basically blank, so there is basically no data reference available when designing corre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/00G01N33/20
CPCG01N25/00G01N33/20
Inventor 周亦胄刘纪德金涛孙晓峰
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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