CN112595696A - In-situ characterization method for bonding interface state under irradiation condition - Google Patents
In-situ characterization method for bonding interface state under irradiation condition Download PDFInfo
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- CN112595696A CN112595696A CN202011459774.2A CN202011459774A CN112595696A CN 112595696 A CN112595696 A CN 112595696A CN 202011459774 A CN202011459774 A CN 202011459774A CN 112595696 A CN112595696 A CN 112595696A
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
Abstract
The invention relates to an in-situ characterization method of a bonding interface state, in particular to an in-situ characterization method of a bonding interface state under an irradiation condition. The invention aims to solve the technical problems that when the existing method adopts a ray inspection method, the development of a service site is limited by space and the use convenience is insufficient due to the dependence on large-scale special equipment such as a radiation source and the like, when an ultrasonic inspection method is adopted, the requirement on personnel protection under the irradiation condition is high and the requirement on long-term use is difficult to meet, and when structural dynamics analysis is adopted, the radiation tolerance of a sensor and an adhesive for sticking the sensor needs to be specially researched, and provides an in-situ characterization method of the state of a bonding interface under the irradiation condition. The method takes nuclear power equipment and the like related to irradiation conditions as main application objects, and realizes non-contact, unmanned, simple, safe, reliable and timely representation of the state of the bonding interface through the steps of sampling the bonding interface, calibrating a typical state, detecting the service site in situ in a non-contact manner and the like.
Description
Technical Field
The invention relates to an in-situ characterization method of a bonding interface state, in particular to an in-situ characterization method of a bonding interface state under an irradiation condition.
Background
The bonding structure is formed by bonding different materials, and can simultaneously realize the functions of bearing, sealing, heat prevention and the like in the field of engineering structures. Due to the discontinuous characteristic of the geometric configuration and the strong discontinuity property of the physical property, the bonding interface has the defects of high mechanical stress, microcrack of the bonding interface and the like.
For the bonding interface of nuclear power pipeline structure and protective coating, the generation of defects such as microcracks can cause the deviation of service state and design state, and seriously affect the service reliability, so the in-situ characterization of the bonding interface state under the irradiation condition becomes the basic requirement for carrying out integrity analysis and avoiding structural failure.
The existing in-situ characterization method for the bonding interface state mainly comprises three methods, namely ray inspection, ultrasonic inspection and structural dynamics analysis.
And (3) ray flaw detection: the method is characterized in that the bonding interface between a lining layer of the casting type solid engine and a grain is researched by adopting a ray tomography technology, and the difference of the bonding interface state before and after a freezing experiment and defect identification are analyzed. The defects are that radiographic inspection depends on large-scale special equipment such as a radiation source, the expansion of a service site is limited by space, and the use convenience is insufficient.
Ultrasonic flaw detection: a reference block is designed, and the non-ideal condition of the CuW/Cu (CrCu) joint surface of the contact is researched by utilizing ultrasonic flaw detection. The ultrasonic flaw detection method has the defects that the ultrasonic flaw detection is mainly carried out by hand, the requirement on personnel protection under the irradiation condition is high, and the requirement on long-term use is difficult to meet.
Structural dynamics analysis: based on the structural dynamics characteristics such as natural frequency, damping ratio and the like, the correlation between the bonding interface state of the concrete material and the coarse aggregate and the transfer function of the concrete structure is researched. The method has the disadvantages that a structural dynamics analysis method needs to stick a sensor array such as a displacement sensor or a strain sensor near a bonding interface, and the radiation tolerance of the sensor and an adhesive for sticking the sensor needs to be specially researched.
Disclosure of Invention
The invention aims to solve the problems that when the existing in-situ characterization method of the bonding interface state under the irradiation condition adopts a ray inspection method, the expansion of a service site is limited by space and the use convenience is insufficient due to the dependence on large-scale special equipment such as a radiation source and the like; when the ultrasonic flaw detection method is adopted, the requirement on personnel protection under the irradiation condition is high and the requirement on long-term use is difficult to meet; when structural dynamics analysis is adopted, the technical problem that the radiation tolerance of the sensor and the adhesive for sticking the sensor needs special research is solved, and an in-situ characterization method of the state of a sticking interface under an irradiation condition is provided.
In order to solve the technical problems, the technical solution provided by the invention is as follows:
an in-situ characterization method for the bonding interface state under irradiation condition is characterized by comprising the following steps:
1) adhesive interface sampling
Cutting and sampling the typical state part of the irradiated real component bonding interface according to the irradiation failure mechanism and the degradation rule of the target bonding interface, preparing the table and certificate in the typical state by using the sampled product, recording the number of the table and certificate as n, numbering each piece as 1, 2 and … n, wherein n is more than or equal to 3;
2) calibrating a typical state
2.1) Signal analysis based on laser-induced transient Grating Spectroscopy
Irradiating the surface certificate 1 prepared in the step 1) by using the laser-induced transient grating, obtaining a spectrogram of the surface certificate 1 by using spectral analysis equipment, carrying out non-contact pickup on characteristic signals in the spectrogram, marking characteristic signal data in a typical state as DI-1, and marking laser parameters used by the laser-induced transient grating as PaI;
2.2) defining failure classes
2.2.1) scanning and three-dimensional reconstruction of the bonding interface of the surface certificate 1 by adopting a micro-focus tomography device, marking the reconstructed bonding interface with a state according to a target bonding interface irradiation failure mechanism and a degradation rule, and defining the failure grade as Da-1;
2.2.2) the same way as in step 2.1), step 2.2.1) is used to traverse the remaining table certificates, marking the typical state signature data as DI-i (i ═ 2, 3, … n), corresponding to the definition of a failure level Da-i (i ═ 2, 3, … n);
2.2.3) fitting all failure levels Da-i and typical state characteristic signal data DI-i, and establishing a correlation mathematical model M;
3) non-contact in-situ detection of service site
3.1) laser-induced transient Grating Spectroscopy characterizing A target
After the laser induced transient grating is set by the laser parameter PaI marked in the step 2.1), irradiating the characterization target, obtaining a spectrogram of the characterization target by using a spectrum analysis device, carrying out non-contact pickup on a characteristic signal in the spectrogram, and marking the characteristic signal data as DTest-1;
3.2) feature Signal processing
And (3) obtaining a failure grade representing a target by using the correlation mathematical model M obtained in the step 2.2.3) and taking the characteristic signal data DTest-1 as input.
Further, in step 1), the irradiation failure mechanism is the only failure mode introduced in the sampling process.
Further, in the step 1), n is more than or equal to 5.
Compared with the prior art, the invention has the following beneficial effects:
1. the in-situ characterization method for the bonding interface state under the irradiation condition provided by the invention takes nuclear power equipment and the like related to the irradiation condition as main application objects, and realizes non-contact, unmanned, simple, safe, reliable and timely bonding interface state characterization through the steps of bonding interface sampling, typical state calibration, service field non-contact in-situ detection and the like.
2. Compared with a radiographic inspection method which adopts a radiographic tomography technology to research the bonding interface between the lining layer of the casting type solid engine and the grain and analyzes the difference of the states of the bonding interface before and after a freezing experiment and defect identification, the characterization method provided by the invention does not need to rely on other large-scale special equipment, and is convenient to implement.
3. Compared with the ultrasonic flaw detection which utilizes the ultrasonic flaw detection to research the non-ideal condition of the CuW/Cu (CrCu) joint surface of the contact of the reference block, the ultrasonic flaw detection does not need to be carried out by hands.
4. Compared with structural dynamics analysis of the correlation between the state of the bonding interface of the concrete material and the coarse aggregate and the transfer function of the concrete structure from the aspects of structural dynamics such as natural frequency, damping ratio and the like, the characterization method is simpler, and special research on the radiation tolerance of sensor arrays such as a displacement sensor or a strain sensor and the like adhered to the vicinity of the bonding interface and the adhesive for adhering the sensor arrays is not needed.
Detailed Description
The present invention will be further described with reference to the following examples.
An in-situ characterization method of a bonding interface state under an irradiation condition comprises the following steps:
1) adhesive interface sampling
According to the research conclusion of the irradiation failure mechanism, the degradation rule and the like of the target bonding interface, cutting and sampling are carried out on the typical state part of the irradiated real component bonding interface, the table certificate in the typical state is prepared by using the sampled product, other failure modes except the irradiation failure mechanism cannot be introduced in the sampling process, the number of the table certificate is recorded as n, the number of each table certificate is 1, 2 and … n, wherein n is more than or equal to 3, and preferably n is more than or equal to 5;
2) calibrating a typical state
2.1) Signal analysis based on laser-induced transient Grating Spectroscopy
Irradiating the surface certificate 1 prepared in the step 1) by using the laser-induced transient grating, obtaining a spectrogram of the surface certificate 1 by using spectral analysis equipment, carrying out non-contact pickup on characteristic signals in the spectrogram, marking characteristic signal data in a typical state as DI-1, and marking laser parameters used by the laser-induced transient grating as PaI;
2.2) defining failure classes
2.2.1) scanning and three-dimensional reconstruction of the bonding interface of the surface certificate 1 by adopting a micro-focus tomography device, carrying out state marking on the reconstructed bonding interface according to research conclusions such as a target bonding interface irradiation failure mechanism, a degradation rule and the like, and defining the failure grade as Da-1;
2.2.2) the same way as in step 2.1), step 2.2.1) is used to traverse the remaining table certificates, marking the typical state signature data as DI-i (i ═ 2, 3, … n), corresponding to the definition of a failure level Da-i (i ═ 2, 3, … n); (ii) a
2.2.3) fitting all failure levels Da-i and typical state characteristic signal data DI-i, and establishing a correlation mathematical model M;
3) non-contact in-situ detection of service site
3.1) laser-induced transient Grating Spectroscopy characterizing A target
After the laser induced transient grating is set by the laser parameter PaI marked in the step 2.1), the characterization target is irradiated, a spectrogram of the characterization target is obtained by using a spectrum analysis device, a characteristic signal in the spectrogram is picked up in a non-contact mode, and characteristic signal data is marked as DTest-1.
3.2) feature Signal processing
And (3) obtaining a failure grade representing a target by using the correlation mathematical model M obtained in the step 2.2.3) and taking the characteristic signal data DTest-1 as input.
The laser-induced transient grating and the spectral analysis equipment related to the steps belong to general technologies and equipment, and research conclusions such as target bonding interface irradiation failure mechanism, degradation rule and the like belong to the existing industry knowledge and are executed according to general technical specifications and technical requirements for representing targets.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same, and it is obvious for a person skilled in the art to modify the specific technical solutions described in the foregoing embodiments or to substitute part of the technical features, and these modifications or substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions protected by the present invention.
Claims (3)
1. An in-situ characterization method for a bonding interface state under an irradiation condition is characterized by comprising the following steps:
1) adhesive interface sampling
Cutting and sampling the typical state part of the irradiated real component bonding interface according to the irradiation failure mechanism and the degradation rule of the target bonding interface, preparing the table and certificate in the typical state by using the sampled product, recording the number of the table and certificate as n, numbering each piece as 1, 2 and … n, wherein n is more than or equal to 3;
2) calibrating a typical state
2.1) Signal analysis based on laser-induced transient Grating Spectroscopy
Irradiating the surface certificate 1 prepared in the step 1) by using the laser-induced transient grating, obtaining a spectrogram of the surface certificate 1 by using spectral analysis equipment, carrying out non-contact pickup on characteristic signals in the spectrogram, marking characteristic signal data in a typical state as DI-1, and marking laser parameters used by the laser-induced transient grating as PaI;
2.2) defining failure classes
2.2.1) scanning and three-dimensional reconstruction of the bonding interface of the surface certificate 1 by adopting a micro-focus tomography device, marking the reconstructed bonding interface with a state according to a target bonding interface irradiation failure mechanism and a degradation rule, and defining the failure grade as Da-1;
2.2.2) the same way as in step 2.1), step 2.2.1) is used to traverse the remaining table certificates, marking the typical state signature data as DI-i (i ═ 2, 3, … n), corresponding to the definition of a failure level Da-i (i ═ 2, 3, … n);
2.2.3) fitting all failure levels Da-i and typical state characteristic signal data DI-i, and establishing a correlation mathematical model M;
3) non-contact in-situ detection of service site
3.1) laser-induced transient Grating Spectroscopy characterizing A target
After the laser induced transient grating is set by the laser parameter PaI marked in the step 2.1), irradiating the characterization target, obtaining a spectrogram of the characterization target by using a spectrum analysis device, carrying out non-contact pickup on a characteristic signal in the spectrogram, and marking the characteristic signal data as DTest-1;
3.2) feature Signal processing
And (3) obtaining a failure grade representing a target by using the correlation mathematical model M obtained in the step 2.2.3) and taking the characteristic signal data DTest-1 as input.
2. The in-situ characterization method of the bonding interface state under irradiation condition according to claim 1, characterized in that: in the step 1), the irradiation failure mechanism is the only failure mode introduced in the sampling process.
3. The in-situ characterization method of the bonding interface state under irradiation condition according to claim 2, characterized in that: in the step 1), n is more than or equal to 5.
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| US20070109540A1 (en) * | 2003-04-16 | 2007-05-17 | Koninklijke Philips Electronics N.V. | Method for measuring thin films |
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