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New preparation method for artificial stress corrosion crack accordant with true crack shape

A stress corrosion cracking and real stress technology, applied in the field of artificial stress corrosion cracking preparation, can solve the problems of difficult preparation of artificial stress corrosion cracking test specimens, unknown electrical conductivity in the crack area, uncontrollable crack size, etc., achieving easy realization and processing cost. Low, easy-to-use effects

Inactive Publication Date: 2019-04-05
XI AN JIAOTONG UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the above-mentioned existing problems of difficult preparation of artificial stress corrosion crack test pieces, uncontrollable size of the prepared cracks and unknown electrical conductivity of the crack region, the purpose of the present invention is to provide a kind of artificial stress corrosion crack preparation consistent with the real crack shape The new method can reproduce a large number of stress corrosion cracks with known crack size and electrical conductivity. This method has the advantages of simple operation, easy implementation, low cost, and known simulated crack size and electrical conductivity. It can be widely used in stress corrosion cracking Quantitative non-destructive testing capability certification system

Method used

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  • New preparation method for artificial stress corrosion crack accordant with true crack shape
  • New preparation method for artificial stress corrosion crack accordant with true crack shape
  • New preparation method for artificial stress corrosion crack accordant with true crack shape

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Embodiment Construction

[0022] Such as figure 1 Shown is the flow chart of the present invention using 3D printing technology to prepare artificial stress corrosion cracks consistent with the shape of real cracks. Firstly, the real stress corrosion crack specimens are cut and processed, and the processed stress corrosion cracks are scanned and imaged in three dimensions by industrial CT. , to obtain the stress corrosion crack morphology map, and then use 3D printing technology to process and prepare artificial stress corrosion crack specimens consistent with the real crack morphology.

[0023] The following will combine figure 2 with image 3 The method of the present invention is further described in detail.

[0024] Step 1: Determination of real stress corrosion crack morphology, the specific steps are as follows:

[0025] 1) For example figure 2 The real stress corrosion crack test piece shown is machined, the part that does not contain cracks is removed, and the part that only contains stre...

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Abstract

The invention discloses a new preparation method for an artificial stress corrosion crack accordant with a true crack shape. In the method, firstly an industrial CT is used for scanning and imaging atrue stress corrosion crack test block, to acquire a stress corrosion crack shape graph; 3D print is directly performed to acquire an artificial stress corrosion crack accordant with the shape of thetrue stress corrosion crack by using the stress corrosion crack shape graph in combination with a 3D printing technology. A test piece prepared by using the method provided by the invention can repeatedly processes and prepares natural stress corrosion cracks in an actual structure, and has the advantages that the shapes of the cracks are accordant with that of the true crack, and the cracks can be prepared in large quantity; and method can be widely applied to a detectability certification system of a stress corrosion crack eddy current quantitative nondestructive detection method.

Description

technical field [0001] The invention relates to the field of preparation of stress corrosion crack simulation test pieces, in particular to a new method for preparing artificial stress corrosion cracks whose shape is consistent with real cracks. Background technique [0002] Austenitic stainless steel materials sensitive to stress corrosion are widely used in nuclear power plants, and the existence of tensile stress and corrosive environment in nuclear power structures makes stress corrosion cracks widely exist in key parts of nuclear power plants, such as furnace core compartments, recirculation pipes and Welding parts of the main cooling pipe, etc. The existence of stress corrosion cracks poses a huge threat to the safe operation of nuclear power structures. In addition, considering economic benefits, it is necessary to evaluate the size of cracks. Therefore, quantitative nondestructive testing of stress corrosion cracks is extremely important. At present, the testing abi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/046G01N17/00G01N1/28
CPCG01N1/28G01N17/006G01N23/046G01N2291/0234G01N2291/0289
Inventor 蔡文路陈振茂邱金星李萌姜北燕马建国
Owner XI AN JIAOTONG UNIV
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