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Vibration aging process parameter determining method based on acoustic emission technique

An acoustic emission technology and vibration aging technology, which is applied in the field of determination of vibration aging process parameters based on acoustic emission technology, can solve problems such as dislocation movement at the microscopic scale, and achieve the effect of enriching the determination method and eliminating residual stress

Inactive Publication Date: 2019-01-04
SHANGHAI MARITIME UNIVERSITY
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Problems solved by technology

However, the above-mentioned method of determining the process parameters of the vibration aging technology does not take into account the dislocation movement at the microscopic scale, so the determined process parameters of the vibration aging technology must have deficiencies

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  • Vibration aging process parameter determining method based on acoustic emission technique

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Embodiment Construction

[0039] With reference to accompanying drawing, further illustrate the present invention:

[0040] A method for determining vibration aging process parameters based on acoustic emission technology includes the following steps:

[0041] (1), use the single factor test method to formulate the vibration aging experiment plan;

[0042] (2), test the initial residual stress of the component before the vibration aging treatment, then carry out the vibration aging treatment to the component, and take the Δt time as the interval, test the residual stress of the component after the vibration aging treatment;

[0043] (3) While performing vibration aging treatment on the component, the acoustic emission signal generated by the component during the cyclic vibration load is collected;

[0044] (4), analyze and process the acoustic emission signal, and take the Δt time as an interval to extract the characteristics of the acoustic emission signal;

[0045] (5), adopt data fitting software ...

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Abstract

The invention discloses a vibration aging process parameter determining method based on an acoustic emission technique. The method includes the steps: planning a vibration aging test scheme; testing initial residual stress and residual stress after vibration aging treatment of a component; acquiring acoustic emission signals generated under the action of a cyclic vibration load; analyzing the acoustic emission signals, and extracting characteristics of the acoustic emission signals; building quantization function expressions among the residual stress and the characteristics of the acoustic emission signals; acquiring the vibration aging process parameter determining method. According to the vibration aging process parameter determining method based on the acoustic emission technique, micro-scale dislocation serves as a base, vibration energy of outside action can be more effectively absorbed by the micro-scale dislocation when vibration aging is treated by the process parameters determined by a process parameter determining method, so that micro-scale dislocation movement is activated, and the residual stress can be effectively removed by vibration aging.

Description

technical field [0001] The invention relates to the field of vibration aging technology, in particular to a method for determining vibration aging process parameters based on acoustic emission technology. technical background [0002] Vibration aging technology has the characteristics of good treatment effect, short treatment time, less environmental pollution, low energy consumption, and easy on-site operation. technical possibilities. Therefore, research on vibration aging technology has important theoretical significance and engineering application value. [0003] To use vibration aging technology to eliminate the residual stress generated in the process of component manufacturing, first of all, it is necessary to determine the process parameters of vibration aging technology, and the determination of the process parameters of vibration aging technology is also one of the key research contents in the field of vibration aging technology. At present, when conducting vibra...

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Application Information

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IPC IPC(8): C21D10/00G01N29/14
CPCC21D10/00G01N29/14
Inventor 顾邦平严小兰徐全旺赖金涛胡雄
Owner SHANGHAI MARITIME UNIVERSITY