Sample control method for testing residual stress of single crystal blade based on neutron diffraction

By using the sample control method of laser scanning arm and six-degree of freedom robot arm in neutron diffraction technology, the problem of test point position and test crystal plane orientation positioning of the special-shaped single crystal blade is solved, and the measurement of three-dimensional residual stress distribution inside the single crystal blade is realized, providing technical support for improving the integrity and yield of the single crystal blade.

CN119985568APending Publication Date: 2025-05-13CHINA INSTITUTE OF ATOMIC ENERGY
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Patent Information

Application Number
CN202510012168.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-03
Publication Date
2025-05-13

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Abstract

The invention discloses a sample control method for testing residual stress of a single crystal blade based on neutron diffraction, and relates to the technical field of material mechanics detection and control, the method comprises the following steps: S1, determining coordinates of a to-be-tested point of the single crystal blade and coordinates of a neutron diffraction center point through calibration of a laser scanning arm, according to the coordinate of the to-be-tested point and the coordinate of the neutron diffraction center point, controlling each axis of the six-degree-of-freedom mechanical arm to move, and moving the to-be-tested point of the single crystal blade to the neutron diffraction center point; s2, by adjusting the movement of each axis of the six-degree-of-freedom mechanical arm, enabling the single crystal blade to perform phi and psi rotation around a point to be tested by taking a diffraction vector as an axis, so as to realize crystal face orientation adjustment; and S3, according to the determined coordinates of the to-be-tested point of the single crystal blade and the spatial azimuth angle of each crystal face, realizing the residual stress test of the single crystal blade by using a neutron diffraction method. According to the method provided by the invention, the test point position and the test crystal face orientation positioning of the special-shaped single crystal blade can be accurately realized, so that the three-dimensional residual stress distribution in the special-shaped single crystal blade is obtained.
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Citation Information

Patent Citations

  • Neutron diffraction residual stress determination device and method

    CN102435623A

  • Single crystal stress measurement method based on monochromatic X ray diffraction

    CN110609047A

  • Method and device for measuring orientation and strain distribution by diffraction extinction imaging

    CN110618152A

  • Residual stress detection method and detection device thereof

    CN116878707A

  • Method and system for testing three-dimensional residual stress of single crystal metal material

    CN118464264A

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