Metal Industries Research & Development Centre

Zong-Rong Liu

Hsiu-An Tsai

A method for measuring a residual stress of a curved-surface bulk material includes steps of: locating a point at which a to-be-detected curved surface of a curved-surface bulk material has a highest curvature as a to-be-detected point; applying an instrument integrating an X-ray light resource and a detector, measuring the to-be-detected point by using an X-ray diffraction theory, and analyzing and calculating, in combination with a cos &#x3b1; method, a strain value measured by using the instrument; and calculating, in combination with material property measurement data of the curved-surface bulk material, a curved-surface residual stress by introducing a curved-surface bulk material residual stress calculation model.

Method for measuring residual stress of curved-surface bulk material

A residual stress detection device for a curved surface coating and a detection method thereof is provided, where its structure includes: a detection piece carrier, configured to fix the detection piece, so that a to-be-detected point on the detection piece remains at a highest point; an X-ray generation source, radiating an X-ray to the to-be-detected point fixedly or along a path; a detection element, including a moving mechanism, where the moving mechanism moves the detection element along a path extending toward a direction orthogonal to an incident direction of the X-ray, so that the detection element receives and detects intensity of a diffraction X-ray at a position of the diffraction X-ray; and a stress calculation module, obtaining a strain value based on an intensity peak of the diffraction X-ray detected by the detection element, and calculating a residual stress value of the detection piece by using a formula.

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Kaohsiung, Taiwan

Zong-Rong Liu