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Using Synchrotron Radiation Microtomography to Investigate Multi-scale Three-dimensional Microelectronic Packages
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Phased Array Imaging of Complex-Geometry Composite Components.

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    Ultrasonic phased array (PA) technology combined with immersion testing offers a robust solution for inspecting complex aerospace components. This advanced method effectively detects defects like porosity and waviness in composite materials.

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    Area of Science:

    • Aerospace Engineering
    • Materials Science
    • Nondestructive Evaluation

    Background:

    • Aerospace engine components feature complex geometries and advanced composite materials, challenging traditional inspection methods.
    • Increasing surface curvature and intricate microstructures reduce the sensitivity and selectivity of conventional nondestructive evaluation (NDE).
    • Existing immersion testing methods face limitations due to signal interpretation complexities arising from water-component interface reflections and refractions.

    Purpose of the Study:

    • To present a general approach for enhanced nondestructive evaluation of complex aerospace components.
    • To overcome the limitations of traditional NDE methods in inspecting intricate geometries and microstructures.
    • To demonstrate the effectiveness of ultrasonic phased array (PA) technology in immersion testing for aerospace applications.

    Main Methods:

    • Combining ultrasonic phased array (PA) technology with immersion testing for continuous scanning and volumetric rendering.
    • Utilizing advanced computing for rapid ray tracing in anisotropic media with a 256-channel parallel array architecture.
    • Employing both reflected and transmitted signals through the component using arrays in a yoke configuration for full-volume inspection.

    Main Results:

    • The developed approach successfully accounts for refraction at the water-component interface by reconstructing interface geometry.
    • The method overcomes dead zone limitations, improving sensitivity to shallow subsurface defects.
    • Experimental results demonstrate the robust detection of defects such as porosity and waviness in complex composite specimens, including fan blades.

    Conclusions:

    • Ultrasonic phased array (PA) technology in an immersion configuration provides a viable and effective solution for inspecting complex aerospace components.
    • The combination of advanced computing and PA technology enables comprehensive, full-volume inspection of parts with challenging geometries and materials.
    • This approach significantly enhances the capability to detect critical defects in composite aerospace structures.