What does this research mean for the field?

A signal processing method combining time-truncation principal component analysis, targeted noise reduction, and the Synthetic Aperture Focusing Technique enables the detection of internal microdefects as small as 90 μm in LPBF-fabricated Ti6Al4V with anisotropic microstructures. Novelty: ClaimNovelty.METHODOLOGICAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

Investigate laser ultrasonic testing and signal enhancement algorithms for detecting sub-100-micrometer internal defects in additively manufactured Ti6Al4V with anisotropic microstructures.

August 30, 2026MicromachinesOpen Access

Laser Ultrasonic Detection and Signal Enhancement of Internal Microdefects in LPBF Ti6Al4V with Anisotropic Microstructure: Simulations and Experiments

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Investigate laser ultrasonic testing and signal enhancement algorithms for detecting sub-100-micrometer internal defects in additively manufactured Ti6Al4V with anisotropic microstructures.
Developed a finite element model coupling Voronoi algorithm-generated polycrystalline geometries with orientation-dependent elastic tensors to simulate acoustic anisotropy.
Conducted experimental testing on laser powder bed fusion (LPBF) Ti6Al4V specimens using a non-contact laser ultrasonic inspection system.
Implemented a post-processing workflow combining time-truncation principal component analysis (PCA), targeted noise filtering, and the Synthetic Aperture Focusing Technique (SAFT).
Simulations demonstrated that sub-100-μm microdefects yield weak ultrasonic scattering that is significantly enhanced for detection and imaging using SAFT.
Baseline experimental laser ultrasonics successfully resolved a 90 μm internal defect in LPBF Ti6Al4V, whereas a 75 μm defect remained undetected.
Combining time-truncation PCA with targeted filtering and SAFT suppressed high-frequency structural noise, improving imaging resolution and defect detection sensitivity.

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Implication

Simulation and experimental study demonstrates enhanced ultrasonic microdefect detection in additively manufactured Ti6Al4V, indicating improved quality control for metal 3D printing.

Cite This Study

Zhou et al. (2026) studied this question.

synapsesocial.com/papers/6a93f0b06c1a8fb52e79d012 https://doi.org/10.3390/mi17091025

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Implication

Simulation and experimental study demonstrates enhanced ultrasonic microdefect detection in additively manufactured Ti6Al4V, indicating improved quality control for metal 3D printing.

Laser Ultrasonic Detection and Signal Enhancement of Internal Microdefects in LPBF Ti6Al4V with Anisotropic Microstructure: Simulations and Experiments

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Discussion

Implication

Cite This Study

Laser Ultrasonic Detection and Signal Enhancement of Internal Microdefects in LPBF Ti6Al4V with Anisotropic Microstructure: Simulations and Experiments

Key Points

Discussion

Implication

Cite This Study

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