Variable Aperture Method of Ultrasonic Annular Array for the Detection of Addictive Manufacturing Titanium Alloy

Figure 11

Echo signal of the defects using annular array. (a, c, e) Echo signals of defect-1, defect-2, and defect-3 using the fixed aperture method, respectively. (b, d, f) Echo signals of defect-1, defect-2, and defect-3 using the variable aperture method, respectively.

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