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

Figure 3

Acoustic pressure distribution of two types of annular array elements. (a) The element with equal width. (b) The element with equal area. (c) Axial acoustic field distribution. (d) Radial acoustic field distribution.

(a)

(b)

(c)

(d)