Scanning acoustic microscopy (SAM) technique was utilized for studying the mechanical properties of cold sprayed Fe coatings deposited on Al substrates with notches. For the samples fabrication, two different Al-based substrates were used: 10 mm thick cold-rolled Al 99.5% (EN AW1050A-H24) and 5 mm thick cold sprayed Al coating deposited from pure Al (20-50 µm, Toyal Europe, France, 99.99%). The difference between the two substrate types manufacturing routes was reflected in their different microstructure and different behavior upon deposition of the coating. Two types of notches were machined into the substrates, U-shaped (1 mm depth, 1 mm width) and trapezoid-shaped (1 mm depth, 1 mm width at the bottom, 3 mm width at the surface). Then, Fe coating (Nanoval, Germany) was applied using 5/11 high-pressure cold spray system (Impact Innovations, Germany). From each of these four types of samples, 0.5 mm thick plates were cut vertically across the notches. The SAM measurements were performed on the ~5x5 mm2 areas around the notches; at each measurement point, the ultrasonic wave (with 30 MHz nominal frequency) was focused on the top surface of the plate and the reflected signal was detected. By comparing the received echoes (the reflection on the top surface vs. the reflection on the bottom surface of the measured plates), the distributions of the wave velocity and the wave attenuation were obtained. It is shown that the ultrasonic waves in the cold sprayed Fe coatings are much more attenuated above the edges of the notches, i.e. the areas at which the coatings are not deposited perpendicularly on the substrates. Thus, the SAM measurements showed the reduced bonding quality of these areas above the notches when compared to the deposition on the flat substrates.