Table 1 Ultrasonic intensity

From: Non-contact ultrasound to assist laser additive manufacturing

 

Low-intensity ultrasound by non-contact-transmission mode

High-intensity ultrasound by contact-transmission mode

 

Am, μm

Im, W·cm−2

Am, μm

Im, W·cm−2

Minimum

0.01

2.4 × 10−3

3

212.4

Maximum

0.86

17.5

15

5320.2

  1. For Inconel 718 and stainless steel 316 L, the low-intensity ultrasound provided by the non-contact-transmission mode is below the melt cavitation threshold, while the high-intensity ultrasound provided by the contact-transmission mode is above the melt cavitation threshold.
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