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4 months ago in Additive Manufacturing , Advanced Manufacturing By Pragati
Which universities and companies are actively researching Ultrasonic Additive Manufacturing (UAM)?
My builds look solid on the outside, but cross-sections sometimes reveal voids or unbonded regions. I need to move beyond trial-and-error parameter tuning. I want to understand what's happening at the foil-foil interface is it primarily plastic deformation, adiabatic heating, or something else? Also, are there non-destructive techniques that correlate with bond strength?
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By Anusha Answered 1 month ago
Key academic research in UAM is led by The Ohio State University, University of Nebraska–Lincoln, and University of Strathclyde. On the industry side, Fabrisonic LLC is the main commercial provider of UAM systems, with Sonicu (originating from the University of Nebraska) also contributing. These groups focus on solid-state bonding, embedded sensors, and metal matrix composites using ultrasonic vibrations.
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By Keerthi Gupta Answered 1 month ago
From my experience with UAM process development, the bonding is dominated by severe plastic deformation at the interface, which fractures and disperses surface oxides, allowing intimate metal-metal contact. Adiabatic heating softens the material but we are not melting. To assess bond quality, I recommend a combination: ultrasonic C-scan for immediate, qualitative detection of gross voids, followed by selective metallography and microscale hardness mapping across interfaces. A true metallurgical bond will show grain continuity across the original interface after etching, whereas mechanical interlocking will retain a visible seam.
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