This is not the latest version of this item. The latest version can be found here.
Ultrasonic additive manufacturing of nanocrystalline laminated composites
Name
43578_2021_Article_462.pdf
Size
2.19 MB
Format
Adobe PDF
Checksum (MD5)
e1d08a4023b114aba35de2332757206a
Author(s)
Ward, Austin A.
Leonard, Donovan N.
König, Hans-Henrik
Lindwall, Greta
Cordero, Zachary C.
Date Issued
January 8, 2022
Publisher
Springer International Publishing
Citation
Ward, Austin A., Leonard, Donovan N., König, Hans-Henrik, Lindwall, Greta and Cordero, Zachary C. 2022. "Ultrasonic additive manufacturing of nanocrystalline laminated composites."
Version
Final published version
Abstract
Abstract
Ultrasonic additive manufacturing has been used to fabricate laminated composites of commercially pure aluminum and a nanocrystalline nickel–cobalt (nc-NiCo) alloy. The nc-NiCo alloy would not weld to itself but readily welded to aluminum. Thus, by alternating between foils of nc-NiCo and Al, we achieved multi-material laminates with strong interlayer bonding. Electron microscopy showed that the nanoscale grain structure of the nc-NiCo was preserved during deposition and that the nc-NiCo/Al weld interface was decorated with comminuted surface oxides as well as Al–Ni–Co intermetallics. These findings are considered in light of process models of junction growth, interdiffusion, and grain growth, which together reveal how the different pressure- and temperature dependences of these phenomena give rise to a range of processing conditions that maximize bonding while minimizing coarsening and intermetallic formation. This analysis quantitatively demonstrates that using a soft, low melting point interlayer material decouples junction growth at the weld interface from grain growth in the nc-NiCo, expanding the range of optimal processing conditions.
Graphical abstract
Terms of Use
Creative Commons Attribution
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1557/s43578-021-00462-5
