Direct metal writing: Controlling the rheology through microstructure
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Worcester Polytechnic Institute, Worcester, MA (United States)
Most metal additive manufacturing approaches are based on powder-bed melting techniques such as laser selective melting or electron beam melting, which often yield uncontrolled microstructures with defects (e.g., pores or microcracks) and residual stresses. Here, we introduce a proof-of-concept prototype of a 3D metal freeform fabrication process by direct writing of metallic alloys in the semi-solid regime. This process is achieved through controlling the particular microstructure and the rheological behavior of semi-solid alloy slurries, which demonstrate a well suited viscosity and a shear thinning property to retain the shape upon printing. Furthermore, the ability to control the microstructure through this method yields a flexible manufacturing route to fabricating 3D metal parts with full density and complex geometries.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC52-07NA27344; Laboratory Directed Research and Development 14-SI-004
- OSTI ID:
- 1353155
- Alternate ID(s):
- OSTI ID: 1349372
- Report Number(s):
- LLNL-JRNL-716017
- Journal Information:
- Applied Physics Letters, Vol. 110, Issue 9; ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Rheological Modification of Liquid Metal for Additive Manufacturing of Stretchable Electronics
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journal | February 2018 |
One-step volumetric additive manufacturing of complex polymer structures
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journal | December 2017 |
Toward digitally controlled catalyst architectures: Hierarchical nanoporous gold via 3D printing
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journal | August 2018 |
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