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Title: Direct metal writing: Controlling the rheology through microstructure

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.4977555· OSTI ID:1353155

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
Citation Metrics:
Cited by: 40 works
Citation information provided by
Web of Science

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Cited By (3)

Rheological Modification of Liquid Metal for Additive Manufacturing of Stretchable Electronics journal February 2018
One-step volumetric additive manufacturing of complex polymer structures journal December 2017
Toward digitally controlled catalyst architectures: Hierarchical nanoporous gold via 3D printing journal August 2018