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Published June 19, 2014 | Supplemental Material + Published
Journal Article Open

Developing Gradient Metal Alloys through Radial Deposition Additive Manufacturing

Abstract

Interest in additive manufacturing (AM) has dramatically expanded in the last several years, owing to the paradigm shift that the process provides over conventional manufacturing. Although the vast majority of recent work in AM has focused on three-dimensional printing in polymers, AM techniques for fabricating metal alloys have been available for more than a decade. Here, laser deposition (LD) is used to fabricate multifunctional metal alloys that have a strategically graded composition to alter their mechanical and physical properties. Using the technique in combination with rotational deposition enables fabrication of compositional gradients radially from the center of a sample. A roadmap for developing gradient alloys is presented that uses multi-component phase diagrams as maps for composition selection so as to avoid unwanted phases. Practical applications for the new technology are demonstrated in low-coefficient of thermal expansion radially graded metal inserts for carbon-fiber spacecraft panels.

Additional Information

© 2014 Macmillan Publishers Limited. This work is licensed under a Creative Commons Attribution-NonCommercial- NoDerivs 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder in order to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/4.0/ Received: 4 February 2014; Accepted: 27 May 2014; Published: 19 June 2014. This research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration (NASA) and funded through theOffice of the Chief Technologist. The authors acknowledge G. Agnes, C. Bradford, P. Gardner, C. Morandi, J. Mulder, P. Willis, and RPM for useful discussions. The authors cite no conflict of interest.

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Supplemental Material - srep05357-s1.doc

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