Title

Laser Metal Deposition of Functionally Gradient Materials from Elemental Copper and Nickel Powders

Abstract

This work deals with the planning and fabrication of a functionally gradient copper-nickel composition via Laser Metal Deposition (LMD). Various compositions of copper and nickel were made by blending different weight percentages which were then sequentially deposited to fabricate functionally gradient copper-nickel thin-wall structures. Analyses were performed by sectioning the thin-wall samples for metallographic, hardness, X-ray diffraction (XRD) and Energy Dispersive X-ray Spectroscopy (EDS) studies. The fabrication was studied for identifying and corroborating the deposited compositions and their corresponding gradients. XRD analyses were performed to identify the crystal structure of the deposit. EDS analysis was instrumental in identifying the variation in composition and realizing the gradient in between compositions. Consequences of using different laser beam intensity profiles and varying laser power duty cycles were realized by analyzing the copper-nickel concentration trends obtained from EDS analyses. Hardness testing was successful in capturing the decreasing trends in strength with decreasing nickel concentration.

Meeting Name

26th Annual International Solid FreeForm Fabrication Symposium (2015: Aug. 10-12, Austin, TX)

Department(s)

Mechanical and Aerospace Engineering

Second Department

Materials Science and Engineering

Sponsor(s)

National Aeronautics and Space Administration (NASA)

Comments

The authors would like to express their sincere gratitude to the support from National Aeronautics and Space Administration EPSCoR program (Grant# NNX13AM99A), and Intelligent Systems Center at Missouri University of Science and Technology.

International Standard Serial Number (ISSN)

1053-2153

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2015 University of Texas at Austin -- Laboratory for Freeform Fabrication (LFF), All rights reserved.

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