Some Material Characteristics of Cold-Sprayed Structures

Champagne, Victor K.; Helfritch, Dennis J.; Trexler, Matthew D.

doi:https://doi.org/10.1155/2007/27347

Advances in Materials Science and Engineering

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Research Letter | Open Access

Volume 2007 | Article ID 027347 | https://doi.org/10.1155/2007/27347

Some Material Characteristics of Cold-Sprayed Structures

Victor K. Champagne,¹Dennis J. Helfritch,¹and Matthew D. Trexler¹

Academic Editor: Jenn-Ming Yang

Received30 Jul 2007

Accepted05 Nov 2007

Published22 Nov 2007

Abstract

The deposition and consolidation of metal powders by means of cold spray are methods whereby powder particles are accelerated to high velocity through entrainment in a gas undergoing expansion in a rocket nozzle and are subsequently impacted upon a surface. The impacted powder particles form a consolidated structure which can be several centimeters thick. The characteristics of this structure depend on the initial characteristics of the metal powder and upon impact velocity. The influence of impact velocity on strain hardening and porosity are examined. A materials model is proposed for these phenomena, and model calculation is compared with experiment for the cold spraying of aluminum.

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Copyright

Copyright © 2007 Victor K. Champagne et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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