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Microstructure Refinement of Cold-Sprayed Copper Investigated By Electron Channeling Contrast Imaging

Published online by Cambridge University Press:  24 June 2014

Yinyin Zhang ,
Nicolas Brodusch ,
Sylvie Descartes ,
Richard R. Chromik  and
Raynald Gauvin
Yinyin Zhang
Affiliation:
Department of Mining and Materials Engineering, McGill University, 3610 University Street, Montreal, Canada QC H3A 0C5
Nicolas Brodusch
Affiliation:
Department of Mining and Materials Engineering, McGill University, 3610 University Street, Montreal, Canada QC H3A 0C5
Sylvie Descartes
Affiliation:
Department of Mining and Materials Engineering, McGill University, 3610 University Street, Montreal, Canada QC H3A 0C5 Université de Lyon, CNRS, INSA-Lyon, LaMCoS, UMR5259, F-69621 Villeurbanne, France
Richard R. Chromik*
Affiliation:
Department of Mining and Materials Engineering, McGill University, 3610 University Street, Montreal, Canada QC H3A 0C5
Raynald Gauvin
Affiliation:
Department of Mining and Materials Engineering, McGill University, 3610 University Street, Montreal, Canada QC H3A 0C5
*
*Corresponding author. [email protected]
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Abstract

The electron channeling contrast imaging technique was used to investigate the microstructure of copper coatings fabricated by cold gas dynamic spray. The high velocity impact characteristics for cold spray led to the formation of many substructures, such as high density dislocation walls, dislocation cells, deformation twins, and ultrafine equiaxed subgrains/grains. A schematic model is proposed to explain structure refinement of Cu during cold spray, where an emphasis is placed on the role of dislocation configurations and twinning.

Keywords

cold sprayelectron channeling contrast imaginglow-energy dislocation structures (LEDS)high density dislocation walls (DDWs)cell structuresdeformation twinning
Type
Materials Applications
Information
Microscopy and Microanalysis , Volume 20 , Issue 5 , October 2014 , pp. 1499 - 1506
Copyright
© Microscopy Society of America 2014 

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