Microstructural Refinement within a Cold-Sprayed Copper Particle

The supersonic impact of a copper microparticle onto a Cu 11000 surface was investigated. The particle was dissected and imaged using a focussed ion beam/scanning electron microscope (FIB/SEM). This was compared with transmission electron microscopy (TEM) of a thick cold spray deposit of copper. Sig...

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Bibliographic Details
Published in:Metallurgical and materials transactions. A, Physical metallurgy and materials science Physical metallurgy and materials science, 2009-09, Vol.40 (9), p.2115-2123
Main Authors: King, Peter C., Zahiri, Saden H., Jahedi, Mahnaz
Format: Article
Language:English
Subjects:
Applied sciences
Atoms & subatomic particles
Characterization and Evaluation of Materials
Chemistry and Materials Science
Cold
Exact sciences and technology
Grain boundaries
Materials Science
Metallic Materials
Metallurgy
Metals. Metallurgy
Nanotechnology
Shear stress
Structural Materials
Surfaces and Interfaces
Thin Films
Wear resistance
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Summary:The supersonic impact of a copper microparticle onto a Cu 11000 surface was investigated. The particle was dissected and imaged using a focussed ion beam/scanning electron microscope (FIB/SEM). This was compared with transmission electron microscopy (TEM) of a thick cold spray deposit of copper. Significant refinement occurred in both cases due to severe plastic deformation (SPD) at high strain rates. In the single-particle case, this was much more pronounced in the highly deformed region, closer to the particle-substrate interface. In the bulk deposit, a highly nonhomogeneous microstructure resulted. The appearance of nanosized grains and microtwins was an indication of the large strains imposed during impact.
ISSN:1073-5623
1543-1940
DOI:10.1007/s11661-009-9882-5