High Pressure Torsioning of Cu-9Fe-1.2X(X = Co, Ni, Ag) Microcomposites and their Microstructural and Mechanical Evolution

Woo Min Choi; Sun Ig Hong

doi:10.4028/www.scientific.net/AMR.813.87

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 813High Pressure Torsioning of Cu-9Fe-1.2X(X = Co,...

High Pressure Torsioning of Cu-9Fe-1.2X(X = Co, Ni, Ag) Microcomposites and their Microstructural and Mechanical Evolution

Abstract:

In this study, strength of Cu-9Fe-1.2X (X 5 Ag or Cr) microcomposite disks obtained HPT(high pressure torsioning) have been investigated. The dendrite arms were aligned along the drawing direction and elongated into filaments. The filament spacings were found to small in Cu-9Fe-1.2Ag compared to those of other microcomposites. The ultimate tensile strength of the Cu-Fe-Ag microcomposites were higher than those of Cu-Fe-Co and Cu-Fe-Ni microcomposites, suggesting the strengthening of the matrix is more effective than the strengthening of the filaments in strengthening the microcomposites. The strength of Cu-Fe-Xi microcomposites increased more rapidly when the finer microstructure was developed by the plastic flow and refinement of filaments by the effect of strong Cu matrix strengthened by Ag atoms. With increase of strain up to 7 rotations, the second phase lamella was observed to be fragmented by HPT rotations and small second phase particles were observed.

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Periodical:

Advanced Materials Research (Volume 813)

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87-90

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https://doi.org/10.4028/www.scientific.net/AMR.813.87

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Online since:

September 2013

Authors:

Woo Min Choi, Sun Ig Hong

Keywords:

Cu-Fe-Co/Co-Fe-Ni/Co-Fe-Ag, High Pressure Torsion (HPT), Hybrid Alloy

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