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Mechanical annealing of Cu–Si nanowires during high-cycle fatigue

Published online by Cambridge University Press:  16 June 2014

Charlotte Ensslen ,
Oliver Kraft ,
Reiner Mönig ,
Jin Xu ,
Guang-Ping Zhang  and
Reinhard Schneider
Charlotte Ensslen
Affiliation:
Institute for Applied Materials, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
Oliver Kraft
Affiliation:
Institute for Applied Materials, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
Reiner Mönig*
Affiliation:
Institute for Applied Materials, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
Jin Xu
Affiliation:
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 110016 Shenyang, China
Guang-Ping Zhang
Affiliation:
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 110016 Shenyang, China
Reinhard Schneider
Affiliation:
Laboratorium für Elektronenmikroskopie, Karlsruhe Institute of Technology, 76128 Karlsruhe, Germany
*
Address all correspondence to Reiner Mönig at[email protected]
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Abstract

Monotonic and cyclic tension–tension tests with an upper stress in the GPa regime have been performed on Cu–Si nanowires. The results show that the exceptional high strength of these nanomaterials is maintained or even improved upon cyclic loading. Post-mortem transmission electron microscopy gives insight in the microstructural evolution. Fatigue-induced grain growth correlates with an observed increase in compliance, the formation of dislocation networks, and an increase in tensile strength.

Type
Research Letters
Information
MRS Communications , Volume 4 , Issue 3 , September 2014 , pp. 83 - 87
Copyright
Copyright © Materials Research Society 2014 

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