| CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
|
|
|
|
The Anomalous Temperature Effect on the Ductility of Nanocrystalline Cu Films Adhered to Flexible Substrates |
| HU Kun, CAO Zhen-Hua, WANG Lei, SHE Qian-Wei, MENG Xiang-Kang** |
Institute of Materials Engineering, National Laboratory of Solid State Microstructures and College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093
|
|
| Cite this article: |
|
HU Kun, CAO Zhen-Hua, WANG Lei et al 2013 Chin. Phys. Lett. 30 076201 |
|
|
|
|
Abstract The effect of temperature, T, on the ductility of nanocrystalline (NC) Cu films of different thicknesses on flexible substrates is studied by uniaxial tension. It is found that the NC Cu films will fracture more easily with increasing T, exhibiting the anomalous T effect compared with that of bulk NC metals and freestanding films. Moreover, the T dependence of ductility becomes stronger for thinner films due to the larger decrement of the interfacial strength in thinner films. T-induced softening of the stretchable substrate reduces the interface constraint ability for suppressing strain localization, leading to the anomalous T effect.
|
|
|
Received: 03 April 2013
Published: 21 November 2013
|
|
| PACS: |
62.40.+i
|
(Anelasticity, internal friction, stress relaxation, and mechanical resonances)
|
| |
62.20.fk
|
(Ductility, malleability)
|
| |
68.60.Bs
|
(Mechanical and acoustical properties)
|
| |
07.10.Lw
|
(Balance systems, tensile machines, etc.)
|
|
|
|
|
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
