Nano Archive

The rate sensitivity and plastic deformation of nanocrystalline tantalum films at nanoscale

Cao, Zhenhua and She, Qianwei and Huang, Yongli and Meng, Xiangkang (2011) The rate sensitivity and plastic deformation of nanocrystalline tantalum films at nanoscale. Nanoscale Research Letters, 6 (1). pp. 1-6.

[img]
Preview
PDF
728Kb

Official URL: http://www.nanoscalereslett.com/content/6/1/186

Abstract

Nanoindentation creep and loading rate change tests were employed to examine the rate sensitivity (m) and hardness of nanocrystalline tetragonal Ta films. Experimental results suggested that the m increased with the decrease of feature scale, such as grain size and indent depth. The magnitude of m is much less than the corresponding grain boundary (GB) sliding deformation with m of 0.5. Hardness softening behavior was observed for smaller grain size, which supports the GB sliding mechanism. The rate-controlling deformation was interpreted by the GB-mediated processes involving atomic diffusion and the generation of dislocation at GB.

Item Type:Article
Subjects:Physical Science > Nanophysics
Physical Science > Nano objects
Material Science > Nanochemistry
Material Science > Nanostructured materials
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:10959
Deposited By:JNCASR
Deposited On:16 Jul 2011 07:26
Last Modified:16 Jul 2011 07:26

Repository Staff Only: item control page