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.
Official URL: http://www.nanoscalereslett.com/content/6/1/186
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.
|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
|Deposited On:||16 Jul 2011 07:26|
|Last Modified:||16 Jul 2011 07:26|
Repository Staff Only: item control page