Effects of twin and stacking faults on the deformation behaviors of Al nanowires under tension loading

doi:10.1088/1674-1056/21/10/106202

Abstract The effects of twin spacing and temperature on the deformation behavior of nanotwinned Al under tensile loading are investigated using a molecular dynamic (MD) simulation method. The result shows that the yield strength of nanotwinned Al decreases with the increase of twin spacing, which is related to the repulsive force between twin boundary and the dislocation. The result also shows that there is no strain-hardening at the yield point. On the contrary, the stress is raised by strain hardening in the plastic stage. In addition, we also investigate the effects of stacking fault thickness and temperature on the yield strength of the Al nanowire. The simulation results indicate that the stacking fault may strengthen the Al nanowire when the thickness of the stacking fault is below a critical value.

Keywords: molecular dynamic simulation deformation twin stacking fault

Received: 14 March 2012
Revised: 16 April 2012
Accepted manuscript online:

PACS:	62.25.-g	(Mechanical properties of nanoscale systems)
	61.46.-w	(Structure of nanoscale materials)
	64.70.Nd	(Structural transitions in nanoscale materials)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10902083) and the Program for New Scientific and Technological Star of Shaanxi Province, China (Grant No. 2012KJXX-39).

Corresponding Authors: An Min-Rong, Song Hai-Yang
E-mail: amr_lr@sohu.com; gsfshy@sohu.com

Cite this article:

An Min-Rong (安敏荣), Song Hai-Yang (宋海洋), Su Jin-Fang (苏锦芳) Effects of twin and stacking faults on the deformation behaviors of Al nanowires under tension loading 2012 Chin. Phys. B 21 106202

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Effects of twin and stacking faults on the deformation behaviors of Al nanowires under tension loading

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