Mechanical Behavior of Nanometer Ni by Simulating Nanoindentation
TANG Qi-Heng1,2, YANG Tian-Yong1, DING Lan3
1State Key Laboratory of Nonliear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 1001902State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 1000803The School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083
Mechanical Behavior of Nanometer Ni by Simulating Nanoindentation
TANG Qi-Heng1,2, YANG Tian-Yong1, DING Lan3
1State Key Laboratory of Nonliear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 1001902State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 1000803The School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083
摘要An indentation simulation of the crystal Ni is carried out by a molecular dynamics technique (MD) to study the mechanical behavior at nanometer scales. Indenter tips with both sphere shape and conical shape with 60° cone angle are used, and simulation samples with different crystal orientations are adopted. Some defects such as dislocations and point defects are observed. It is found that nucleated defects (dislocations, amorphous atoms) are from the local region near the pin tip or the sample surface. The temperature distribution of the local region is analyzed and it can explain our MD simulation results.
Abstract：An indentation simulation of the crystal Ni is carried out by a molecular dynamics technique (MD) to study the mechanical behavior at nanometer scales. Indenter tips with both sphere shape and conical shape with 60° cone angle are used, and simulation samples with different crystal orientations are adopted. Some defects such as dislocations and point defects are observed. It is found that nucleated defects (dislocations, amorphous atoms) are from the local region near the pin tip or the sample surface. The temperature distribution of the local region is analyzed and it can explain our MD simulation results.
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2010, Vol. 27 
