Indentation-induced pop-in phenomena of single crystal aluminum:experiment and simulation approaches
碩士 === 國立成功大學 === 材料科學及工程學系碩博士班 === 97 === With the manufacturing process of nanodevices moving forward rapidly, the material mechanical properties have play an important role owing to the decreasing of device dimension in nanoscale. By using the nanoindentor (MTS XP) we can acquire the circumstanti...
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| Format: | Others |
| Language: | en_US |
| Published: |
2009
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| Online Access: | http://ndltd.ncl.edu.tw/handle/68666450044230652318 |
| Summary: | 碩士 === 國立成功大學 === 材料科學及工程學系碩博士班 === 97 === With the manufacturing process of nanodevices moving forward rapidly, the material mechanical properties have play an important role owing to the decreasing of device dimension in nanoscale. By using the nanoindentor (MTS XP) we can acquire the circumstantial mechanical data with a fast and reliable method. The pre-existing threading dislocation in material might be induced by indentation allowing the discontinuousness in the load-displacement curve and can be observed in gradation of the affected region. In this paper, we pay attention to the phenomena called “pop-in” during indentation and the relation to the beginning of slip system operation.
The experiments are operated by the electron back-scatter diffraction (EBSD) to obtain the orientation imaging microscopy (OIM) of specimen. The simulation processes are performed by crystal plasticity finite element method which differs from other method by the extra subroutine taking the slip plane of face-centered cubic metal into account.
Combine the experimental results and the simulation analysts to assure the accuracy of the behavior and further quantize the stress and strain distribution in the vicinity of affected zone.
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