The measurements of nanomechanics have been established to study the effects of strain burst and pile-up on the hardness and elastic modulus of single crystal copper samples. For nanoindentation of the single crystal copper subjected to various loadings, the residual depths have been analyzed and compared with the cross sectional depth profile obtained by the atomic force microscope (AFM). A penetration depth around 5 to 8 nm is observed before the strain burst. It is found that the critical load to cause the first burst slightly decreases with increasing loading rate. A new graphical method based on the 3-D image of indent was proposed to eliminate the hardness and elastic modulus errors induced by the pile-up effect. The hardness and elastic modulus are not influenced by the value of maximum load and reduced to around 95% of their direct measurement values based on the Oliver-Pharr method. In comparison, the hardness decreases with increasing maximum load and shows strong dependence with the maximum load applied when the work of indentation method was employed.
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STLE/ASME 2006 International Joint Tribology Conference
October 23–25, 2006
San Antonio, Texas, USA
Conference Sponsors:
- Tribology Division
ISBN:
0-7918-4259-2
PROCEEDINGS PAPER
The Phenomenon of Strain Burst and Pile-Up in Nanoindentation of the Single Crystal Copper
Jyh-Wei Lee,
Jyh-Wei Lee
Chung Yuan Christian University, Chung Li, Taiwan
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Chao-Sheng Lee,
Chao-Sheng Lee
Chung Yuan Christian University, Chung Li, Taiwan
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Min-Chou Chen,
Min-Chou Chen
Tung Nan Institute of Technology, Taipei, Taiwan
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Jen-Ching Huang,
Jen-Ching Huang
Tung Nan Institute of Technology, Taipei, Taiwan
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Yuan Kang
Yuan Kang
Chung Yuan Christian University, Chung Li, Taiwan
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Jyh-Wei Lee
Chung Yuan Christian University, Chung Li, Taiwan
Chao-Sheng Lee
Chung Yuan Christian University, Chung Li, Taiwan
Min-Chou Chen
Tung Nan Institute of Technology, Taipei, Taiwan
Jen-Ching Huang
Tung Nan Institute of Technology, Taipei, Taiwan
Yuan Kang
Chung Yuan Christian University, Chung Li, Taiwan
Paper No:
IJTC2006-12272, pp. 1385-1389; 5 pages
Published Online:
October 2, 2008
Citation
Lee, J, Lee, C, Chen, M, Huang, J, & Kang, Y. "The Phenomenon of Strain Burst and Pile-Up in Nanoindentation of the Single Crystal Copper." Proceedings of the STLE/ASME 2006 International Joint Tribology Conference. Part B: Magnetic Storage Tribology; Manufacturing/Metalworking Tribology; Nanotribology; Engineered Surfaces; Biotribology; Emerging Technologies; Special Symposia on Contact Mechanics; Special Symposium on Nanotribology. San Antonio, Texas, USA. October 23–25, 2006. pp. 1385-1389. ASME. https://doi.org/10.1115/IJTC2006-12272
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