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Title: Nanoindentation study of nanocrystalline nickel
Authors: Jayaganthan, R. 
Mohankumar, K.
Tay, A.A.O. 
Keywords: Mechanical behavior
Nanocrystalline nickel
Issue Date: Apr-2005
Citation: Jayaganthan, R., Mohankumar, K., Tay, A.A.O. (2005-04). Nanoindentation study of nanocrystalline nickel. International Journal of Nanoscience 4 (2) : 197-205. ScholarBank@NUS Repository.
Abstract: The mechanical properties of nanocrystalline (Nc) Ni (electrodeposited, sintered, rolled) and microcrystalline (Mc) Ni were investigated by nanoindentation technique. Force-displacement curves generated during loading and unloading of the nanoindenter tip (Berkovich diamond tip) were used to determine the hardness and elastic properties of the Nc-nickel. The influence of loading rate on the hardness of electrodeposited Nc-Ni and microcrystalline (Mc) Ni were studied in the present work. The electrodeposited Nc-nickel exhibits higher hardness and elastic modulus when compared to sintered Nc-nickel. The higher modulus of elasticity is observed for the rolled Nc-nickel due to the increased defect density and less porosity in the samples. The higher modulus of elasticity is observed for Mc-nickel when compared to that of Nc-nickel (electrodeposited) with varying load rate. The strain rate sensitivity of Nc-nickel is due to the grain boundary affected zone. © World Scientific Publishing Company.
Source Title: International Journal of Nanoscience
ISSN: 0219581X
DOI: 10.1142/S0219581X05003048
Appears in Collections:Staff Publications

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