Effect of Pile-Up on Nanoindentation Measurements of Polycrystalline Bulk Metals

Abstract:

This paper presents the results of an experimental investigation on the effects of orientation and grain size on nanoindentation measurements of hardness and modulus of elasticity for three polycrystalline metals: copper, nickel, and iron. Three geometrically different indenter tips were used, and the pile-ups were characterized with a surface probe instrument. The electron backscatter diffraction (EBSD) technique and a scanning electron microscope (SEM) were used to characterize grain orientation and microstructure. It was found that additional contact areas due to pile-ups have a significant effect on determination of mechanical properties by the nanoindenter.

• Periodical: Advanced Materials Research (Volume 853)
• Pages: 143-150
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.853.143
• Online since: December 2013
• Authors: Reza A. Mirshams*, Ashish K. Srivastava
• Keywords: Copper, Elasticity, Hardness, Iron, Nanoindentation, Nickel, Pile-Up

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