Authors: Hu Huang, Hongwei Zhao, Chengli Shi and Lin Zhang
University/Institute: College of Mechanical Science & Engineering, Jilin University
Abstracts: The tilt between the indenter and the sample surface will affect measuring results and accuracy of nanoindentation and scratch. In this paper, the potential factors leading to the tilt were firstly discussed. Then, based on the Cartesian coordinate system at the tip of the triangular pyramid indenter established by Kashani and Madhavan, a theoretical approach is proposed to measure the tilt angle η and the rotation angle ζ of the surface normal using the residual indent morphology. In order to reduce input parameters for solving the equations and also make the equations dimensionless, two coefficients m and n are defined. One practical application is given to verify the feasibility of the theoretical approach. The theoretical approach is simplified and unified by analyzing the calculation results. The presented theoretical approach can be used to measure the tilt between the indenter and the sample surface indirectly, which is the premise for adjustment of indentation instruments or the practical correction of the tilt.
Links to the paper (link to the journal webpage): http://iopscience.iop.org/0957-0233/24/10/105602/