Imaging and Evaluation of Nano-Scale Crack by Using Ultrasonic Atomic Force Microscopy
| Periodical | Key Engineering Materials (Volumes 261 - 263) |
|---|---|
| Main Theme | Advances in Fracture and Failure Prevention |
| Edited by | Kikuo Kishimoto, Masanori Kikuchi, Tetsuo Shoji and Masumi Saka |
| Pages | 1067-1072 |
| DOI | 10.4028/www.scientific.net/KEM.261-263.1067 |
| Citation | Takashi Tsuji et al., 2004, Key Engineering Materials, 261-263, 1067 |
| Online since | April, 2004 |
| Authors | Takashi Tsuji, H. Irihama, T. Mihara, Kazushi Yamanaka |
| Keywords | Linear Vibration, Nanoscale Crack, Non-Destructive Evaluation (NDE), Nonlinear Vibration, Opening-and-Closing Behavior, Ultrasonic Atomic Force Microscopy |
| Price | US$ 28,- |
Evaluation method of nano-scale internal cracks by ultrasonic atomic force microscopy (UAFM) is proposed based on two approaches. The first one is a linear vibration analysis of the contact stiffness calculated from a finite element method analysis of a model including a subsurface gap. The second one is a nonlinear vibration analysis of a stiffening or softening spring representing the opening-and-closing behavior of the gap. These methods were verified by obtaining the resonance frequency mapping, the load dependence of the resonance frequency and the resonance spectra in UAFM on a subsurface gap in highly oriented pyrolytic graphite. As a result, it was proved that the proposed method is useful for evaluating the opening-and-closing behavior of the gap. Although the present study is focused on a nano-scale gap, this method is applicable to larger scale cracks using a larger tip and more stiff support than those used in AFM.
