Imaging and Evaluation of Nano-Scale Crack by Using Ultrasonic Atomic Force Microscopy

Takashi Tsuji; H. Irihama; T. Mihara; Kazushi Yamanaka

doi:10.4028/www.scientific.net/KEM.261-263.1067

Paper Titles

Early Detection of the Material Degradation Based on the Integrated Analysis of Diverse Measurement Techniques
p.1043

Information Integration System for Material Degradation in Severe Environment
p.1049

Fracture Simulation of Randomly Cracked Material with Various Crack Length Distributions
p.1055

Effect of Cerium and Silicon Additions to MCrAIY on the High-Temperature Oxidation Behavior and Bond Strength of Thermal Barrier Coatings
p.1061

Imaging and Evaluation of Nano-Scale Crack by Using Ultrasonic Atomic Force Microscopy
p.1067

Fatigue Property and Fatigue Crack Propagation Behavior of Al₂O₃/A6061 MMCs at Room and Elevated Temperature
p.1073

Fatigue Life Prediction of Impacted Glass/Epoxy Composites under Variable Amplitude Loading
p.1079

Control Effect on Fatigue Crack Propagation of TiNi Fiber Reinforced / Polycarbonate Composite Material
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Normal and Abnormal Fracture Behaviors in Low-Cycle Fatigue of a Unidirectionally Reinforced SCS-6/SP-700 Composite
p.1091

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Imaging and Evaluation of Nano-Scale Crack by Using Ultrasonic Atomic Force Microscopy

Abstract:

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.