S0301-1-2 マイクロ波によるNi基合金溶接部表面の応力腐食割れの計測・評価([S0301-1]欠陥の診断および治癒)

概要

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In this paper, we report results of measuring stress corrosion cracking (SCC) and evaluating its depth on the surface of Ni-base alloys, utilizing microwaves. An open-ended coaxial line sensor was used to increase the spatial resolution. The working frequency was 110 GHz and the standoff distance between the sensor and the sample was 60 μm. The distribution of SCC was obtained by microwave imaging. By measuring the amplitude of reflection coefficient, detection of SCC was achieved and V-shaped and W-shaped characteristic signal was obtained. The equation to evaluate SCC depth was proposed. Consequently, the distribution of SCC depth along the crack length was evaluated using the measured amplitude difference.
一般社団法人日本機械学会の論文
2010-09-04