日本語フィールド
著者：Md. T. I. Khan, T. Nagao, S. Kitamura, N. Hattori題名：
Damage Characterization of Ductile Iron by Acoustic Emission Technique発表情報：The 21st International Congress on Sound and Vibration (ICSV21), Beijing ページ: 1-6キーワード：AE technique, Non-destructive evaluation, Pearlite Ductile cast iron, Damage evaluation.概要：抄録：Damage characteristics of pearlite ductile cast iron due to crack, micro-crack have been inves-tigated by acoustic emission (AE) technique. As pearlite type spheroidal graphite cast iron has high strength as well as excellent workability and damping capacity, it has been widely used as automobile and many other machine parts. However, the damage initiation and propagation of this type of spheroidal graphite cast iron might depend not only on the graphite size but al-so on the distribution of the graphite nodules. Therefore, the cracks are initiated from the larger or coarser graphite nodules. In this study, the failures of pearlite ductile cast iron caused by cracks and micro-cracks have been investigated sequentially by AE technique as a non-destructive evaluation (NDE) tool. AE events during the initiation of cracks and micro-cracks have been taken and characterized by analyzing AE parameters. The results are compared by the microstructural analysis as well. The damage characteristics have been evaluated by ana-lyzing AE parameters with appropriate thresholds for avoiding noises. These AE data along with high resolution microstructural images have revealed the evolving and propagating be-haviors of damages under fatigue loading condition with appropriate pulse-cycles. Remarka-ble results have been achieved in the present AE technique of damage evaluation.英語フィールド
Author：Md. T. I. Khan, T. Nagao, S. Kitamura, N. HattoriTitle：
Damage Characterization of Ductile Iron by Acoustic Emission TechniqueAnnouncement information:The 21st International Congress on Sound and Vibration (ICSV21), Beijing Page: 1-6Keyword：AE technique, Non-destructive evaluation, Pearlite Ductile cast iron, Damage evaluation.An abstract：Damage characteristics of pearlite ductile cast iron due to crack, micro-crack have been inves-tigated by acoustic emission (AE) technique. As pearlite type spheroidal graphite cast iron has high strength as well as excellent workability and damping capacity, it has been widely used as automobile and many other machine parts. However, the damage initiation and propagation of this type of spheroidal graphite cast iron might depend not only on the graphite size but al-so on the distribution of the graphite nodules. Therefore, the cracks are initiated from the larger or coarser graphite nodules. In this study, the failures of pearlite ductile cast iron caused by cracks and micro-cracks have been investigated sequentially by AE technique as a non-destructive evaluation (NDE) tool. AE events during the initiation of cracks and micro-cracks have been taken and characterized by analyzing AE parameters. The results are compared by the microstructural analysis as well. The damage characteristics have been evaluated by ana-lyzing AE parameters with appropriate thresholds for avoiding noises. These AE data along with high resolution microstructural images have revealed the evolving and propagating be-haviors of damages under fatigue loading condition with appropriate pulse-cycles. Remarka-ble results have been achieved in the present AE technique of damage evaluation.