1715 原子力用鋼の低サイクル疲労試験中におけるAE発生挙動(OS17-4 低サイクル疲労とその応用-き裂進展評価・モニタリング-)

概要

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It is important to expand knowledge for low-cycle fatigue properties of pre-strained nuclear component materials and nondestructive inspection (NDI) techniques for fatigue damage detection when considering resumption of nuclear power plant subjected veiy large load which caused plastic deformation, such as seismic load. As acoustic emission (AE) monitoring can be applied during fatigue test and operation of plants, we conducted AE monitoring during low-cycle fatigue test of austenitic stainless steel. The AE monitoring results showed that reduction of fatigue life by applied high pre-strain was caused by shorten of fatigue crack initiation life. The result also showed that the possibility to use AE monitoring for fatigue damage detection of nuclear power plants.
2010-10-09