Abstract
Fatigue limit estimation based on the dissipated energy measurement using infrared thermography has been getting an attention in various industries. In this study, phase information of temperature change due to energy dissipation was used for accuracy improvement of dissipated energy measurement which is called phase lock-in method. Fatigue limit estimation using phase lock-in method for dissipated energy measurement was conducted for pre-strained JIS type 316L austenitic steel specimen. It is found that the increasing rate of dissipated energy near fatigue limit for pre-strained specimen is smaller than that for as-received specimen. The estimated value of fatigue limit obtained from new estimation scheme coincides with that obtained from conventional fatigue test.
