デジタル画像相関法によるき裂先端のクリープひずみ場の測定

抄録

Digital image correlation (DIC) method was applied to measure the creep strain field around the crack tip in a Ni-based single crystal superalloy. A DIC system was assembled to properly measure the creep strain field at 700°C and 900°C. The wavelength of light used for imaging and the air flow around the system were optimized to minimize the effects of heat haze and infrared radiation. The developed system could successfully measure the evolution of time-dependent creep strain field both at 700°C and 900 °C.