13th International Conference on Fracture June 16–21, 2013, Beijing, China -4- temperature controlling system have been developed. By using such an unit, one can carry out the fatigue test within a temperature range of room temperature (RT) to 600deg.C. Accuracy of the temperature controlling is within 2deg.C. As fatigue test data are distinctly affected by the testing temperature, it is important to perform the fatigue tests at the accurate temperature. In such a case, this unit is useful to obtain the correct S-N property of the material at the definite temperature. Specification Temperature controlling range: room temperature to 600deg.C Size of control panel box: 170mm x 220mm x 280mm Specimen type : our standard specimen (φ10) Power: AC100V 1set Figure 5. High temperature environmental testing unit 3.2. Low temperature environmental testing unit A special unit to spray liquid nitrogen into the chamber has been developed to conduct the rotating bending fatigue test at low temperature environment. By using this unit, one can carry out the fatigue test within the temperature range of RT to -150deg.C with the accuracy of 2deg.C. Specification Temperature controlling range : -150 deg.C to room temperature Size of control panel box : 170mm x 220mm x 280mm Specimen type : our standard specimen (φ10) 3.3. Constant temperature/humid environmental testing unit A special unit to control the temperature and humidity inside the chamber has been developed to perform the rotating bending fatigue test under such a corrosive environment. In the case of corrosive environment, the control of temperature and humidity is the most important requirement to obtain reliable experimental data. Heat chamber
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