Experimental Method of High��speed Determination ofFatigue Limit for 45 Steel
LIU Hao1,ZHAO Jun2,DING Hua3
1.School of Applied Science, Taiyuan University of Science and Technology, Taiyuan 030024, Shanxi, China; 2.College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China;3.Institute of Mechanics, Chinese Academy of Science, Beijing 100080, China
Abstract��The materials�� fatigue process is one of energy dissipation, which is presented as the heat dissipation on the macroscopy. The energy theory which is applied in the study of materials�� fatigue behavior is a bridge between micro��mechanism and macro��phenomenon. In this paper, the infrared thermal sensor is utilized to study the temperature changes during the fatigue test of the 45# steel specimen with necking part, and the mechanism of temperature change has been discussed, and a new method to determine the fatigue limit of 45# steel fast is introduced. The experiment indicates that the result of 45# steel��s fatigue limit from infrared thermography technique is reasonable, and this method has such merits as non��contact, convenience and low��cost.
����;�Ծ�;����. ����ȷ��45��ƣ�ͼ������鷽��[J]. �й������ڿ���, 2008, 26(2): 38-0.
LIU Hao;ZHAO Jun;DING Hua. Experimental Method of High��speed Determination ofFatigue Limit for 45 Steel. Chinese Journal of Iron and Steel, 2008, 26(2): 38-0.
2008, Vol. 26 
