Very High Cycle Fatigue Behavior and Thermographic Analysis of High Strength Steel

摘要：

Very high cycle fatigue behavior of high strength steel, were investigated using ultrasonic fatigue testing equipment at 20 kHz up to 109cycles. S-N curves at room temperature with different stress ratio (R=0.01 and R=0.1) was determined. The experimental results show that fatigue strength decrease with increasing number of cycles between 105 and 109. SEM examination of fracture surface reveals that fatigue damage was governed by the formation of cracks, and subsurface crack initiation was in the very long life range. The results shown that the portions of life attributed to subsurface crack initiation between 107 and 109 cycles are 99％.

关键词： Very high cycle fatigue High strength steel Fish eye Infrared imaging

作者: SHAO Chuang Cloude BATHIAS Danièle WAGNER TAO Hua

作者单位: School of Mechatronic Engineering, Northwestern Polytechnical University, Xi’an 710072, China LEEE, LEEE, Université PARIS X, Ville d’avray, 92410, France School of Mechatronic Engineering, Northwestern Polytechnical University, Xi’an 710072, China

会议类型: 国际会议

会议名称: The 2nd International Conference on Advances in Product Development and Reliability(第二届产品开发与可靠性进展国际会议 PDR2010)

会议地点: 沈阳

会议语种:英文

页码: 948-951

在线出版日期: 2010-07-28（万方平台首次上网日期，不代表论文的发表时间）