Research on Fatigue Test of LZ20Mn2 Axle Pipe Steel

摘要：

　　The core of ultrasonic accelerate fatigue test is resonance,and specimens need resonating with the system.The ultrasonic fatigue test method was used to investigate the high cycle fatigue properties of LZ20Mn2 axle pipe steel.Tests were conducted on cylindrical dog-bone specimens,and all fatigue loadings were controlled by inputting vibration amplitude.The results showed that the S-N curve of LZ20Mn2 axle pipe steel presented a slow-decline shape and subsurface crack initiation.The fatigue fracture was observed by SEM.Two different crack initiation mechanisms were observed which were the mixed inclusions and dislocation.Crack closure effect played an important role at fatigue crack propagation area and the fracture mechanism was a typical plastic fracture.

关键词： LZ20Mn2 axle pipe steel Ultrasonic fatigue test S-N curve subsurface crack initiation

作者: Honglei DONG Zhongguo HUANG Qinghua YUAN Jia FAN

作者单位: School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083,China School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083,China School of Material Science and Engineering, University of Science and Technology Beijing, Beijing 10 SHINENERGY TECHNOLOGIES, Inc., Beijing 100070, China

会议类型: 国际会议

会议名称: the 2010 International Conference on Frontiers of Manufacturing and Design Science(第一届制造与设计科学国际会议(ICFMD 2010))

会议地点: 重庆

会议语种:英文

页码: 2152-2156

在线出版日期: 2010-12-11（万方平台首次上网日期，不代表论文的发表时间）