High Cycle Fatigue Properties of Duplex Stainless Steel in Air and 3.5% NaCl Solution

摘要：

　　The high cycle fatigue of super duplex stainless steel of SAF 2507 was investigated by rotating bending fatigue test in both air and 3.5% NaCl environment.The results showed that there is no much reduction of the fatigue life in corrosive environment, which is 90% of the air fatigue strength.In air fatigue, failure happens in ductile mode with austenite grains having finer and straighter fatigue striations than ferrite grains.Width and spacing of striations vary with the orientation and locations when the second cracking occurs.It is not reliable to identify the phase by morphology of striations.In 3.5% NaCl environment, the fracture exhibits a mixed mode of cleavage and quasi-cleavage in ferrites and ductile in austenite grains.

关键词： duplex stainless steel fatigue limit fatigue striations ductile fracture

作者: Shurong Yu Wei Song Shuxin Li Meng Kai

作者单位: School of PetroChemical Engineering,Lanzhou University of Technology,Lanzhou 730050,China

会议类型: 国际会议

会议名称: 2014 International Symposium on Structural Integrity,ISSI2014(2014国际结构完整性学术会议)

会议地点: 兰州

会议语种:英文

页码: 373-379

在线出版日期: 2014-08-20（万方平台首次上网日期，不代表论文的发表时间）