文献类型：会议论文

英文题名：Effect of surface nanocrystallization on fatigue behavior of 35# carbon steel

作者：Liao, L. B.[1];Li, D.[1];Fan, Z.[1];Xu, H.[1];Zhang, L.[1]

机构：[1]E China Univ Sci & Technol, Sch Mech & Power Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

会议论文集：Fracture Mechanics Symposium (FM2008)

会议日期：OCT 31-NOV 05, 2008

会议地点：Hangzhou, PEOPLES R CHINA

语种：英文

外文关键词：Surface ultrasonic impact peening; 35# carbon steel; Nanostructured surface layer; Fatigue behavior

摘要：A nanostructured surface layer was formed on 35# carbon steel by means of surface ultrasonic impact peening (SUIP). The microstructure of the peened surface layer was characterized by using transmission electron microscopy (TEM). Microhardness distribution along the depth from the peened surface layer was measured, and residual stress in the topmost surface was measured at the same time. Fatigue behavior of the carbon steel subjected to the SUIP process was investigated. A nanostructured layer with average grains size of 12.7nm was formed, of which microhardness is higher than twice of that in matrix and residual compressive stress can reach -366MPa. The SUIP process has improved the fatigue strength as much as 15% for the carbon steel based on fatigue life 5 x 10(6) cycles.