摘要
对TC11钛合金燕尾榫连接结构在低周和高低周复合载荷作用下的断口特征进行了分析。结果表明:在微动环境下,微动磨损面上有表面金属掉块和不均匀的磨损擦伤,磨损表面出现腐蚀坑以及损伤区呈现层状及山丘状的塑性变形;在高低周复合载荷情况下,疲劳源处疲劳辉纹呈现以河流花样为主的复杂疲劳条纹,在裂纹扩展阶段,河流花样比较杂乱,裂纹扩展方向相对无序,每个低周周期中的疲劳台阶也不明显。
The fretting fatigue behavior of TC11 alloy dovetail joints under low cycle load and the interaction of high-cycle load and low-cycle load were investigated. There are some casts and wear scrape on the fretting wear surface. Grinding pits and plastic deformation are found on the surface and the damage area. Compared with low cycle load, fatigue striations are more complex under high cycle-low cycle load. During the crack propagation, the striations and the crack direction are more disorder, and the fatigue steps are not evident during each low cycle period.
出处
《机械工程材料》
CAS
CSCD
北大核心
2007年第4期34-36,共3页
Materials For Mechanical Engineering
关键词
断口分析
微动疲劳
TC11合金
燕尾榫
fractare surface analysis
fretting fatigue
TC11 alloy
dovetail joint
