(北京航空材料研究院，北京 100095)
摘 要: 研究表面加工状态对Ti-1023钛合金疲劳性能的影响，结果表明：经纵抛后的试样表面粗糙度比圆磨试样低1个数量级，其表面压应力是圆磨试样表面压应力的3倍；当循环次数大于107时，Ti-1023钛合金纵抛试样疲劳极限比圆磨试样疲劳极限提高36%；零件可以通过表面喷丸处理在表层引入残余压应力场和表面加工改善表面粗糙度相结合的方法，达到提高零件疲劳性能的目的。
关键字: Ti-1023钛合金；表面完整性；表面粗糙度；表面压应力；疲劳性能
on fatigue property of Ti-1023 titanium alloy
（Beijing Institute of Aeronautical Materials, Beijing 100095, China）
Abstract:The effect of surface machining state on the fatigue property of Ti-1023 titanium alloy was studied. The results show that the test sample surface roughness by longitudinal polishing is one order of magnitude lower than that by circumferential grinding, the surface compressive stress of longitudinal polishing samples is threefold of that of circumferential grinding samples; the rotating bending fatigue limit of longitudinal polishing samples for 1×107 cycles is improved by about 36% than that of circumferential grinding samples. Surface compressive stress field can be induced by shot peening and surface roughness can be improved by surface manufacture to increase the fatigue property of Ti-1023 titanium alloy.
Key words: Ti-1023 titanium alloy; surface integrity; surface roughness; surface compressive stress; fatigue property
