摘要
单晶叶片在常温和高温下的疲劳性能存在较大的差异。针对某发动机高涡叶片高循环疲劳失效故障,进行了高温振动疲劳性能试验研究。试验依据高频感应加热原理,研究了单晶材料高涡叶片高温振动疲劳试验的加温方式,介绍了高温振动疲劳试验的试验方法。通过一种试验夹具定位装置和闭环温度控制系统确保了应力场及温度场的精度和有效性。根据某高涡叶片前期的试验研究和故障定位,确定了叶片的试验温度和加温位置。试验获取了单晶高涡叶片在450℃下的疲劳极限,并探索了叶片在900℃下的疲劳强度。结果表明,该单晶高涡叶片在450℃下的疲劳极限较常温条件有明显提升,在900℃条件下的疲劳性能较450℃有所下降。
The fatigue properties of single crystal blade are quite different at room temperature and high temperature.In view of the high cycle fatigue(HCF)fault of high pressure turbine blade(HPTB)of an engine,the high temperature vibration fatigue test are carried out.Based on the principle of high frequency induction heating,the heating mode of single crystal HPTB are studied.The method of HCF test with high temperature is introduced in this test.Through a test fixture positioning device and closed-loop temperature control system,the accuracy and effectiveness of stress field and temperature field are ensured.According to the early experimental result and fault location of HPTB,the test temperature and heating area are determined.The fatigue strength of single crystal HPTB at 450℃ is obtained,meanwhile,the fatigue strength at 900℃ is explored.The test results show that the fatigue strength of single crystal HPTB at 450℃ is obviously improved comparing with normal temperature fatigue strength,which decreases at 900℃ comparing with 450℃ test result.
作者
杜传宇
姜睿
杜鹏飞
刘跃聪
杨洪旭
Du Chuanyu;Jiang Rui;Du Pengfei;Liu Yuecong;Yang Hongxu(AECC Shenyang Engine Research Institute,Shenyang 110015,Liaoning,China)
出处
《工程与试验》
2022年第2期22-25,共4页
Engineering and Test
关键词
振动疲劳试验
感应加温
温度场
高涡叶片
疲劳强度
vibration fatigue test
induction heating
temperature field
high pressure turbine blade
fatigue strength
