摘要
对发动机压气机转子叶片试验件裂纹进行失效分析。通过对故障叶片进行外观检查、断口分析、表面形貌检查、截面金相检查、材质分析及断口区域成分分析,并对叶片振动应力分布进行计算,确定叶片裂纹性质和产生原因。结果表明:故障压气机转子叶片裂纹为高周疲劳性质,导致叶片过早出现疲劳裂纹的主要原因是叶身表面振动应力最大区域抛光、喷丸效果差,存在原始机械加工痕迹;最后提出避免叶身表面残留原始机械加工痕迹的改进建议。
The crack of an air-compressor rotor blade of aero-engine was analyzed. The failure mode and cause were found out by visual inspection,fracture analysis,surface inspection,metallographic examination,material analysis,chemical composition analysis as well as vibration stress distribution calculation of blade. The results indicate that the cracking of the air-compressor compressor rotor blade is high-cycle fatigue cracking. The residual original machining trace at the maximum vibration stress region is the main cause for the cracking of the blade. Finally,some measures were put forward to improve the surface integrity of the blades.
出处
《失效分析与预防》
2016年第1期51-55,共5页
Failure Analysis and Prevention
