航空科学技术Issue(5)：30-33,34,5.
蒸发器叶片失效分析
Failure Analysis of Evaporator Blade
摘要
Abstract
Since vacuum thin-iflm evaporator in some facility has individual blade failure fracture, metal urgical check is made on fracture surface of the blade and its failure causes are thoroughly analyzed from macro and microcosmic aspects. Crack initiation and growth mechanism is discussed in this paper. It points out that blade failure is caused by processing defects and low-cycle fatigue rapture under alternating stress, and excitation sources were transient impact force and friction occurring when blade and internal wal impacted and rubbed with each other, which brought blade under vibration stress fatigue fracture. Speciifc modiifed measures are provided in the paper by virtue of operating conditions and thus reliability of facility is improved.关键词
蒸发器/失效分析/裂纹源/疲劳断裂/金相分析Key words
evaporator/failure analysis/microcrack source/fatigue fracture/metal urgical analytical引用本文复制引用
钟山,刘志刚,向宏辉,顾杨..蒸发器叶片失效分析[J].航空科学技术,2013,(5):30-33,34,5.
