着色渗透在吊挂振动试验检测中的应用

Application of Dye Penetration to Suspension Vibration Test Detection

钛合金吊挂试件是飞机的重要结构。本文提出了吊挂振动疲劳试验中采用应变监控与着色渗透检测相结合的及时发现裂纹的方法,详细阐述了着色渗透检测过程的工艺及参数。渗透检测极易在结构突变处产生伪显示,选取一完好试件与疲劳试验件采用同样的检测工艺参数进行渗透检测,将得到的渗透形貌在有光源的放大镜下观察对比,确认为裂纹显示,此方法值得借鉴推广。

Titanium alloy suspension specimen is an important structure of aircraft.In this paper,a method of detecting cracks in time by combining strain monitoring and dye penetration detection in suspension vibration fatigue test is proposed,and the process and parameters of dye penetration detection process are described in detail.Penetrant detection is prone to generate false displays at structural mutations.The same process parameters are used to carry out the penetration detection for an intact specimen and two fatigue test specimen.The obtained penetration morphology is observed and compared under a magnifying glass with a light source,and it is confirmed as crack display.This method is worth learning and popularizing.