摘要
针对导体构件表面裂纹检测问题,采用三点弯曲法模拟多种自然裂纹试样。研究了钢、铝合金中表面裂纹的电位法测量精度,得出不同材料的裂纹扩展规律。结果表明,电位法对钢合金表面裂纹的测量精度约为0.1mm,但对铝合金的测量精度较差,这是因为铝合金中的裂纹存在粘连现象,使测试结果较实际值偏小,但测量误差可控制在20%以内。
To measure surface cracks in conductor, test samples are made to simulate natural defects by 3-poim bending test. The crack growth behavior in material is achieved after comparing and studying the measurement of surface cracks using electric potential drop method. The results show that the precision of measurement is about 0. 1 mm for cracks in steel alloy, while it is not good for aluminium alloy because of the accretion of cracks, it makes the value smaller than the actual, but the measuring error is less than 20%.
出处
《无损检测》
北大核心
2007年第7期404-406,共3页
Nondestructive Testing
关键词
电位法
测量精度
裂纹
三点弯曲法
Crack
3-Point bending test
Measuring precision
Potential drop method
