TC4合金激光立体成形孔洞类缺陷的超声检测

发布时间：2018-12-23 19:44

【摘要】：以TC4钛合金激光立体成形件为研究对象,探讨其内部、表面及近表面孔洞类缺陷与超声波的相互作用关系。研究结果表明,在相同检测条件下,对于TC4钛合金激光立体成形件中同深度不同孔径的长横孔缺陷,超声反射波幅值随长横孔直径的增加而增加;对于成形件中同孔径不同深度的长横孔缺陷,超声反射波幅值随长横孔所在深度增加而减小;利用5PФ8纵波直探头,能发现激光立体成形TC4钛合金中0.6 mm大小的孔洞类缺陷;超声表面波沿深度方向发现TC4钛合金激光立体成形件中槽型和孔型缺陷的能力均小于4 mm,且孔型缺陷比槽型缺陷更难发现。
[Abstract]:The interaction between the internal, surface and near surface cavity defects and ultrasonic wave was studied with TC4 titanium alloy laser stereoscopic forming parts. The results show that the amplitude of ultrasonic reflection wave increases with the increase of the diameter of the long transverse hole in the same depth and different aperture of the TC4 titanium alloy laser stereoscopic forming parts under the same testing conditions. The amplitude of ultrasonic reflection wave decreases with the increase of the depth of the long transverse hole, and the defects of 0.6 mm in TC4 titanium alloy can be found by using the 5P ~ (8) longitudinal wave direct probe, and the ultrasonic reflection wave amplitude decreases with the increase of the depth of the long transverse hole in the forming parts with the same aperture and different depth, and the ultrasonic reflection wave amplitude decreases with the increase of the depth of the long transverse hole. The ability of ultrasonic surface wave to find groove and pass defects in TC4 titanium alloy laser stereoscopic forming parts is less than 4 mm, and the pass defects are more difficult to find than groove defects.
【作者单位】：西北工业大学凝固技术国家重点实验室;中航商用航空发动机有限责任公司;南昌航空大学轻合金加工科学与技术国防重点学科实验室;
【基金】：国家863计划(2013AA031103) 国家自然科学基金(51323008;51105311;51271213) 国家973计划(2011CB610402) 高等学校博士学科点专项科研基金项(20116102110016)
【分类号】：TG115.285

【共引文献】