TC4 合金激光立体成形孔洞类缺陷的超声检测

阮雪茜; 林鑫; 黄春平; 黄卫东

doi:doi:10.3788/cjl201542.1203001

中国激光, 2015, 42 (12): 1203001, 网络出版: 2015-12-08

TC4 合金激光立体成形孔洞类缺陷的超声检测下载： 533次

Ultrasonic Nondestructive Testing of Hole Type Defects in Laser Solid Forming TC4 Alloy

论文大纲

阮雪茜 ^1,2,*林鑫 ¹黄春平 ³黄卫东 ¹

作者单位

¹ 西北工业大学凝固技术国家重点实验室, 陕西西安 710072

² 中航商用航空发动机有限责任公司, 上海 200241

³ 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, 江西南昌 330063

激光技术激光立体成形 TC4钛合金超声波表面波 laser technique laser solid forming TC4 titanium alloy ultrasonic surface wave

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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 inner, surface and near- surface defects of laser solid forming TC4 alloy and ultrasonic are studied. The results show that under the same testing conditions, reflection amplitude value increases with the increasing of long lateral hole diameter for the long lateral hole defects with the same depth and different diameters; and the reflection amplitude value decreases with the increasing of the depth of long lateral hole for the long lateral hole defects with the same diameter and different depths; holes within 0.6 mm diameter can be found in laser solid forming TC4 alloy using 5PФ8 straight longitudinal wave probe. The ability of SAW to found defects less than 4mm from the surface in the depth direction is less than 4 mm and the hole defect is harder to find than the groove.

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阮雪茜, 林鑫, 黄春平, 黄卫东. TC4 合金激光立体成形孔洞类缺陷的超声检测[J]. 中国激光, 2015, 42(12): 1203001. Ruan Xueqian, Lin Xin, Huang Chunping, Huang Weidong. Ultrasonic Nondestructive Testing of Hole Type Defects in Laser Solid Forming TC4 Alloy[J]. Chinese Journal of Lasers, 2015, 42(12): 1203001.

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