Application of Nondestructive Detection of Aluminum Using Laser Ultrasonic Technology and EMAT Method

Yanhong Gu; Zhenzhen Zhang; Xianhe Gao; Chaoyi Shi; Jun Lu; Sheng Zhang; Zehua Zhou

doi:10.3788/CJL202047.0504002

Chinese Journal of Lasers, Volume. 47, Issue 5, 0504002(2020)

Application of Nondestructive Detection of Aluminum Using Laser Ultrasonic Technology and EMAT Method

Yanhong Gu¹, Zhenzhen Zhang^2、*, Xianhe Gao¹, Chaoyi Shi¹, Jun Lu¹, Sheng Zhang¹, and Zehua Zhou¹

Author Affiliations

¹Institute of Advanced Manufacturing Engineering, Hefei University, Hefei, Anhui 230601, China

²Laser Insitute, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250103, China

show less

Abstract Get PDF(in Chinese)

Figures & Tables(11)

Fig. 1. Schematic of experimental setup with two different laser ultrasonic receiving methods

Download full size

Fig. 2. Typical laser ultrasonic signal of aluminum plate thickness measurement by laser interferometer

Download full size

Fig. 3. Relation curve between surface wave amplitude and LTSD

Download full size

Fig. 4. Schematic of artificial defective aluminum plate sample

Download full size

Fig. 5. Laser ultrasonic longitudinal wave signal of 16 mm×16 mm×6 mm artificial defect

Download full size

Fig. 6. Results of EMAT detection method. (a) Typical laser ultrasonic signal of aluminum plate thickness measurement; (b) longitudinal wave amplitude versus stand-off distance

Download full size

Fig. 7. Measurement accuracy for aluminum plate thickness versus EMAT measurement distance

Download full size

Fig. 8. Laser ultrasonic surface wave signal of artificial defect detected by EMAT

Download full size

Table 1. Thickness measurement results for the aluminum plates by laser interferometer
View table
Table 1. Thickness measurement results for the aluminum plates by laser interferometer
Samplethickness /mm t₁ /μs t₂ /μs Calculatedthickness /mm Relativeerror /%
16 4.12 5.51 16.69 4.31
20 4.12 6.72 20.81 4.04
23 4.12 7.63 23.86 3.73
25 4.12 8.25 25.92 3.68
30 4.12 9.81 31.08 3.59

Table 2. Depth of cracks on aluminum plate by laser interferometer
View table
Table 2. Depth of cracks on aluminum plate by laser interferometer
Sampledepth /mm t /μs Calculateddepth /mm Relativeerror /%
2 5.23 2.21 10.71
4 4.92 4.22 5.42
6 4.60 6.28 4.73

Table 3. Thickness measurement results for the aluminum plates by EMAT

View table

Table 3. Thickness measurement results for the aluminum plates by EMAT

Samplethickness /mm	T₁ /μs	Calculatedthickness /mm	Relativeerror /%	T₂ /μs	Calculatedthickness /mm	Relativeerror /%	Averagerelative error /%
16	16.30	16.49	3.06	32.64	16.70	4.34	3.70
20	16.72	20.41	2.05	33.45	20.45	2.23	2.16
23	17.12	23.62	2.69	34.32	23.92	4.00	3.34
25	17.21	24.29	2.84	34.35	24.04	3.84	3.34
30	18.00	29.67	1.10	9.81	30.33	1.09	1.10

Tools

Get Citation

Copy Citation Text

Yanhong Gu, Zhenzhen Zhang, Xianhe Gao, Chaoyi Shi, Jun Lu, Sheng Zhang, Zehua Zhou. Application of Nondestructive Detection of Aluminum Using Laser Ultrasonic Technology and EMAT Method[J]. Chinese Journal of Lasers, 2020, 47(5): 0504002

Download Citation

EndNote(RIS)BibTex Plain Text

Set citation alerts for article

Save article for my favorites