Acoustic Emission Testing of a Friction Stir Welding Aluminum Alloy Pressure Vessel
To study the acoustic emission (AE) characteristics of an aluminum alloy pressure vessel manufactured by use of a friction stir welding (FSW) method, a tubular aluminum alloy pressure vessel containing an incomplete penetration defect was monitored by AE technology during hydraulic blasting testing. The characteristic parameter analysis method and fracture surface morphology observation were used to analyze the AE signal characteristics. The results show that the characteristic parameters of the AE amplitude, signal count, and energy jumped significantly when a large expansion of the defect occurred, and they stayed at a high level with the rise in pressure. AE technology can effectively monitor FSW aluminum alloy pressure vessel incomplete penetration defects and provide early warning. The results of this study are of great relevance to the detection of incomplete penetration defects in FSW aluminum alloy pressure vessels.
KeywordsFriction stir welding Aluminum alloy Acoustic emission Pressure vessel
The authors thank the Jiangsu Ankao Company for providing the friction stir welded aluminum alloy pressure vessel used in this study, and for their related cooperation.
- 1.X. Jiang-ming, K. Li-ming, X. Ii, Nondestructive evaluation for friction stir welding. Nondestruct Test 30(12), 934–945 (2008)Google Scholar
- 2.Z. Zhong-Zheng, G. Jian-Ming, H. Liang, The application of acoustic emission technology on coke tower inspection. Nondestruct Test 32(2), 143–148 (2010)Google Scholar
- 4.F. Hong-wei, Y. Ya-lin, L. Sheng-hua, Acoustic emission testing on 1000 m3 LPG pressure vessel. Press Vess Tech 22(5), 56–58 (2005)Google Scholar
- 5.G.-t. Shen, Z. Yu-feng, D. Qing, Acoustic emission sources from field test of pressure vessels. Nondestruct Test 21(7), 321–325 (1999)Google Scholar
- 14.G. Rongsheng, G. Shen, L. Shifeng, Acoustic emission signal processing. Nondestruct Test 24(8), 341–345 (2002)Google Scholar