基于独立分量分析的搅拌摩擦焊缝超声无损评价

原可义; 韩赞东; 史清宇; 钟约先

基于独立分量分析的搅拌摩擦焊缝超声无损评价

清华大学机械工程系, 北京 100084;清华大学摩擦学国家重点实验室, 北京 100084

基金项目: 国家自然科学基金资助项目(51375258)

计量
- 文章访问数: 412
- HTML全文浏览量: 1
- PDF下载量: 242
出版历程
- 收稿日期: 2014-04-02

Ultrasonic nondestructive evaluation of friction stir welding joints based on independent component analysis

Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China;State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China

摘要

摘要: 指出搅拌摩擦焊焊缝的弱连接是目前超声无损检测的难点. 提出了一种新的超声特征成像方法,包括使用独立分量分析方法(independent component analysis,ICA)对时域超声信号进行分解,进而获得检测信号的特征矩阵;根据检测信号能量传递的特点,确定检测目标特征矢量的筛选方法,将检测信号向特征矢量投影,将投影能量和作为特征参数,对搅拌摩擦焊焊缝进行声成像. 应用该方法对不同拉伸强度的搅拌摩擦焊焊缝进行了声成像检测,并与常规C扫描方法进行了对比. 结果表明,该方法的检测结果与拉伸试验具有较好的一致性,对于搅拌摩擦焊焊缝的检测灵敏度高于常规C扫描方法.
- 搅拌摩擦焊 /
- 超声 /
- 独立分量分析 /
- 焊缝
Abstract: The ‘kissing-bond’ defect in friction stir welding (FSW) joints is difficult to detect with conventional ultrasonic method. A new ultrasonic feature imaging method was proposed for the problem. The method was composed of these steps: getting feature space of inspecting signal by decomposing time-domain signal with independent component analysis (ICA) method, finding out feature vectors for detecting targets according to energy transfer characteristic in ultrasonic detection, projecting ultrasonic signal to the feature vectors; obtaining feature parameter value by accumulating all the projections, using the feature parameter value to reconstruct the image of FSW joints. This method was used to conduct ultrasonic imaging for FSW joints with different tensile strength, and the images were also compared with ones generated by conventional C scan. The results showed that, inspecting results with this new method had good coherence with tension experiments, and showed a better detecting sensitivity for FSW joints evaluation than conventional C scan.
- friction stir welding /
- ultrasonic /
- independent component analysis /
- weldments

HTML全文

参考文献(9)

[1]	鄢东洋, 史清宇, 吴爱萍, 等. 搅拌摩擦焊接过程的试验测量及分析[J]. 焊接学报, 2010, 31(2): 67-70. Yan Dongyang, Shi Qingyu, Wu Aiping, et al. Measurement and analysis of friction stir welding process[J]. Transactions of the China Welding, 2010, 31(2): 67-70.
[2]	Rosado L S, Santos T G,Piedade M, et al. Advanced technique for non-destructive testing of friction stir welding of metals[J]. Measurement, 2010, 43(8): 1021-1030.
[3]	李红克, 史清宇, 王鑫, 等. 铝合金平板搅拌摩擦焊接应力变形分析[J]. 焊接学报, 2008, 29(2): 81-84. Li Hongke, Shi Qingyu, Wang Xin, et al. Residual stress and distortion of Al alloy panels welded by FSW[J]. Transactions of the China Welding, 2008, 29(2): 81-84.
[4]	Oiwa N, Kida K, Iwaki T, et al. A test of phased array ultrasonic testing of aluminium alloy friction stir welded joints[J]. Welding International, 2008, 22(8): 511-517.
[5]	刚铁, 赵雪梅, 林三宝, 等. 搅拌摩擦焊接头抗拉强度无损表征[J]. 焊接学报, 2009, 30(6): 1-4. Gang Tie, Zhao Xuemei, Lin Sanbao, et al. Non-destructive evaluation of FSW tensile property[J]. Transactions of the China Welding, 2009, 30(6): 1-4.
[6]	Rosado L S, Santos T G, Ramos P M, et al. A differential planar eddy currents probe: Fundamentals, modeling and experimental evaluation[J]. NDT & E International. 2012, 51(1): 85-93.
[7]	Almeida G, Gonzalez J, Rosado L, et al. Advances in NDT and materials characterization by eddy currents[C]// Forty Sixth CIRP Conference on Manufacturing Systems 2013. Setúbal, Portugal, 2013: 359-364.
[8]	Caravaca D S, Bird C R, Beamish K, et al. Correlation of phased array inspection and fatigue performance of FSW joints[C]// ASME 2007 26th International Conference on Offshore Mechanics and Arctic Engineering. San Diego, California, USA, 2007: 243-248.
[9]	Johnston P H.Addressing the limit of detectability of residual oxide discontinuities in friction stir butt welds of aluminum using phased array ultrasound[C]// Review of Progress in Quantitative Nondestructive Evaluation. Kingston, Rhode Island, USA, 2009: 1902-1909.