[1] Zhao Yang, Jia ZhongQing, Guo Rui, et al. The application of laser-EMAT technique used to testing defect in rail[J]. Advanced Materials Research, 2014, 875-877: 574-577.

[2] Clark R. Overview and needs for future developments[J]. NDT&E International, 2004, 37(2): 111-118.

[3] Papaelias M, Roberts C, Davis C. A review on non-destructive evaluation of rails: state-of-the-art and future development[J]. Rail Rapid Transit, 2008, 222(4): 367-384.

[4] Scalea F, Rizzo P, Coccia S, et al. Non-contact ultrasonic inspection of rails and signal processing for automatic defect detection and classification[J]. Insight, 2005, 47(6): 1-8.

[5] Edwards R S, Dixon S, Jian X. Characterisation of defects in the railhead using ultrasonic surface waves[J]. NDT&E International, 2006, 39(6): 468-472.

[6] Fan Y, Dixon S, Edwards R S, et al. Ultrasonic surface wave propagation and interaction with surface defects on rail-track head[J]. NDT&E International, 2007, 40(6): 471-477.

[7] Petcher P A, Potter M D G, Dixon S. A new electromagnetic acoustic transducer (EMAT) design for operation on rail[J]. NDT and E International, 2014, 65: 1-7.

[8] Cheng Jianzheng, Bond Leonard J. Assessment of ultrasonic NDT methods for high speed rail inspection[J]. AIP Conference Proceedings, 2015, 1650(1): 605-614.

[9] Aindow A M, Dewhurst R J, Palmer S B. Laser-generation of directional surface acoustic wave pulses in metals[J]. Optics Communications, 1982, 42(2): 116-120.

[10] Li J W, Chen J M. Nondestructive Testing Handbook[M]. Beijing: China Machine Press, 2001: 202-203.