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[2] B. L. Chen, The Base of Welding Metal (in Chinese) (China Mechine Press, Beijing, 1982) p. 130.

[3] C. Z. Chen, Applied Laser (in Chinese) 17, 149 (1997).

[4] R. H. Phillips and E. A. Metzbower, Welding 71, 201s (1992).

[5] Y. Tian, Metallography Analysis of Fracture in Welding Zone (China Mechine Press, Beijing, 1992) p. 23.