1. 1) A. Ito: Materials for Space Technology, (Materials Science Society of Japan, 1991) p. 45.
2. 2) Y. Watanabe, T. Hashimoto and M. Yoshida: Technical Report of National Aerospace Laboratory TR-1285, (1996) pp. 1-13.
3. 3) A. Lingenfelter: Conference Proceeding on Superalloy 718-Metallurgy and Applications, (1989) pp. 673-683.
4. 4) M. D. Rowe: Supplement to the Welding Journal, (2006) pp. 27-34.
5. 5) J. R. Davis: Heat-Resistant Materials, (ASM International, Materials Park, OH, 1997) p. 226.