1. 1)K. Kawano, S. Suzuki, K. Kanamori, H. Tamagawa, Y. Kyo and Y. Oya, Copper and Copper Alloy, 55, p.140(2016).
2. 2)Y. Kyo, Y. Oya, K. Kanamori, K. Kawano and M. Kumagai, Copper and Copper Alloy, 56, p.166(2017).
3. 3)D. H. Thompson and A. W. Tracy, Trans. AIME, 185, p.100(1949).
4. 4)K. Nagata and S. Sato, Journal of the JCBRA, 17, p.202(1978).
5. 5)DIN 50916 Part 2, Testing of copper alloys; stress corrosion cracking test using ammonia; testing of components(1985).