1. 1) C. H. HAMILTON and G. E. STACHER : Met. Progress, 109 (1976) March, p. 34
2. 3) Y. MURAKAMI : Proc. of 4th Int. Conf. on Titanium (1980), p. 153
3. 4) J. C. WILLIAMS and M. J. BLACKBURN : Trans. ASM, 60 (1967), p. 373
4. 5) M. OKA, C. S. LEE and K. SHIMIZU : Metall. Trans., 3 (1972), p. 37
5. 6) B. S. HICKMAN : Trans. Metall. Soc. AIME, 245 (1969), p. 1329