Erratum to: The effects of sodium on the growth velocity and growth morphology of silicon in Al-Si alloys
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7---SEM m i c r o g r a p h of titanium chip at h i g h e r m a g n i f i c a The morphology h e r e is s i m i l a r to that o b s e r v e d in copa l u m i n u m and s t e e l chips although the spacing v a r i e s m a t e r i a l and orientation. M a r k e r = 1/~m.
d e p t h of c u t . B o t h c h i p s w e r e m a d e w i t h a 75 d e g d i a mond knife in a Porter Blum MT-I microtome. The thinner chip (~1000A thick) has a periodic lamella spac'omg of 1400 t o 1 8 0 0 A c o m p a r e d t o t h a t of 3000 t o 4000A for the thicker chip (~5000A thick) showing the i n c r e a s e i n l a m e l I a t h i c k n e s s w i t h d e p t h of c u t , T h e marked similarity between the internal structure as observed in transmission and the external morphology d e m o n s t r a t e s t h e p o w e r of t h i s t e c h n i q u e f o r s t u d y i n g the microscopic adiabatic shear mechanism. These micrographs clearly demonstrate that it will b e of g r e a t a d v a n t a g e t o e x a m i n e c h i p s w h i c h a r e t h i n enough for high voltage transmission electron micro-
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1. C. Zener and J. H. Holloman:J. AppI. Phys., 1944, vol. 15, p. 22. 2. C. Zener: Fracturingof Metals, pp. 3:31, Amer. Soc. of Metals, 1948. 3. R. F. Recht: Trans. ASME, J. AppL Mech., 1964, vol. 31, p. 189. 4. P. A. Thornton and F. A. Heiser: Met. Trans., 1971, vol. 2, p. 1496. 5. S. A. Manionand T. A. C. Stock: Int. Z Fract. Mech., 1970, vol. 6, p. 106. 6. B. F. von Turkovich: Trans. ASME, vol. 92, Series B, no. 1, 1970, p. 151. 7. J. T. Black: Ph.D. Dissertation, Univ. of I11.,Urbana, 1969. 8. V. A. Phillips: Direct Observations of Imperfections in Crystals, Newkirk and Wernick, eds., p. 179, John Wileyand Sons, N Y., 1962. 9. M. Ahlers and L. F. Vassamillet:J. Appl~ Phys., 1968, vol. 39, p. 3592. 10. J. T. Black: Trans. ASME, vol.93, Series B, no. 2, 1971, p. 507. 11. J. T. Black: Trans. ASME, 1972, vol. 94, Series B, no. 1, p. 307. 12. B. F. von Turkovich: Mechanics of Cutting, Proc, of 1st Int. Cemented Carbide Conf., Feb. 1, 1971, Chicago, ltl., Soc. Mech. Eng., in press. 13. D. M. Turley: ,L Inst. Metals, 1971, vol. 99, p. 271. 14. R. C. Glenn and W. C. Leslie:Met. Trans., 1971, vol. 2, p. 2945. 15. F. Jovane, F. Givsti,and A. Alto: Proc. of CIRP, Sept. 1-4, 1971, Warsaw, Poland. 16. F. Jovane, J. Carro-Cao, and J. Pomey: C. R. Acad. Scs Paris, 1971, t. 272, p. 629. 17. J. C. Lemaire and W. A. Backofen:Met. Trans., 1972, vol. 3, p- 477. 18. J. J. Jones: Disc of Paper, Trans. ASME, 1972, vol. 94, Series B, no. 1, p. 315.
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The E f f e c t s o f S o d i u m on the G r o w t h V e l o c i t y and G r o w t h M o r p h o l o g y o f S i l i c o n in A l - S i A l l o y s , b y M . F . X . G i g l i o t t i , J r . a n d G . A. C o l l i g a n
Page 933 Addendum ACKNOWLEDGMENT T h e a u t h o r s g r a t e f u l l y a c k n o w l e d g e t h e s u p p o r t of t h e N a t i o n a l S c i e n c e F o u n d a t i o n t h r o u g h G r a n t GK-28405.
METALLURGICAL TRANSACTIONS
VOLUME 3,
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