Inverse segregation in Al-10 pct Cu
- PDF / 365,218 Bytes
- 2 Pages / 612 x 792 pts (letter) Page_size
- 58 Downloads / 208 Views
i 13 1.2
I.I
~b LO
g ~ 0.9 0 ~ 0.8 I'-
~ 0.7 N
~
.6 0.~ ! 0.4 03 I 500
I 600
I 700
I 800
I 900
1. E. T. Turkdogan and J. V. Vinters:Met. Trans., 1972, vol. 3, p. 1561. 2. M. A. Osman,F. S. Manning,and N. O. Philbrook: AIChEJ., 1966, vol. 12, p. 685. 3. N. M. McKewanand N. D. Smith: Arner. Inst. Meclz Eng., 1962, vol. 21, p. 3. 4. L. yon Bogdandyand H. J. EngeU:in The Reduction oflron Ores, SpringerVerlag, Berlin, 1971. 5. Hinary W. St. Clair: U.S. Bureau of MinesReport of Investigation7128, 1968. 6. E. Bickneseand R. Clark: Trans. TMS-AIME, 1966, vol. 236, p. 2. 7. N. Scrivner:Ph.D. Dissertation,Carnegie-MellonUniversity,1972. 8. C. Karatas: Ph.D. Dissertation,State Universityof New York at Buffalo, 1977. 9. A. C. Fieldnerand W. A. Selvig: U.S. Bureau of MinesBulletin 492, p. 50, 1951. 10. E. R. Jetter and F. Foote: J. Chem. Phys., 1933, vol. 7, p. 29. 11. United States Steel Corporation: The Making, Shaping and Treating of Steel, 9th ed., Pittsburgh, 1971. 12. J. Szekely,J. W. Evans,and H. Y. Sohn: in Gas-SolidReactions, Academic Press, 1976. 13. H. Y. Sohn and J. Szekely: Cher~ Eng. Sci., 1972, vol. 27, p. 763. 14. E. A. Mason,A. P. Malinauskas,and R. B. Evans:J. Chem. Phys., 1967, vol. 46, p. 3199. 15. J. Szekely,C. I. Lin, and H. Y. Sohn: CherrLEng. Sci., 1973, vol. 28, p. 1975. 16. L. D. Darken and R. M. Gurry: J. Amer. Chem. Soc., 1945, vol. 67, p. 1398. 17. O. Kubaschewski,E. L. Evans, and C. B. Aleock:Metallurgical Thermochemistry, 4th ed., PergamonPress,New York, N.Y., 1967. 18. J. H. Krasuk and J. M. Smith: AIChEJ., 1972, vol. 18, p. 506. 19. J. Szekelyand C. I. Lin: Met. Trans. B, 1976, vol. 7B, p. 493.
REACTION TEMPERATURE (*C)
Fig. 3--Plot of g a s - s o l i d reaction modulus ~ v s reaction temperature.
Inverse Segregation in AI-IO pct Cu B . P R A B H A K A R AND F . W E I N B E R G
Fig. 4--Scanning e l e c t r o m i c r o g r a p h of the u n r e a c t e d wustite pellets at a magnification of 2370 t i m e s .
(Defines the ratio:
M e a s u r e d w e i g h t l o s s a t t i m e t~./ theoretical total weight loss Greek Letters
PFeO
Porosity, e f f e c t i v e n e s s f a c t o r , d e f i n e d in E q s . [9] a n d [10], d e n s i t y of w u s t i t e , m o l e / c m 3, a n d g a s - s o l i d r e a c t i o n m o d u l u s , d e f i n e d in E q . [7].
150-VOLUME 9B, MARCH 1978
I n v e r s e s e g r e g a t i o n in A 1 - C u a l l o y s h a s b e e n s h o w n to o c c u r a s a r e s u l t of e n r i c h e d i n t e r d e n d r i t i c f l o w t o w a r d t h e c h i l l f a c e d u e to v o l u m e s h r i n k a g e o n c o o l i n g a n d s o l i d i f i c a t i o n . E x p e r i m e n t a l o b s e r v a t i o n s of the solute concentration at the chill face have been s h o w n to a g r e e w e l l w i t h c a l c u l a t e d v a l u e s d e t e r m i n e d f r o m a m a t h e m a t i c a l m o d e l of t h e p r o c e s s . 1,2 S o l u t e c o n c e n t r a t i o n s away f r o m the i n t e r f a c e a l s o s h o w e d good agreement between experiment and model calculati
Data Loading...
