Diffusion of manganese in paramagnetic BCC iron
- PDF / 151,163 Bytes
- 2 Pages / 612 x 792 pts (letter) Page_size
- 54 Downloads / 283 Views
624-VOLUME 4, FEi3RUARY 1973
1. R. A. P. Djaic and J. J. Jonas: J. Iron Steellnst., 1972, vol. 210, pp. 256-61. 2. H. Kubota and I. Kosazu: Technical Research Laboratory, Nippon Kohan K. K., Kawasaki, Japan. TMS Paper No. A68-53, 1968, pp. 1-21. 3. A. P. Gulyayev and A. S. Shigarev: Phys. Metals Metallog., 1964, vol. 18, no. 2, pp. 73-79. 4. G. A. Wilber, J. R. Bell, J. H. Bucher, and W. J. Childs: Trans. TMS-A1ML, 1968, vol. 242, pp. 2305-08. 5. J. N. Cordea and R. E. Hook: Met. Trans., 1970, vol. 1, pp. 111-18. 6. T. L. Capeletti, L. A. Jackman, and W. J. Childs: Met. Trans., 1972, vol. 3, pp. 789-96. 7. M. J. Luton and C. M. Sellars: ActaMet., 1969, vol. 17, pp. 1033-43. 8. J. J. Jonas, C. M. Sellars, and W. J. McG. Tegart: Met. Rev., 1969, vol. 14, pp. 1-24.
9. R. A. P. Djaic: Ph.D. Thesis, McGill University, Montreal, 1973. 10. W. B. Morrison: J. Iron Steellnst., 1972, vol. 210, pp. 618-23. 11. G. Glover and C. M. Sellars: Met. Trans., 1972, vol. 3, pp. 2271-80. 12. A. T. English and W. A. Backofen: Trans. TMS-A1ME, 1964, vol. 230, pp. 396407.
Diffusion of Manganese in Paramagnetic BCC Iron J. S. KIRKALDY, P.N. SMITH, AND R. C. SHARMA
IN the course of a study of the interaction of sulfides of iron and manganese with 5-Fe, measurements of the chemical diffusion coefficient of manganese within the very short temperature range of 5-Fe were made by conventionaldiffusion couple techniques.I The microprobe analysis is particularly easy in this system since
o
--
o
o
o 5o >70 w
o
o
98 t
I
400
200
I
I
0 200 DISTANCE (MICRONS)
I
400
Fig. 1--Probability plot of diffusion profile for Mu in 6-Fe for the O vs 2.05 pct Mn couple reacted at 1446~ for half an hour. J. S. KIRKALDY and R. C. SHARMA are Stelco Professor and Graduate Student, respectively, Department of Metallurgy and Materials Science, McMaster University, Hamilton, Ontario, Canada. P. N. SMITH is Assistant Professor, Faculty of Engineering and Applied Sciences, Memorial University, St. John, Newfoundland, Canada. Manuscript submitted September 19, 1972.
METALLURGICAL TRANSACTIONS
10-6
Table 1. Diffusion Coefficient of Mn in ~-Fe
Temp., ~
tO-7
1446 1478 1494
r taJ 09
( ~ 10.8
D, cm2/s
1 2 I
1.07 X 10-7 1.57 • 10 7 1.87 • 10 7
v s 2.05 p c t M n d i f f u s i o n c o u p l e o n p r o b a b i l i t y p a p e r . This demonstrates that there is negligible dependence of t h e d i f f u s i o n c o e f f i c i e n t on t h e m a n g a n e s e c o n c e n t r a t i o n in o u r r a n g e of up to 4 p c t M n . T h e r e s u l t s of t h r e e s u c h e x p e r i m e n t s a r e s u m m a r i z e d in T a b l e I. While the temperature range experimentally availa b l e d o e s n o t l e n d i t s e l f to a n a c c u r a t e A r r h e n i u s a n a l y s i s , t h e c o m b i n a t i o n of o u r r e s u l t s w i t h t h o s e r e p o r t e d by N o h a r a and H i r a n o z for the s i m i l a r l y l i m i t e d r a n g e of p o s s i b l e r e s u l t s f o r d i f f u s i o n of m a n g a n e s e ~ in p a r a m a g n e t i c c~-Fe
Data Loading...
