Abstract
The growth of γ l–Fe4N precipitates at 350° C has been followed in Fe–0·05 wt.-%N alloys containing controlled oxygen and phosphorus levels. The marked retarding effect of small quantities of these elements on the coarsening of the nitride particles is demonstrated for a range of alloys. The particle sizes and the size distributions of the precipitates have been measured and comparisons with the predictions of the Lifshits–Wagner coarsening equations have been made. The particle coarsening behaviour is shown to be consistent with earlier observations of interfacial reaction control of precipitate growth.
Get full access to this article
View all access options for this article.
References
1.
Kosakevitch
P.
and
Urbain
G.
Mem. sci. Rev. met ., 1961 , 58, 932 and 517 .
2.
Hondros
E. D.
, Proc. Roy. Soc ., 1965 , A286, 479.
3.
Hondros
E. D.
, Acta Met ., 1968 , 16 , 1377 .
4.
Darken
L. S.
and
Turkdogan
E. T.
Proc. Conf. ‘Heterogeneous Kinetics at Elevated Temperatures’, Univ. of Pennsylvania , 1969 .
5.
Smith
G. V.
,
MacMillan
J. H.
, and
Dulis
E. J.
Trans. ASM , 1951 , 43, 692.
6.
Roberts
W.
,
Grieveson
P.
, and
Jack
K. H.
Proc. Intl. Symp. on Metallurgical Chemistry, Sheffield , 1971 .
7.
Pipkin
N. J.
,
Grieveson
P.
, and
Jack
K. H.
ibid .
8.
Lifshits
M.
and
Slyozov
V. V.
J. Physics Chem. Solids , 1961 , 19, 35.
9.
Wagner
C.
, Z. Electrochem ., 1961 , 65 , 581 .
10.
Pehlke
R. D.
and
Elliott
J. F.
Trans. AIME , 1963 , 227, 844.
11.
Hayes
P.
, PhD Thesis, Strathclyde Univ., Glasgow , 1974 .
12.
Podgurski
H. H.
,
Oriani
R. A.
, and
Dowis
F. N.
Trans. AIME , 1969 , 245 , 1603 .
13.
Turkdogan
E. T.
and
Grieveson
P.
J. Electrochem. Soc ., 1967 , 114, 59.
14.
Jack
K. H.
, Proc. Roy. Soc ., 1948 , A195, 34.
15.
Lehtinen
B.
and
Roberts
W.
J. Microscopy , 1973 , 97, 197.
16.
Mehl
R. F.
,
Barret
C. S.
, and
Jorabek
H. S.
Trans. AIME , 1934 , 113, 811.
17.
Booker
G. R.
, Acta Met ., 1961 , 9, 590.
18.
Saltykov
S. A.
, ‘Stereometric Metallography’ , 2nd Ed . 1958 : Moscow (Metallurgizdat) .
19.
De Hoff
R. T.
, Trans. AIME , 1962 , 224, 474.
20.
Ardell
A. J.
and
Nicholson
R. B.
J. Phys. Chem. Solids , 1966 , 27 , 1793 .
21.
Smith
A. F.
, Acta Met ., 1967 , 15 , 1867 .
22.
Greenwood
G. W.
, Inst. of Metals Mono. No . 33 , 1968 , 103 .
23.
Ardell
A. J.
, ibid ., 111 .
24.
Boyd
J. D.
and
Nicholson
R. B.
Acta Met ., 1971 , 19, 1105 and 1379 .
25.
Kramer
J. J.
,
Pound
G. M.
, and
Mehl
R. F.
ibid ., 1958 , 6, 763.