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ASTM Selected Technical Papers
Irradiation Effects on The Microstructure and Properties of Metals
By
FR Shober
FR Shober
1
Hanford Engineering Development Laboratory, Westinghouse Hanford Company
,
Richland, Wash.
;
symposium chairman
.
Search for other works by this author on:
ISBN-10:
0-8031-0388-3
ISBN:
978-0-8031-0388-7
No. of Pages:
494
Publisher:
ASTM International
Publication date:
1976

A detailed calculation is given of the effect of an impurity atmosphere on void growth under irradiation damage conditions. Norris has proposed that such an atmosphere can suppress void growth. We have found the hydrostatic stress field of a dislocation that is surrounded by an impurity atmosphere and from it have calculated the change in the effective radius of a dislocation line as a sink for interstitials and vacancies. The calculation of the impurity concentration in a Cottrell cloud takes into account the change in hydrostatic pressure produced by the presence of the cloud itself. It is assumed that the hydrostatic pressure field of an impurity atom exists over a radial distance larger than the radius of the impurity atom. It is found that void growth is eliminated whenever dislocations are surrounded by a condensed atmosphere of either oversized substitutional impurity atoms or interstitial impurity atoms. A condensed atmosphere will form whenever the average impurity concentration is larger than a critical concentration.

1.
Norris
,
D. I. R.
,
The Physics of Irradiation Produced Voids
,
Nelson
R. S.
, Ed., AERE-R7934, Atomic Energy Research Establishment, Harwell, England,
H. M. Stationery Office
,
1975
, pp. 134–139.
2.
Greenwood
,
G. W.
,
Foreman
,
A. J. E.
,
Rimmer
,
D. E.
,
Journal of Nuclear Materials
 0022-3115, Vol.
1
,
1959
, pp. 305–324.
3.
Harkness
,
S. D.
and
Li
,
C. -Y.
,
Metallurgical Transactions
 0026-086X, Vol.
2
,
1971
, pp. 1457–1470.
4.
Bullough
,
R.
and
Perrin
,
R. C.
,
Radiation-Induced Voids in Metals
,
Corbett
J. W.
and
Ianniello
L. C.
, Eds.,
U. S. Atomic Energy Commission
,
1972
, pp. 769–797.
5.
Adda
,
Y.
,
Radiation-Induced Voids in Metals
,
Corbett
J. W.
and
Ianniello
L. C.
, Eds.,
U. S. Atomic Energy Commission
,
1972
, pp. 31–83.
6.
Harkness
,
S. D.
and
Li
,
C. -Y.
,
Radiation-Induced Voids in Metals
,
Corbett
J. W.
and
Ianniello
L. C.
, Eds.,
U. S. Atomic Energy Commission
,
1972
, pp. 798–824.
7.
Bullough
,
R.
,
Eyre
,
B. L.
, and
Perrin
,
R. C.
,
Journal of Nuclear and Applied Technology
, Vol.
9
,
1970
, pp. 346–355.
8.
Bullough
,
R.
and
Perrin
,
R. C.
in
Irradiation Effects on Structural Alloys for Nuclear Applications
, ASTM STP 484,
American Society for Testing and Materials
,
1970
, pp. 317–329.
9.
Foreman
,
A. J. E.
, “
A Note on the Dose Dependence of Void Growth in Irradiated Materials
,” Report AERE-R-6358,
Atomic Energy Research Establishment
, Harwell, England,
1970
.
10.
Li
,
C. -Y.
,
Franklin
,
D. G.
, and
Harkness
,
S. D.
,
Irradiation Effects on Structural Alloys for Nuclear Applications
, ASTM STP 484,
American Society for Testing and Materials
,
1970
, pp. 347–360.
11.
Harkness
,
S. D.
and
Li
,
C. -Y.
,
Proceedings
, Symposium on Radiation Damage in Reactor Materials, International Atomic Energy Agency,
Vienna
,
1969
, Vol.
2
, pp. 189–213.
12.
Bullough
,
R.
and
Perrin
,
R. C.
, Voids Formed by Irradiation of Reactor Materials,
British Nuclear Energy Society
,
Harwell, England
,
1971
, pp. 79–107.
13.
Green
,
W. V.
and
Weertman
,
J.
,
Nature
 0028-0836, Vol.
243
,
1973
, pp. 159–160.
14.
Green
,
W. V.
and
Weertman
,
J.
,
Radiation Effects
 0033-7579, Vol.
22
,
1974
, pp. 9–13.
15.
Ham
,
F. S.
,
Journal of Applied Physics
 0021-8979, Vol.
30
,
1959
, pp. 915–926.
16.
Heald
,
P. T.
and
Speight
,
M. V.
,
Philosophical Magazine
 1478-6435, Vol.
30
,
1974
, pp. 869–875.
17.
Heald
,
P. T.
,
Philosophical Magazine
 1478-6435, Vol.
31
,
1975
, pp. 551–558.
18.
Kuhlmann-Wilsdorf
,
D.
,
Scripta Metallurgica
, Vol.
7
,
1973
, pp. 1059–1063.
19.
Margvelashvili
,
I. G.
and
Saralidze
,
Z. K.
,
Soviet Physics—Solid State
 0038-5654, Vol.
15
,
1974
, pp. 1774–1776.
20.
Nabarro
,
F. R. N.
,
Theory of Crystal Dislocations
,
Clarendon Press
,
Oxford, England
,
1967
, pp. 399–404.
21.
Thompson
,
R.
,
Acta Metallurgica
 0001-6160, Vol.
6
,
1958
, pp. 23–28.
22.
Wolfer
,
W. G.
and
Ashkin
,
M.
,
Journal of Applied Physics
 0021-8979, Vol.
47
,
1976
, pp. 791–800.
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