Abstract
Acoustic emission ring-down counting has been used to monitor sub-critical crack growth by stress corrosion of mild steel in disodium hydrogen phosphate, -brass in sodium nitrite and magnesium–7% aluminium in potassium chromate/sodium chloride mixtures, and by hydrogen embrittlement in mild steel and a 7179 T651 aluminium alloy. The level of acoustic emission activity varies widely between different alloy/environment systems and is dependent upon microstructure, fracture path and crack growth rate. The practical significance of the results is discussed.
Get full access to this article
View all access options for this article.
References
1.
Okada
H.
,
Yukawa
K.
, &
Tamara
H.
Corrosion , 1974 , 30 , 253
2.
Reuter
W. G.
, &
Hartbower
C. E.
Engng Fract. Mech. , 1971 , 3 , 493
3.
Gerberich
W. W.
, &
Hartbower
C. E.
Proc. Fundamental Aspects of Stress Corrosion Cracking , 1967 , pp. 420 –438 . (Ohio : NACE )
4.
Dunegan
H. L.
, &
Tetelman
A. S.
Engng Fract. Mech. , 1971 , 2 , 387
5.
Hartbower
C. E
,
Reuter
W. G.
,
Morris
C. F.
& Crimmins, P . O., ASTM-STP 505 , 1972 , pp. 187 –221
6.
Chaskelis
H. H.
,
Cullen
W. H.
, &
Krafft
J. M.
ASTM-STP 559 , 1974 , pp. 31 –44
7.
Kikuta
Y.
,
Ochiai
S.
, &
Irie
T.
Tetsu-to-Hagane , 1978 , 64 , 558
8.
Carter
J. J.
, 3rd Tewkesbury Symp. on Fracture , 1974 , pp. 61 –74 , Melbourne University
9.
Chakprani
D. G.
, &
Pugh
E. N.
Metall. Trans. , 1975 , 6A , 1155
10.
Cox
B.
, Corrosion , 1973 , 29 , 157
11.
Cox
B.
, ibid. , 1974 , 30 , 191
12.
Magnani
N.
J., Experimental Mechanics , 1973 , 13 , 526
13.
Green
A. T.
, Metals Engng Quart. , 1971 , 11 , 61
14.
McIntyre
P.
, &
Green
G.
British J. of NDT , 1978 , 20 , 135
15.
Parkins
R. N.
,
Holroyd
N. J. H.
, &
Fessler
R. R.
Corrosion , 1978 , 34 , 253
16.
Yu
J.
,
Holroyd
N. J. H.
, &
Parkins
R. N.
ASTM-STP, to be published
17.
Hardie
D.
,
Holroyd
N. J. H.
, &
Parkins
R. N.
Metal Sci. J. , 1979 , 13 , 603
18.
Wearmouth
W. R.
,
Dean
G. P.
, &
Parkins
R. N.
Corrosion , 1973 ;29 , 251
19.
Smith
H. R.
, &
Piper
D. E.
Stress Corrosion Cracking in High Strength Steels and in Titanium and Aluminium Alloys’, Ed. B. F. F., 1972 , pp. 17 –27 (Washington : NRL )
20.
Holroyd
N. J. H.
,
Hardie
D.
, &
Parkins
R. N.
private communication
21.
McBride
S. L.
, &
Hutchison
T. S.
Can. J. Physics , 1976 , 54 , 1824
22.
Hampstead
M. A.
, &
Mukherjee
A. K.
Experimental Mechanics , 1974 , 14 , 33
23.
Green
G.
, &
Clark
G.
British J. of NDT , 1980 , 22 , 62
24.
McK
Cousland, S.
.& Scala, C. M. , Metal Sci. J. , 1981 , 15, 609
25.
Brindley
B. J.
,
Holt
J.
, &
Palmer
I. G.
Non-Destructive Testing , 1973 , 6 , 299
26.
Hsu
N. N.
,
Simmons
J. A.
, &
Hardy
S. C.
Materials Evaluations , October 1977 , 35 , 100
27.
Pollock
W. J.
,
Rogers
L. M.
, &
Hardie
D.
34th Ann. Conf. Australasian Inst. Metals, May 1981 , pp. 85 –88 , Surfers Paradise