The stress corrosion cracking resistance of 2091 Al—Li alloy in underaged, and in peak aged condition was investigated in chloride solutions with or without sulphate addition using both the static load technique and the slow strain rate technique. It is shown that the underaged material is more resistant than peak aged material. Sulphate additions to chloride solutions increase the stress corrosion cracking susceptibility. Metallographic cross-section observations show the simultaneous occurrence of other kinds of corrosion: generalised. corrosion, pitting corrosion, intergranular corrosion, and exfoliation corrosion. It appears that stress corrosion cracking susceptibility increases as the extent of intergranular corrosion decreases.
Get full access to this article
View all access options for this article.
References
1.
ChristodoulouL., StrubleL., and PICKENSJ. R.: in ‘Aluminium-lithium alloys II’, (eds.SandersT. H.Jr, and StarkeE. A.Jr,), 561; 1983, New York, TMS AIME.
2.
RinkerJ. G., MarekM., and SANDERST. H.Jr,: in ‘Aluminium-lithium alloys II’, (eds.SandersT. H.Jr, and StarkeE. A.Jr,), 597; 1983, New York, TMS AIME.
3.
PizzoP. P., GalvinR. P., and NELSONH. G.: in ‘Aluminium-lithium alloys 11’, (eds.SandersT. H.Jr, and StarkeE. A.Jr,), 627; 1983, New York, TMS AIME.
4.
VasudevanA. K., ZimanP. R., JHAS. C., and SANDERST. H.Jr: in ‘Aluminium-lithium alloys 111’, (eds.BakerC. et al.), 303; 1986, London, The Institute of Metals.
5.
HolroydN. J. H., GrayA., SCAMANSG. M., and HERMANNR.: in ‘Aluminium-lithium alloys III’, (eds.BakerC. et al.), 310; 1986, London, The Institute of Metals.
6.
CraigJ. G., NewmanR. C., JARRETTM. R.’, and HOLROYDN. I. H.: Proc. 4th Int. Aluminium-Lithium Conf., (eds.ChampierG. et al.); J. Phys. (France), 1987, 48, (Suppl. C3), 825.
7.
MagninT. and RebiereM.: Proc. 4th Int. Aluminium-Lithium Conf., (eds.ChampierG. et al.); J. Phys. (France), 1987, 48, (Suppl. C3), 835.
8.
AhmadM.: Proc. 4th Int. Aluminium-Lithium Conf., (eds.ChampierG. et al.); J. Phys. (France), 1987, 48, (Suppl. C3), 871.
9.
GrayA.: Proc. 4th Int. Aluminium-Lithium Conf., (eds.ChampierG. et al.); J. Phys. (France), 1987, 48, (Suppl. C3), 891.
PizzoP. P., GalvinR. P., and NELSONH. G.: in ‘Environment sensitive fracture: evaluation and comparison of test methods’, (eds.DeanS. W. et al.), STP821, 173;1984, Philadelphia, PA, ASTM.
13.
PizzoP. P. and DaeschnerD. L.: Proc. Int. Conf. on ‘Aluminium alloys: their physical and mechanical properties’, Vol. 2, 1197; 1986, Cradley Heath, Engineering Materials Advisory Services.
14.
MagninT., DubessyC., and RIEUXP.: Proc. Int. Conf. on ‘Aluminium alloys: their physical and mechanical properties’, Vol. 2, 1177; 1986, Cradley Heath, Engineering Materials Advisory Services.
15.
MeletisE. I., SaterJ. M., and SANDERST. H., Jr: Proc. Int. Conf. on ‘Aluminium alloys: their physical and mechanical properties’, Vol. 2, 1152; 1986, Cradley Heath, Engineering Materials Advisory Services.
16.
ColvinE. L., MurthaS. J., and WYSSR. K.: Proc. Int. Conf. on ‘Aluminium alloys: their physical and mechanical prop-erties’, Vol. 3, 1853; 1986, Cradley Heath, Engineering Materials Advisory Services.
17.
DorwardR. C.: Mater. Sci. Eng., 1986, 84, 89.
18.
DorwardR. C. and HasseK. R.: Corrosion, 1987, 43, 408.
19.
DorwardR. C. and HasseK. R.: Corrosion, 1988, 44, 932.
20.
SheppardT. and ParsonN. C.: Mater. Sci. Technol., 1987, 3, 345.
21.
LumsdenJ. B. and AllenA. T.: Corrosion, 1988, 44, 527.
22.
SchnurigerS., MankowskiG., ROQUESY., CHATAINIERG., and DABOSIF.: Proc. 4th Int. Aluminium—Lithium Conf., (eds.ChampierG. et al.); J. Phys. (France), 1987, 48, (Suppl. C3), 851.
23.
ReboulM. and MeyerP.: Proc. 4th Int. Aluminium—Lithium Conf., (eds.ChampierG. et al.); J. Phys. (France), 1987, 48, (Suppl. C3), 881.
24.
KimS. S., LeeE. W., and SHINK. S.: Scr. Metall., 1988, 22, 1831.
25.
KimN. J., HoweJ. M., and BODENE. G.; Proc. 4th Int. Aluminium—Lithium Conf., (eds. ChampierG. et al.); J. Phys. (France), 1987, 48, (Suppl. C3), 457.
