The fatigue-crack initiation behaviour of an 18% Ni maraging steel has been examined in both air and 3·5% sodium chloride solution. Cracks were found to initiate almost exclusively at iron silicate inclusions, in both air and sodium chloride solution, although cracks initiated considerably more easily in the corrosive environment. The crack-initiation behaviour in air is conslstent wah debondlng mechanisms, and it isproposed that debonding of inclusions by selective corrosion of the metal/inclusion interface could be responsible, at least in part, for the deleterious effect of the sodium chloride solution.
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References
1.
THOMPSONN., WADSWORTHN. J., and LOUATN.: Philos. Mag., 1956, I, 113.
2.
HEMPELM.: ‘Proc. int. conf. fatigue of metals’, held in London and New York1956, 543; London, Institution of Mechanical Engineers.
3.
SEEGERA.: Colloquium on ‘Fatigue of metals’, Stuttgart, 1964.
4.
FoasrruP. J. E.: Nature, 1953, 171, 172.
5.
COTTRELLD A. H. and. HULL: Proc. R. Soc., 1957, A242, 211.
6.
KENNEDYA.: ‘Processes of creep and fatigue in metals‘, 1962, London, Edinburgh, Oliver and Boyd.
7.
STOLENF. B., CUMMINGSH. N., and SCHULTEW. C.: ‘Proc. int. conf. fatigue of metals’, held in London and New York1956, 439; London, Institu-tion of Mechanical Engineers.
8.
GROSSKREUTZJ. C. and SHAWG. G.: ‘Proc. 2nd. int. conf. fracture‘, (ed. PrattP. L.), 620; 1969, London, Chapman and Hall.
9.
DUCKWORTHW. E. and INESONE.: ‘Clean steel‘, 87; 1963, London, The Iron and Steel Institute.
10.
SHINT. Y. and ARAIUT.: Trans. Iron Steel inst. Jpn, 1973, 13, 11. D. J. MCADAM, JR and G. W. GEIL: Proc. ASTM, 1928, 41, 696.
11.
EvAtisU. R.: The corrosion and oxidation of metals’, 1960, London, Edward Arnold.
12.
LAIRDC. and DUQUETTED. J.: ‘Corrosion fatigue: chemistry, mechanics and microstructure‘, (eds. DevereuxO. et al.), 88; 1972, Houston, Tex., National Association of Corrosion Engineers.
13.
PAYNEJ. H. and STAEHLER. W.: ‘COTTOSiOn fatigue: chemistry, mechanics and microstructure‘, (eds. DevereuxO. et al.), 211; 1972, Houston, Tex., National Association of Corrosion Engineers.
14.
GOODIERN. J.: J. Eng. Power (Trans. ASME A), 1933, 55, 39.
