The effect of temperature on fatigue-crack propagation in air for 1·8 Ni–Cr–Mo–V steels over the range 24–400°C has been investigated. The variables examined were: (i) specimen orientation (Y–X and X–Y); (ii) steel preparation route (vacuum or air melted); and (iii) vanadium content. In general increasing the test temperature resulted in increased fatigue-crack growth rates, the same trend being observed for both Y–X and X–Y oriented specimens. The air-melted steel exhibited higher crack growth rates than the vacuum-melted steels. Fractographic studies showed that the crack-propagation mechanism was temperature dependent in the steels studied, but differed for vanadium-bearing and vanadium-free steels.
MST/48
Get full access to this article
View all access options for this article.
References
1.
JONESP. J. and TETELMANA. S.: Eng. Fract. Mech.,1979, 12, 79–97.
SADANANDAK. and SHAHINIANP.: in ‘Fracture mechanics’, STP 700, 152-163; 1980, Philadelphia, Pa, American Society for Testing and Materials.
5.
JAMESL. A.: ‘Fatigue-crack propagation behaviour of Inconel 600’, Report HEDL—TME 76-43, Hanford Engineering Development Laboratories, Richland, Wash., May 1976.
6.
JAMESL. A.: ‘Fatigue-crack propagation behaviour of Inconel 718’, Report HEDL—TME 75-80, Hanford Engineering Development Laboratories, Richland, Wash., Sept. 1975.
7.
SADANANDAK. and SHAHINIANP.: Met. Technol.,1982, 9, 18–25.
8.
SADANANDAK. and SHAHINIANP.: J. Mater. Sci.,1978, 13, 2347–2357.
9.
SHAHINIANP., WATSONH. E., and HAWTHORNEJ. R.: J. Eng. Mater. Technol. (Trans. ASME H), 1974, 96, 242–248.
10.
CLARKW. G.: J. Mater.,1971, 6, 134–149.
11.
JAMESL. A. and WILLIAMSJ. A.: J. Nucl. Mater., 1973, 47, 17–22.
12.
JAMESL. A.: Weld. J., 1977, 56, 386s-389s.
13.
SHAHINIANP., WATSONH. E., and SMITHH. H.: J. Mater. 1972, 7, 527–535.
14.
OHMURAT., PELLOUXR. M., and GRANTN. J.: Eng. Fract. Mech.,1973, 5, 909–922.
15.
JAMESL. A.: ‘The effect of temperature upon the fatigue-crack propagation behaviour of Hastelloy X-280’, Report HEDL—TME 76-40, Hanford Engineering Development Laboratories, Richland, Wash., May 1976.
16.
CLARKW. G.: Eng. Fract. Mech.,1970, 2, 107–123.
17.
JAMESL. A.: ‘The effect of temperature upon the fatigue-crack propagation behaviour of Inconel X-750’, Report HEDL—TME 76-39, Hanford Engineering Development Laboratories, Richland, Wash., May 1976.
18.
SHAHINIANP., SMITHH. H., and WATSONH. E.: in ‘Fatigue at elevated temperatures’, STP 520, (ed. CardenA. E. et al.), 387–400; 1973, Philadelphia, Pa, American Society for Testing and Materials.
19.
HAIGHJ. R., SKELTONR. P., and RICHARDSC. E.: Mater. Sci. Eng.,1976, 26, 167–174.
AUSTENI. M.: in ‘The measurement of crack length and shape during fracture and fatigue’, (ed. BeeversC. J.), 164–180; 1980, Warley, West Midlands, Engineering Materials Advisory Services Ltd.
28.
BEGLEYJ. A. and TOOLINP. R.: Int. J. Fract.,1973, 9, 243–253.
29.
GELLM. and LEVERANTG. R.: in ‘Fatigue at elevated temperatures’, STP 520, (ed. CardenA. E. et al.), 37–67; 1973, Philadelphia, Pa, American Society for Testing and Materials.
