The fracture resistance of a number of ingot-mould materials has been characterized by the energy required to achieve unstable crack propagation W measured using fracture-toughness test techniques. It was shown that W appeared to be related to the resistance of an ingot mould to major cracking. In addition, using test-block materials the effect on fracture behaviour of graphite eutectic cell size, titanium, and pearlite/ferrite content in flake irons, and of graphite morphology and pearlite/ferrite content in nodular irons was studied. It was found that all of them could have a significant effect on ingot-mould behaviour, in some cases the possible effects being drastic.
Get full access to this article
View all access options for this article.
References
1.
PRIESTA. H.: J. Strain Anal., 1975, 10, 225–232.
2.
HOLDSWORTHS. R. and JOLLEYG.: Br. Foundryman, 1975, 68, 169–172.
3.
OSTENNSONO.: Scand. J. Metall., 1973, (2), 194–196.
4.
SCOFIELDR. et al.: Int. J. Pressure Vessels Piping, 1977, (5), 73.
5.
GLOVERA. and POLLARDG.: Paper 29 (Session 11), 3rd Int. Con-gress on Fracture, International Fracture Committee, Munich, 1973.
6.
NISHIS. et al.: Jpn Foundrymen's Soc. J., Apr.1976, 48, 197–203.
7.
NORBURYA. L.Metallurgia, Dec. 1937, 69.
8.
OLDFIELDW.: BCIRAJ, March 1960, 177–192.
9.
HUGHESI. C. H.: ‘Solidification of metals‘, 184–192; 1968, Lon-don, The Iron and Steel Institute.
