Resonance testing of cast iron
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An outline is given of the existing nondestructive vibration tests for cast irons and their drawbacks in terms of the dimensional accuracy of the components. A proposal is made for a new test based on the change of resonant frequency with vibration amplitude exhibited by cast irons. This proposal is evaluated using material data obtained from dynamic tests of a wide range of cast iron specimens. A test rig is described suitable for testing cylindrical cast bars, and typical results are presented in relation to material strength. There is also a brief description of preliminary testing on cast products.
Key wordsNDE cast iron vibration analysis modulus strength
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- 1.P. J. Emerson and W. Simmons, Final report on the evaluation of the graphite form in ductile iron and of the effect of graphite form on mechanical properties,Trans. AFS 84:109–128 (1976).Google Scholar
- 2.M. A. O. Fox and R. D. Adams, Prediction of the damping capacity of cast iron from the variation of its dynamic modulus with strain amplitude,JISI 210:527–530 (1972).Google Scholar
- 3.M. A. O. Fox and R. D. Adams, Correlation of the damping capacity of cast iron with its mechanical properties and microstructure,JMES 15:81–94 (1973).Google Scholar
- 4.R. Lovett and N. Carter, Sonic testing in the iron foundry,Br. Foundryman (March 1965):77–82.Google Scholar
- 5.A. G. Fuller and P. J. Emerson, A simple non-destructive test for verifying casting quality,BCIRA J. 11:358–375 (1963).Google Scholar
- 6.J. A. F. Jarvis, Determination of tensile strength of cast iron by ultrasonics, inProc. 4th Int. Conf. NDT 1963 (Butterworths, London, 1964).Google Scholar
- 7.R. D. Adams et al., The dynamic properties of unidirectional carbon and glass fibre reinforced plastics in torsion and flexure.J. Comp. Mat. 3:594–603 (1969).Google Scholar
- 8.R. D. Adams and M. A. O. Fox, Measurement of the damping capacity and dynamic modulus of high damping metals under direct cyclic stress.J. Phys. D. Appl. Phys. 5:1274–1283 (1972).Google Scholar
- 9.R. D. Adams et al., A vibration technique for non-destructively assessing the integrity of structures.JMES 20:93–100 (1978).Google Scholar