Nature 189, 826 - 827 (11 March 1961); doi:10.1038/189826b0

Theory of the Deformation and Fracture of Body-centred Cubic Transition Metals

A. A. JOHNSON

Metallurgy Department, Imperial College of Science and Technology, London, S.W.7.

EXPERIMENTS on a number of body-centred cubic transition metals¹ have shown that, above the ductile–brittle transition temperature, the yield stress, _y, varies with the average grain diameter, 2d, according to the relation: Below the transition temperature, the brittle fracture stress, _f, is related to the grain size by the similar relation:

1. Johnson, A. A. , J. Less-Common Metals, 2, 241 (1960). | Article | ISI | ChemPort |
2. Cottrell, A. H. , Trans. Met. Soc. Amer. Inst. Mech. Eng., 212, 192 (1958). | ChemPort |
3. Wronski, A. S. , and Johnson, A. A. (unpublished results).
4. Vaughan, H. G. , and Rose, R. G. , Atomic Energy Authority Rep. IGR/TN/C–583 (1958).
5. Campbell, J. D. , and Harding, J. (private communication).
6. Hull, D. , and Mogford, I. L. , Phil. Mag., 3, 1213 (1958). | ISI |
7. Johnson, A. A. , Phil. Mag., 5, 413 (1960). | ISI | ChemPort |