1. D. Raynor and J. M. Silcock, ?Strengthening Mechanisms in ?? Precipitating Alloys?, CEGB Report No. RD/L/R1613 (1969).
2. R. C. Lobb, unpublished work (1978).
3. R. M. Sharpe and W. N. Miller, unpublished work, Dounreay Nuclear Establishment (1974).
4. V. Martens and E. Nembach, Acta Metall. 23 (1975) 149.
5. ASTM STP 725;D. S. Gelles,1981