Microstructural Stability of Strong 9-12 wt% Cr Steels

H. K. D. H. Bhadeshia

Abstract

The time scales over which an electricity generating plant has to operate reliably are much greater than those available for the development of new alloys, most of which are based on martensitic starting microstructures. The implementation of new alloys is therefore a major risk given that these materials will not have been subjected to tests consistent with extended service. There are two ways of mitigating the risk. Firstly to use the principles of thermodynamics to achieve microstructural stability and secondly to develop better methods for the extrapolation of short-term experimental data. Both of these techniques are discussed in this paper.

Proceedings of Super-High Strength Steels, 2--4 November 2005, Rome, Italy, Associazione Italian di Metallurgica, pp. 1-10.

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