Mechanical Properties of Martensite in Heat-Resistant Steels

H. K. D. H. Bhadeshia


It is interesting that martensite is the key microstructure in the most modern of creep resistant steels. This may be an accidental consequence of alloy design, or it may be a fortunate outcome. For the energy generation industries, the temperatures are such that creep occurs with the climb of dislocations over obstacles. It is argued that in these circumstances, it is favourable to have a fine martensite plate microstructure. Factors controlling the size of martensite plates are discussed and novel experiments are proposed to identify the role of the martensite plate boundaries. At the same time, there are some detrimental consequences of a martensitic or bainitic microstructure which need to be controlled for optimum properties.

Proceedings of Ultra-Steel 2000, National Research Institute for Metals, Tsukuba, Japan, 2000, pp. 205-214.

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Creep-Resistant Alloys

Ferritic Steels

Austenitic Steels

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