Cavitation wear of Т91 ferritic-martensitic steel

Keywords

ferritic-martensitic steel, structure, hardness, cavitation erosion, wear.

Cite as

Rostova H. Yu., Tolstolutska G. D., Vasilenko R. L., Kolodiy I. V., Kovalenko V. I., Marinin V. G., Tikhonovsky M. A., and Kuprin O. S. Cavitation wear of Т91 ferritic-martensitic steel. Physico­chemical Mechanics of Materials. 2022. 58(2), 079-083.

Abstract

The microstructure, hardness and cavitation wear of the T91 ferritic-martensitic steel were studied and compared with other reactor steels of the Eurofer 97 and Cr18Ni10Ti grades. It is found that the cavitation resistance of T91 steel is 34 times higher than that of Eurofer 97 steel and 11 times higher than traditionally used Cr18Ni10Ti austenitic steel. The T91 steel alloyed with molybdenum and niobium, in contrast to Eurofer 97 ferritic-mar­tensitic steel alloyed with tungsten and tantalum, has larger prior austenite grain size (20 vs. 6 μm), length and width of martensitic packets (30–40 and 3–10 vs. 10–20 and 2–4 μm, respectively) and microhardness (2.47 vs. 2.07 GPa).

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