Study of ageing effects of a low-interstitial 18Cr-2Mo ferritic steel |
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| Authors: | F Gauzzi G Principi B Verdini |
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| Institution: | (1) Dipartimento Ingegneria Meccanica, 2 Universita' di Roma  Torvergata, Roma;(2) Istituto di Chimica Industriale, Universita' di Padova, Padova;(3) Consiglio Nazionale delle Ricerche, Roma, Italy |
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| Abstract: | The phase transformations which occur in the 18Cr-2Mo ferritic steel by annealing in the temperature range 603–1093 K have been studied using Moessbauer spectroscopy and X-ray diffraction. It is found that the 748 embrittlement is to be ascribed to Cr redistribution and/or to the formation of an intermetallic R-type phase. Precipitation of an h.c.p. Laves phase Fe (Mo,Nb) of MgZn2-type takes up at about 850 K and Nb to Mo substitution goes on by increasing the annealing temperature. |
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