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- W1995116095 abstract "Abstract The mechanisms of tempered martensite embrittlement (TME) in steels have seldom been studied using both transmission electron microscopy and Mossbauer-effect spectroscopy. This paper presents the results of such a study in which the microstructure and impact toughness of Fe-0.25C-10Cr based martensitic steels were investigated as a function of tempering temperature. Unlike the nickelmodified alloys, the manganese-containing steels exhibited evidence for the onset of TME after tempering at 400°C. Conventional transmission electron microscopy revealed the presence of inter-lath cementite precipitates in all the steels tempered at this temperature. Extensive coarsening of the intra-lath carbides was also noted, especially in the base alloy and the manganese-containing alloys. Using Mossbauer-effect spectroscopy it was possible to calculate the percentage of decomposed inter-lath retained austenite and the fraction of cementite precipitates in each alloy. It was concluded that TME did not correlate with the decomposition of inter-lath retained austentite, but rather with the coarsening of inter- or intra-lath carbides. It is suggested that nickel atoms may restrict the growth of elongated carbides by adsorption on the edges of the platelets." @default.
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- W1995116095 date "1989-02-01" @default.
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- W1995116095 title "On the mechanisms of tempered martensite embrittlement" @default.
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- W1995116095 doi "https://doi.org/10.1016/0001-6160(89)90251-4" @default.
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