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- W2904353074 abstract "12Cr ferritic/martensitic steels with 0, 0.1 wt%, 0.2 wt% and 0.3 wt% theoretical yttrium (Y) additions were fabricated by vacuum inducting melting and casting method. Solubilities of Y in the 12Cr steels are 0.027, 0.078 and 0.17 for 12Cr-0.1Y, 12Cr-0.2Y and 12Cr-0.3Y, respectively. Phase transformations and microstructure characteristics under different heat-treatment schedules were investigated. The starting temperature of ferrite-to-austenite transformation Ac1 are maintained about 850 °C, but the finishing temperature of ferrite-to-austenite transformation Ac3 are about 950, 970, 980 and 1000 °C for 12Cr-0Y, 12Cr-0.1Y, 12Cr-0.2Y and 12Cr-0.3Y, respectively, which indicates that Ac3 increases gradually with the addition of Y. Martensite accompanied with a few δ-ferrite is the dominant structure in all the steels. The amount of δ-ferrite shows a strong dependence with the Y content and austenitizing temperature. Area fraction of δ-ferrite increases with the content of Y, which is the ferrite favouring element. The minimum amount of δ-ferrite are achieved at 950 °C for 12Cr-0Y, 12Cr-0.1Y, 12Cr-0.2Y and 1000 °C for 12Cr-0.3Y. Besides, more carbides precipitate along the martensite laths and grain boundaries in the Y-bearing steel due to the redistribution of carbon between austenite and ferrite resulting from the ferrite favouring element of Y." @default.
- W2904353074 created "2018-12-22" @default.
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- W2904353074 date "2019-05-01" @default.
- W2904353074 modified "2023-10-18" @default.
- W2904353074 title "Microstructure characteristics of 12Cr ferritic/martensitic steels with various yttrium additions" @default.
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- W2904353074 doi "https://doi.org/10.1016/j.jre.2018.08.013" @default.
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