Étude du comportement structural de lalliage NC 19 Fe Nb Inconel 718Report as inadecuate




Étude du comportement structural de lalliage NC 19 Fe Nb Inconel 718 - Download this document for free, or read online. Document in PDF available to download.



Abstract : In the as-received state following a double treatment at 720 and 620 °C, the structure of INC 718 consists of a γ matrix, intergranular β precipitates and Nb,TiC carbides; moreover, γ- and $\gamma{-}$ phases have precipitated in the matrix. Using different methods, the structural behaviour was analyzed which led to distinguish the temperature ranges in which occurs precipitation or dissolution of β, γ- and $\gamma{-}$ phases on heating and to define the optimum conditions of homogeneization. Furthermore a CCT diagram for INC 718 has been drawn showing the respective precipitation of γ-, $\gamma{-}$ and β phases as a function of the cooling rate applied from 990 °C.





Author: C. Slama G. Cizeron

Source: https://hal.archives-ouvertes.fr/



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