Abstract
The structure, space groups, lattice parameters and stoichiometric formula for the strengthening phase in Al−Fe−Mo−Si−Zr−Ti alloys were determined by X-ray diffraction, TEM, CBED and EDX. The coarsening behavior and mechanism of the strengthening phase were studied also using TEM and EDX. Results showed that the strengthening phase was identified to be BCC Al12(Fe, Mo, Zr, Ti)3Si (Im3,a=1.263 nm) and the coarsening rates is the lowest in all the intermetallic phases of Al−Fe system, which is controlled by the diffusion of alloy element Zr in the matrix. Addition of Gd, Y make a volumetric coarsening rate one order of magnitude slower, at 477°C approaching to the coarsening rate LI2 Al3(Zr, V) phase.
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Dai, S.L., Yu, G.F. & Yan, M.G. Structure and coarsening behavior of the strengthening phase in RS Al−Fe−Mo−Si−Zn−Ti alloys. Adv Perform Mater 2, 289–298 (1995). https://doi.org/10.1007/BF00705451
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DOI: https://doi.org/10.1007/BF00705451