Abstract
The hardening mechanisms in age-hardening ferritic Fe-Ni-Al-Ti alloys have been investigated using electron microscopy, tensile testing and the application of quantitative theories of strengthening in two phase materials. The level of the strength and its dependence upon aging time have been quantitatively predicted from a model in which the effects of coherency strains, modulii differences between matrix and precipitate and antiphase boundary energy are combined. Two characteristic levels of particle strength are derived in the model from the combination of these effects. The flow stress in the alloy is then determined by the stress to pass through the random array of particles in which two levels of strength exist.
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Formerly Graduate Student at University of Queensland is now with the Australian Public Service Board, Canberra, Australia.
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Smith, I.O., White, M.G. The origin of the shear stress increment in aged ferritic Fe-Ni-Ti-Al alloys. Metall Trans A 7, 293–298 (1976). https://doi.org/10.1007/BF02644470
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DOI: https://doi.org/10.1007/BF02644470