Understanding of Inverse Coarsening of γ' precipitates in Ni-base Superalloys
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چکیده
منابع مشابه
Modeling displacive–diffusional coupled dislocation shearing of c0 precipitates in Ni-base superalloys
In Ni-base superalloys, superlattice extrinsic stacking fault (SESF) shearing of c0 precipitates involves coupled dislocation glide and atomic diffusion. A phase-field model is developed to study this process, in which the free energy of the system is formulated as a function of both displacement and long-range order parameter. The free energy surface is fitted to various fault energy data obta...
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Nickel-base superalloys are primarily used as components in jet engines and land-based turbines. While compositionally complex, they are microstructurally simple, consisting of small (50-1000 nm diameter), ordered, coherent Ni(3)(Al,Ti)-type L1(2) or Ni(3)Nb-type DO(22) precipitates (called γ(') and γ(''), respectively) embedded in an FCC substitutional solid solution consisting primarily of Ni...
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ژورنال
عنوان ژورنال: Microscopy and Microanalysis
سال: 2016
ISSN: 1431-9276,1435-8115
DOI: 10.1017/s1431927616007133