On the α–α′ miscibility gap of fe–cr alloys
Web15 de mar. de 2024 · As with other high-Cr FeCrAl systems, the Fe-25Cr-5Al-RE alloy may also be prone to the composition of the body-centered cubic (BCC) high-Cr ferrites into a Fe-rich substrate and Cr-rich α′ precipitates [11,12,13].Considering the potential degradation in the mechanical properties of Fe-25Cr-5Al-RE alloys under thermal processing and … WebThe miscibility gap of an Fe-Cr-Co system is further examined by monitoring the microstructures and the magnetic properties of the alloys. It is shown that the shape of …
On the α–α′ miscibility gap of fe–cr alloys
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WebThe experiments revealed two distinct phase transformations: (i) at 720 ± 10 K (447 ± 10 °C), the Fe-20Cr alloy transformed from α'(Fe-rich) + α″(Cr-rich) two-phase microstructure to α single phase and (ii) at 925 ± 10 K (652 ± 10 °C), the ferromagnetic single-phase α transformed to paramagnetic state. WebExperimental data on partial ordering and α′ precipitation in Fe–Cr alloys and ferritic steels containing up to 15at.% Cr are summarized. From this data and computer simulations employing the most advanced Fe–Cr cohesive models, the Fe-rich phase boundary of the α–α′ miscibility gap is constructed. This boundary is critically compared with the …
Web25 de mar. de 2024 · In this study, Fe18wt.%Cr alloy in solid solution state and pre-aged to produce relatively coarse CrRP was irradiated with 8 MeV Fe ions. The irradiation conditions involved two midrange doses of 0.37 and 3.7 displacements per atom (dpa), a wide range of dose rates (10-5–10-3 dpa/s) and temperatures (300–450 °C). WebINIS Repository Search provides online access to one of the world's largest collections on the peaceful uses of nuclear science and technology. The International Nuclear Information System is operated by the IAEA in collaboration with over 150 members.
Web(1) Concentration of chromium in the Fe-rich phase ( α) of the Fe-Cr14 sample annealed at 415 oC is equal to 10.5 at% while that found in α after annealing at 450 oC is equal to 13.3 at%. (2) For the He +-ions irradiated sample the Fe-rich border at 415oC is shifted by ~3 at% towards a higher Cr content i.e. the miscibilityt gap is narrower. Web20 de jan. de 2009 · Using atomistic simulations of Fe–Cr alloys and computational thermodynamics techniques, we study the influence of short range order (SRO) on the location of the α–α' miscibility gap.
Web19 de fev. de 2024 · Uniaxial strain was applied to aging Fe–Cr alloys to study the morphological orientation and kinetics of the nanoscale α′ phase by utilizing phase-field simulation. The effects of applied uniaxial compressive and tensile strain on the two and three-dimensional morphology as well as on the separation kinetics of the …
Web28 de mar. de 2016 · The separation of a Cr-enriched nanometer-scale α′ phase can induce the embrittlement of Fe-Cr alloys at high temperature, and the separation kinetics of the α′ phase determines its spatial morphology. The quantitative kinetics of the α′ phase formed by spinodal decomposition was studied in a Fe-42 at.% Cr alloy by phase-field simulation at … fundfolio tax filingWeb1 de jun. de 2013 · The effects of Fe-rich (α) and Cr-enriched (α′) phase separation, occurring during aging at 475 °C on the microstructure and mechanical properties of … girls alabama cheer outfitWeb1 de dez. de 2008 · The Fe–Cr–Al alloy system has the potential to form an important class of enhanced accident-tolerant cladding materials in the nuclear power industry owing … girls airsoftWebA system of particular interest is the binary alloy system Fe-Cr, since it is both 15 an ideal model material and the base system for the stainless steel alloy category, suffering from low 16 temperature embrittlement due to phase separation. girls alabama clothingWebAs a major improvement, the metastable α/α' miscibility gap is accurately described in agreement with experimental data and a recent CALPHAD parametrization. ... As a first … girls alabama sweatshirtWebThe Fe-Cr miscibility gap calculated by applying the 96 common–tangent construction to the mixing free energy (ΔG mix) obtained as described above, is shown in 97 Figure 1(a). Any homogeneous solution cooled into the miscibility gap will tend to decompose into Fe-rich 98 and Cr-rich regions with a net reduction in the free energy. fund for assistance to private educationWebThe phase diagrams of binary alloys are known to vary with pressure. Within the framework of solution-type models, the variation is controlled by the pressure dependence of the elemental end members, which is relatively well known, and that of the excess interaction, which is unknown. fund for christian service