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- W3184328995 endingPage "111355" @default.
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- W3184328995 abstract "This study presents the creep deformation and rupture behavior of Ti–48Al–6Nb–0.05Y2O3 alloy prepared by induction skull melting (ISM). Creep studies were carried out at 800 °C and 300 MPa for various time periods. The fine defect structures evolve throughout the creep tests and govern the deformation of Y2O3-bearing alloy. The deformation is mainly supported by the dislocation climb in γ phase, which takes place by the formation of jog-pairs. With the increase in creep time, the increasing climb component in α2 phase is beneficial for the co-deformation of lamellar structure. The propensity of mechanical twinning also increases during creep. The formation of deformation twins in lamellar γ phase more readily occurs than that in massive γ phase owing to the lower nucleation energy barrier. Besides, stress concentration around the Y2O3 particles can promote deformation twin nucleation. Several cracks were formed along the colony boundaries perpendicular to the loading direction in the middle of secondary stage. The propagation and coalescence of intergranular cracks and cavities in the tertiary stage are the main causes for the failure of specimens." @default.
- W3184328995 created "2021-08-02" @default.
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- W3184328995 date "2021-09-01" @default.
- W3184328995 modified "2023-10-01" @default.
- W3184328995 title "Creep deformation and rupture behavior of a high Nb containing TiAl alloy reinforced with Y2O3 particles" @default.
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- W3184328995 doi "https://doi.org/10.1016/j.matchar.2021.111355" @default.
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