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- W2044939620 abstract "Quantitative analysis of the zirconium and chromium cooperative effect on the structure and phase composition, after solidification and heat treatment, of the TNM type alloy, was performed using both experimental techniques and thermodynamic calculations. It is shown that the joint alloying by chromium and zirconium up to 1 at.% does not change the sequence of phase transformations during solidification and subsequent cooling of the TNM alloy. Rather, it significantly decreases the α2-phase amount and increases β-phase amount. Increasing the amount of β-phase is associated with a high beta-stabilizing effect of chromium, whose partition coefficients k(β/γ) and k(β/α) are significantly higher than 1 (ranging from 1.67 to 3.8). Zirconium is distributed quite uniformly with partition coefficients k(β/γ) and k(β/α) close to 1. HIP treatment of the alloy with chromium and zirconium up to 1 at.% at 170 MPa and 1250 °C leads to a significant reduction of the α(γ/α2)-phase fraction, and increases the amount of γ-globular in comparison to vacuum annealing at 1250 °C. The higher content of the softest γ-globular decrease the hardness from 365 HV to 333 HV, increases the total elongation of the alloy from 0.5% to 0.8% at room temperature and substantially decreases the ultimate tensile strength from 750 MPa to 715 MPa." @default.
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- W2044939620 date "1988-10-01" @default.
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- W2044939620 title "Thermodyhamic modeling of the Ti-rich phases in the TiAl system" @default.
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- W2044939620 doi "https://doi.org/10.1016/s0036-9748(88)80247-3" @default.
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