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- W3147999764 abstract "Investigations are made on the effects of strain rates on the tensile behavior and deformation modes of Duplex Ti-46.5Al-2Nb-2Cr (DP TiAl) at temperatures ranging from room temperature to 840 C and under strain rates of 0.001, 320, 800, and 1350 s -1 . The dynamic strength is higher than quasi-static strength but does not change much over the high strain rate range. Yield stress anomaly is not found. Brittle-to-ductile transition temper- ature (BDTT) increases with the increased strain rates. A Zerilli-Armstrong constitutive model with appropriate coefficients is chosen to describe the high strain rate flowing behavior. TEM analysis indicates that both ordin- ary dislocations and superdislocations are found and dis- location pile-up only appears in samples deformed under quasi-static loadings at elevated temperatures. The defor- mation twins are common in equiaxed grains and the proportion of twinned grains increases with the increased strain rate from 46-72% under quasi-static loadings to 69-95% under high strain rate loadings. No deformation twins are found in lamellar colonies." @default.
- W3147999764 created "2021-04-13" @default.
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- W3147999764 date "2010-01-01" @default.
- W3147999764 modified "2023-09-27" @default.
- W3147999764 title "Tensile impact behavior and deformation mechanism of duplex TiAl intermetallics at elevated temperatures" @default.
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