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- W2065542844 abstract "The influence of 0.5 % atomic cobalt and 1 % atomic chromium additions on the precipitation hardening of Cu-4Ti alloy was studied by differential scanning calorimetry (DSC) and microhardeness measurements. The analysis of the calorimetric curves, for binary alloy, shows the presence of two overlapping exothermic reactions (stages 1 and 2) attributed to the formation of Cu 4 Ti and Cu 3 Ti particles in the copper matrix, respectively. DSC curves for Cu-4Ti-0,5Co alloy shows three exothermic effects (overlapping stages 3 and 4 and stage 5) associated to the formation of phases Ti 2 Co, TiCo and Cu 4 Ti, respectively. DSC curves for Cu-4Ti-1Cr alloy shows three exothermic reactions (stages 6, 7 and 9) and one endothermic peak (stage 8). The exothermic reactions correspond to the formation of phases Cr 2 Ti, Cu 4 Ti and Cu 3 Ti, respectively, and the endothermic reaction are attributed to the Cr 2 Ti dissolution. The activation energies calculated using the modified Kissinger method were lower than the ones corresponding to diffusion of cobalt, chromium and titanium in copper. Kinetic parameters were obtained by a convolution method based on the Johnson-Mehl-Avrami (JMA) formalism.Microhardness measurements confirmed the formation of the mentioned phases. Also, these measurements confirmed the effect of cobalt and chromium addition on the binary alloy hardness." @default.
- W2065542844 created "2016-06-24" @default.
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- W2065542844 date "2010-12-30" @default.
- W2065542844 modified "2023-09-29" @default.
- W2065542844 title "Influencia de la adición de cobalto y cromo en el proceso de precipitación en una aleación de Cu-4Ti" @default.
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- W2065542844 doi "https://doi.org/10.3989/revmetalmadrid.1042" @default.
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