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- W2353876247 abstract "The newly developed W(50)/Cu-Al2O3 composites were prepared with the matrix of copper dispersion-strengthened by Al2O3 particles and the reinforced phase of tungsten particles by vacuum hot-press sintering method.With the test temperature varying from 750 ℃ to 950 ℃,the strain rate ranging from 0.1 s-1to 5 s-1 and the true strain of 0.7,the isothermal compression test of the W(50)/Cu-Al2O3 composites were carried out on a Gleeble-1500D thermal simulator.The results indicate that the W(50)/Cu-Al2O3 composite shows the dynamic recrystallization characteristics under the test condition.Both the deformation temperature and the strain rate have obvious influence on flow stress.The flow stress increases with increasing strain and tends to be constant after the peak value.The peak stress value increases with increasing strain rate and decreases with increasing deformation temperature.With increasing the temperature and decreasing strain rate,more and more strain-free recrystallized fine grains at intersections of grain boundary are observed.It indicates that the main softening mechanism of the composites during hot compression deformation is dynamic recrystallization.The hot compression deformation behavior can be represented by a Zener-Hollomon parameter in the hyperbolic constitutive equations.The average hot deformation activation energy of the composites is calculated,which is 176.05 kJ/mol." @default.
- W2353876247 created "2016-06-24" @default.
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- W2353876247 date "2011-01-01" @default.
- W2353876247 modified "2023-09-25" @default.
- W2353876247 title "Hot compression deformation behavior of W(50)/Cu-Al_2O_3 composites prepared by vacuum hot-press sintering" @default.
- W2353876247 hasPublicationYear "2011" @default.
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