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In this work, the tungsten particulate reinforced Al2O3 dispersion strengthened copper base composites were successfully fabricated by using a vacuum hot-press sintering method. With the test temperature varying from 650 to 950 ℃ and the strain rate varying from 0.01 to 5 s-1, the W(50)/Cu-Al2O3 composites were isothermally compressed on a Gleeble-1500D thermal simulator. The true stress-strain curves of the W(50)/Cu-Al2O3 under different test conditions were obtained. The dynamic recrystallization of the W(50)/Cu-Al2O3 composite occurs during the isothermal compression. The constitutive equations and the hot deformation activation energy of W(50)/Cu-Al2O3 composites were calculated on the basis of the above experimental results.
In this work, the tungsten particulate reinforced Al2O3 dispersion strengthened copper base composites were successfully fabricated by using a vacuum hot-press sintering method. With the test temperature varying from 650 to 950 ° C and the strain rate varying from 0.01 to 5 s-1, The W (50) / Cu-Al2O3 composites were isothermally compressed on a Gleeble-1500D thermal simulator. The true stress-strain curves of the W (50) / Cu- (50) / Cu-Al2O3 composite occurs during the isothermal compression. The constitutive equations and the hot deformation activation energy of W (50) / Cu-Al2O3 composites were calculated on the basis of the above experimental results.