Wf/Cu82Al10Fe4Ni4composite was fabricated by means of infiltration casting. By the microstructure observation of the composite with the aid of scanning electron microscopy（SEM） and transmission electron microscopy（...Wf/Cu82Al10Fe4Ni4composite was fabricated by means of infiltration casting. By the microstructure observation of the composite with the aid of scanning electron microscopy（SEM） and transmission electron microscopy（TEM）, it can be found that there are（Fe, Ni）,AlFe, Al3 Ni, and Cu3 Al precipitated phases existing in the matrix alloy. By two-stage light gas gun, Wf/Cu82Al10-Fe4Ni4composite hypervelocity projectile into concrete target test with the speed of 2.2 kmás-1is finished. By microstructure observation, it can be found that the failure mode of Wf/Cu82Al10Fe4Ni4composite projectile during penetration is the rapid peeling of tungsten fibers from the projectile, which makes the projectile display good selfsharpening property. Meanwhile, it can be found that microstructure morphology change of Wf/Cu82Al10Fe4Ni4composite occurs after hypervelocity impact. The density of dislocations around the large-dimensional（Fe, Ni）,AlFe, Al3 Ni, and Cu3 Al precipitated phases in the matrix alloy rises sharply. At the same time, there are largedimensional deformed twins existing in local regions and stacking faults existing inside the twins.展开更多
基金financially supported by the Fundamental Research Funds for the Central Universities (No. DL12BB04)the National Natural Science Foundation of China (Nos. 31200434 and 31370566)
文摘Wf/Cu82Al10Fe4Ni4composite was fabricated by means of infiltration casting. By the microstructure observation of the composite with the aid of scanning electron microscopy（SEM） and transmission electron microscopy（TEM）, it can be found that there are（Fe, Ni）,AlFe, Al3 Ni, and Cu3 Al precipitated phases existing in the matrix alloy. By two-stage light gas gun, Wf/Cu82Al10-Fe4Ni4composite hypervelocity projectile into concrete target test with the speed of 2.2 kmás-1is finished. By microstructure observation, it can be found that the failure mode of Wf/Cu82Al10Fe4Ni4composite projectile during penetration is the rapid peeling of tungsten fibers from the projectile, which makes the projectile display good selfsharpening property. Meanwhile, it can be found that microstructure morphology change of Wf/Cu82Al10Fe4Ni4composite occurs after hypervelocity impact. The density of dislocations around the large-dimensional（Fe, Ni）,AlFe, Al3 Ni, and Cu3 Al precipitated phases in the matrix alloy rises sharply. At the same time, there are largedimensional deformed twins existing in local regions and stacking faults existing inside the twins.
