Micro-damage of Tungsten Fiber Reinforced Copper Matrix Composites under Hypervelocity Impact

Abstract

Wf/Cu78Al10Fe6Ni6 composite was fabricated from Cu78Al10Fe6Ni6 alloy and tungsten fiber by infiltration casting. Wf/Cu78Al10Fe6Ni6 composite hypervelocity projectile impacted concrete target at the speed of 2.4 km/s by a two-stage light gas gun. Microstructure of the residual projectiles after penetration was observed with transmission electron microscope (TEM). Results show that due the effect of high temperature and pressure during the process of penetration, there are different microstructures in different zones of the residual projectiles, i.e. amorphous microstructures, recrystallization microstructures, twins, and dislocations in the order from warhead to afterbody. Matrix copper alloy melts and then rapidly solidifies owing to high temperature produced by projectiles during the process of impact, and thus amorphous microstructures are generated. Recrystallization microstructures are generated because of rotational dynamic recrystallization of copper matrix. Twins and high-density dislocations are generated due to serious plastic deformation of projectiles under large dynamic loads in the process of penetration.

Behavior of tungsten under irradiation and plasma interaction

“…Yet another composite material class was derived by the use of tungsten wires, fiber, and meshes as a reinforcement of copper base alloys: the copper-tungsten composites (e.g. [460,[477][478][479][480][481][482][483][484][485][486][487][488][489]). Also tungsten particle reinforcement was applied to copper materials including the production of functionally graded parts (e.g.…”

Research progress of graphene in metal-based solid self-lubricating composites

“…Therefore, during the addition process, graphene particles will be dispersed in a dispersant and then mixed with metal powder for compaction. In recent years, the emergence of molecular level mixing methods has also successfully solved the problem of difficult dispersion of graphene, and has also been widely used in the preparation of metal matrix self-lubricating composites [17][18][19] . Powder metallurgy is the most traditional method for preparing self-lubricating composite materials.…”

Influences of Material Parameters on Terminal Effect of PELE with Tungsten Fiber Composite Jacket

“…The existing researches show that the matrix sheds gradually during the penetrating process and tungsten fibers answer for armor-piercing mainly. On account of the advantage of big slenderness, the penetration performance of TFC projectile overmatches that of TA projectile [6][7][8].…”