Failure of Tungsten Heavy Alloys Subjected to Dynamic Transverse Loading

Abstract

ABSTRACTguns. This has led to a consideration of the effects of velocity on efficiency of long rod penetrators, with the A new type of experiment has been developed to results shown in Figure 1, which is based on the subject rods to dynamic transverse impact similar to that penetration formula for tungsten heavy alloy (WHA) encountered in attack of modem armors. Two tungsten rods found in Subramanian et al. [1]. The evident alloys with five different surface finishes were examined, conclusion from the figure is that, for RHA penetration It was found that there were two failure modes: one with a fixed L/D WHA rod, the most efficient impact involved transverse fracture that initiates from surface velocity is about 2.2 km/s. flaws. The other was a consequence of gouge instability on the sliding surface. Polishing suppressed the first 1.6 mode and enhanced the second.

Dynamic fracture of tungsten heavy alloys

“…The failure observed in the transverse impact test resembles the bending failure in a drop-tower test [1]. The WNiCo alloy was also significantly more resistant to transverse failure in the drop testing.…”

“…The WNiFe alloy was very similar. The materials were also investigated for radial variations in grain morphology, but these were minimal [1].…”

“…A new transverse impact experiment was devised by Tarcza [1] in order to load specimens under conditions that better mimic those that can occur during armor penetration. The experiment was specifically intended to model the slot-cutting stage of a yawed rod impact.…”

“…Upon close SEM examination of the EDM, SP, and EP surfaces of both alloys, it became apparent that significant damage existed in the form of extensive surface microcracking of tungsten grains. Details of the effects of surface preparation can be found in [1,5].…”

“…Extensive metallographic analysis was conducted on the recovered fragments [1]. Surface damage accumulation has been observed to be very significant adjacent to fractures that lead to rod failure.…”