Research on Melted and Rapidly Solidified Layer on the Surface of Crater Penetrated by Long Tungsten Rod

doi:10.3969/j.issn.1000-1093.2015.07.003

Abstract

Abstract: A thin surface layer, called melted and rapidly solidified layer, is formed when tungsten long rod penetrates into armor at high velocity. When the 30CrMnMo target is shot by a small caliber long rod armor piercing projectile at 0°angle, a crater is formed on the target. In order to investigate the morphology characteristics and forming mechanism of MRSL, the surface of the crater is observed by scanning electron microscopy and analyzed by energy spectrum. LS-DYNA is used to simulate the temperature field of the interaction area between penetrator and target. It is shown that MRSL consists of W, Ni and Fe elements, which are contained in long rod material, and Fe, Cr and Mn elements, which are contained in target material. In MRSL, tungsten grains have two kinds of size: the big one is of long and flat shape, and its length is in the range from several micrometers to dozens of micrometers; the small one is dispersed in matrix with 100~400 nm in diameter. The mass consumption of long rod head is happened in the form of “melted and broken”.

Key words: ordnance science and technology, armor piercing, interaction area between penetrator and target, melted and broken mass consumption, melted and rapidly solidified layer

CLC Number:

LUO Rong-mei， HUANG De-wu, YANG Ming-chuan, HUANG Hai, LI Fu-ying. Research on Melted and Rapidly Solidified Layer on the Surface of Crater Penetrated by Long Tungsten Rod[J]. Acta Armamentarii, 2015, 36(7): 1167-1175.

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