If we carry out a compression test on a cylindrical specimen to, say, 50% of its original height, the stress of the work material will increase usually significantly with reduction.
The subsequent blow of the steam hammer, which left a depression in the bar and lengthened it, also reheated it in the direction of two lines in the form of a letter X.
Tungsten heavy alloys (WHAs) possess high density, strength and toughness, making them good candidates for kinetic energy penetrator applications.
When compared with depleted uranium, another material often used for kinetic penetrators, WHAs exhibit much less adiabatic shear band formation.
[3] During ballistic impact, the formation of shear bands produces a “self-sharpening” effect, aiding penetration by minimizing the surface area at the leading edge of the projectile.
When subjected to high strain rate deformation parallel to the direction of the grain elongation, adiabatic shear bands readily form and propagate along the Ni-Fe matrix phase.
The flow stress of the matrix is much lower than that of tungsten, so texturing of the microstructure provides an easier path for propagation of shear bands.