Onset and Nature of Fracture of Uniaxially Compressed Gun Propellants. A Small Angle Neutron and X-ray Scattering Study
Abstract
To understand the mechanism of fracture, the response of two propellant formulations, M30 and M43, has been studied. Specimens were prepared from extruded solid strands and uniaxially deformed at about 100 1/s to 2, 5, 10 and 20 percent strain. Axial and ortho-axial sections of these damaged specimens were investigated with small angle neutron and X-ray scattering. Monochromatic beams irradiated the specimens and the resulting scattering patterns were recorded as a function of scattering angle with a two-dimensional detector. These measurements were performed using instruments at the National Institute of Standards and Technology (NIST). The scattering from both propellants showed substantial asymmetry and dramatic changes as a function of strain. These results directly reflect the surface area that exists between regions of different materials and also any new surface area created by fracture. Interpretation of the measurements has for the first time revealed important aspects of the mechanism of fracture failure in these propellants. Mechanical response, Propellants, Bed, M30, M43, X rays, Surface profile, Fracture damage, Scattering, Neutrons, Small angle, X ray scattering.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1993
- Accession Number
- ADA268882
Entities
People
- John D. Barnes
- Robert J. Lieb
- Samuel F. Trevino
Organizations
- United States Army Research Laboratory