High Strain Rate Damage Development and Failure Mechanisms in Tungsten Heavy Alloys
Abstract
A wide range of tungsten heavy alloy microstructures was subjected to high strain rate tensile and compressive loading. It is found that there exists a critical strain for the onset of unstable shear under compressive loading, which is related to the achievement of a viable mean free path for shear band propagation between tungsten particles. The critical strain thus relates to the W-grains, and not the matrix. Similarly, high strain rate tensile strength and toughness is degraded by the inherently weak W-W interfaces in all current alloys. The key to improvement in this case, will be the achievement of matrix wetting of these surfaces, and thereby ductilizing them.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 30, 1992
- Accession Number
- ADA260856
Entities
People
- James Lankford Jr.
Organizations
- Southwest Research Institute