Development of Fine-Grained, Ductile Tungsten Alloys for Armor/Anti-ArmorApplication

摘要

The objective of this program has been to develop and enhance the ductility oftungsten-based materials at high strain rates through the control of microstructural parameters such as grain size, distribution of phases, and texture. The technical basis for this objective is the close relationship between fine-structure and extended plasticity in metals and ceramics. To obtain a fine and equiaxed grain structure in tungsten-based materials, a number of processing routes have been evaluated under this program. Based upon a critical evaluation available processing schemes, four methods were selected to produce materials for detailed study. These processing methods included arc casting and thermomechanical processing of tungsten-based binary alloys, chemical vapor deposition, liquid phase sintering and consolidation of ultrafine powder.