Microlevel Numerical Modeling of the Shock Wave Induced Consolidation of Metal Powders
Dynamic consolidation of powders using shock waves is a promising technique for obtaining high strength materials. It has been demonstrated experimentally that consolidated materials which retain the desirable nonequilibrium properties of the initial powder can be produced using this approach, e.g. Flinn et al.  and Korth et al. . It has been suggested by Raybould , that the consolidation process is achieved as a result of very short duration high energy deposition at particle surfaces through various mechanisms such as rapid plastic deformation and friction between particles. Because of this selective heating at particle surfaces, it is possible to obtain densification and particle bonding without subjecting the bulk material to high temperatures which create undesirable microstructural changes. To achieve a better exploitation of the dynamic consolidation technique, it will be necessary to obtain a greater understanding of the important physical mechanisms involved and the dynamic behavior of the particles during compaction.
KeywordsInterstitial Region Dynamic Compaction Idaho National Engineer Laboratory Velocity Flyer Material Strength Property
Unable to display preview. Download preview PDF.
- 1.J. E. Flinn et al., “Dynamic Consolidation of Aluminum Powders,” this proceedings.Google Scholar
- 2.G. E. Korth et al., 1984, “Dynamic Consolidation of Rapidly Solidified Type 304 SS Powders,” Explomet’85: International Conference on Metallurgical Applications of Shock Wave and High-Strain-Rate Phenomena, Portland, Oregon, July 28–August 1 (1985).Google Scholar
- 3.D. Raybould, “The Production of Strong Parts and Non-Equilibrium Alloys by Dynamic Compaction,” Shock Waves and High-Strain-Rate Phenomena in Metals, edited by M. A. Meyers and L. E. Murr, Plenum, New York (1981).Google Scholar
- 4.R. A. Berry and R. L. Williamson, “A Multiphase Flow Model for the Shock Induced Consolidation of Metal Powders,” this proceedings.Google Scholar
- 5.S. L. Thompson, CSQII - An Eulerian Finite Difference Program for Two-Dimensional Material Response Part 1. Material Sections, SAND 77 - 1339 (1979).Google Scholar
- 6.S. L. Thompson, 1972, Improvements in the CHARTD Radiation-HydrodynamicCode III: Revised Analytic Equations of State, SC-RR-71-0714 (1972).Google Scholar
- 7.R. L. Williamson and R. A. Berry, Microlevel Numerical Modeling of the Shock Wave Induced Consolidation of Metal Powders, Idaho National Engineering Laboratory Report, EGG-RST-6923, in progress.Google Scholar