Effect of internal gas pressure on the shock consolidation of 304 stainless steel powders

摘要

Capsules of 304 SS powders having a pre-compacted density of 67% were shock consolidated at peak pressures of 100 GPa. Initial internal N(sub 2) gas pressures from 7 (times) 10 (sup (minus)4) Pa to 0.1 Gpa were employed. However, as the internal N(sub 2) gas pressure in the powders was increased, the quality of the compacted density decreased. While it is intuitive that high internal gas pressures in porous materials do not enhance their consolidation, a greater understanding of the consolidation process and the part entrapped (intentional or unintentional) gas plays is elucidated. 12 refs., 9 figs.