EXPLOSIVE HARDENING OF IRON AND LOW-CARBON STEEL
NAVAL WEAPONS LAB DAHLGREN VA
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The degree and depth of shock hardening in iron and low-carbon steel plates was experimentally determined by detonating C-3 explosive against the plates. Final hardness levels were not strongly influenced by the magnitude of the pressure above the critical value of 130 kilobars or by explosive thickness or plate thickness, but were dependent upon the original hardness of the plate. The relative widths of the two hardness plateaus through the plates were found to depend upon explosive thickness, plate thickness, and applied pressure a simple explanation for this dependence is presented in terms of the interac tion of two shocks in the metal. The relationship of hardness and tensile strength was found to be about the same whether hardening was done explosively or by cold-working.
- Metallurgy and Metallography