Abstract
A technique for shock consolidation of powders was developed. This technique uses the cylindrical geometry with two co-axial tubes. The powder is contained in the internal tube. The external tube is surrounded by the explosive charge, which is detonated at one end; this external tube acts as a flyer tube, impacting the internal tube. This technique generates pressures in the powder that can be several times higher than the ones generated by the single-tube technique. The main advantage of this technique is that it allows the use of low detonation-velocity explosives for consolidating hard powders. The lower detonation-velocity explosives minimize cracking of compacts. Significant improvements in compact quality were obtained in nickel-base superalloys, titanium alloys and aluminum-lithium alloys.
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