Abstract
Dynamic compaction of metal and alloy powders has been recognized as a technique capable of producing consolidated materials possessing unique mechanical properties. In the present work molybdenum powder has been consolidated by explosives to produce a residual hardness which exceeds that of conventionally processed molybdenum bars by 55 percent, and unsintered molybdenum powder extrusions by 45 percent. This high hardness has been observed only in shock-loaded molybdenum sheet. A comparison of the microstructures in explosively consolidated molybdenum powder and shockloaded molybdenum sheet materials shows a very clear distinction between them. This is illustrated in Fig. 1(a) and (b). Figure 1(a) shows the asconsolidated molybdenum powder material to be characterized by fine subgrains having an average boundary misorientation of 6°. Dark patches of dislocation tangles also occupy many of the subgrains.
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