A STUDY OF EXPLOSIVE FORMING SELECTED REFRACTORY METALS
Abstract
An investigation as initiated to optimize the strain rate conditions and transmission media for explosive forming of the refractor metals (1) Mo-1/2%Ti, (2) W, (3) Nb alloy Cb-74, and (4) Nb alloy CT-2WZ. e ac aterial will be in the form of 6-x6-x0.040-in. sheets. Fifteen tests are planned for each of the 3 basic materials in a unidirectional-type trough die and 5 tests of each material in a multidirectional cup die. Both dies will be mo ified to accept springs for the draw-ring assembl and an attempt will be made to evaluate the effect of draw-ring pressure on the elongation and flow of the metals. RDX and 40% dynamite will be used for the explosive charges. A review will be made of the publications concerning explosiforming transfer media in order to select 2 mediums in addition to powdered alumina. The Mo-1/2%Ti alloy will be processed at 1000 F, the Nb alloys at 800 to 100 F, and the W at 1000 F. Polar coordinate grids will be placed on each blank by the photo-resist method for elongation measurements. The metal between the grid lines will be etched to a depth of 0.0005 to 0.001 inch.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 15, 1961
- Accession Number
- AD0260972