Press forming

Tetiyl. 2,4,6-Trinitrophenylmethylm tramine (tetryl) was used ia pressed form, mostly as a booster explosive and as a base charge ia detonators and blasting caps because of its sensitivity to initiation by primary explosives and its relatively high energy content. Properties are presented ia Table 11 (173). Batch and continuous processes for the production of tetryl have been developed. Tetryl is no longer used ia the United States and has been replaced by RDX (174-178). 

Ammonium picrate (AP) is used only where a high explosive is required that is particularly iasensitive to shock. It has been employed ia pressed form primarily as a burster ia aaval projectiles for armor peaetratioa. The compouad is very stable and does not form sensitive metallic salts. Its explosive... 

Bricks may be extmded or dry-pressed on mechanical or hydraulic presses. Formed shapes may be burned before use, or in the case of pitch or resin/chemically bonded bricks, may be cured (tempered) at a low temperature. 

Property Hand lay-up mat laminate Press formed mat laminate Fine square woven cloth laminate Rod from rovings... 

The backward press forming method was applied to produce the cups from the investigated alloys at temperature 523 K at a small deformation rate. The velocity of the displacement of the stamp was in the range of 1-10 mm/min. 

The average deformation and deformation rate in the wall of a moulded piece in the backward press forming are ... 

The deformation rate in the synchronous press forming is much greater than in the backward press forming... 

In the press forming of cups from the investigated alloys the backward press forming method was applied. 

An electrolytically deposited and a press-formed electrode prepared from equimolar ratios of Cu (32 wt%) and CuCE (67 wt%) and 1 wt% polyethylene binder were used. 

E. C. Sanderson, A. W. Brewer, R. W. Krenzer, G. Krauss, Dislocation Substructures in High-Energy-Rate-Forged and Press-Formed 21-6-9 Stainless Steel , Rockwell International Atomics International Division, Rocky Flats Plant, P. O. Box 464, Golden, CO 80401, RFP-2743, July 24, 1978. 

Iodine trichloride forms long citron-yellow needles, and also large reddish-brown rhombic plates. The sp. gr. at 15° is 3T17 (A. Christomanos). This compound melts in a sealed tube under the press, of its own vapour at 101° and 16 atm. press, forming a reddish-brown liquid which freezes to crystals of the same colour. The citron-yellow crystals are obtained by sublimation. The differences in colour and appearance led W. Stortenbeker to say that the trichloride is dimorphous. The crystals readily decompose in air, but they can be preserved unchanged in an atm. 

Diamino-N. N,nKn1 -tetrametbyl)-benzene, stable oil when dry, having a camphor-like odor, bp 215-16° at 759mm press forms cryst salts (Ref 1)... 

Dichloroacetylene or Dlchloroethyne (called Dichloracetylen or Dichlorathin in Ger), Cl.ClC.Cl mw 94.93 oil, fr p -64 to -68° bp 32-33° at 748 mm press, forms ndls at temps below its fr p explodes on contact with air d 1.261 at 20° n 1.4279 at 20° miscible with many org solvs can be stored at RT in ether soln, with which it forms an addn compd. Dichloroacetylene is narcotic poisonous, causing nerve eye symptoms... 

An important factor in the selection of a polymer is its availability in a suitable form. In this respect the thermoplastics have an advantage in that they can be injection moulded, and nylon can also be cast or press-formed from powder by sintering. 

TNT may vary in color from a pale yellow to an orange. Its color is influenced by time and by the purity of the explosive. TNT is crystalline and is issued in pressed form. It can be steam melted. It burns at 266° F. Small quantities (up to 1 pound) of it may be burned in open areas without fear of detonation. 

This applies to low deformation rates in the steady state at very high stresses and deformation rates, for example during press-forming, gfass may show non-Newtonian behaviour or the continuity may be impaired by brittle fracture. 

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