Stress state influence ondynamic strength and failure behaviour of tungstenheavy alloys

Abstract

A novel experimental technique was used to study pressure effects on shear stress and failure behaviour of sintered and sintered plus swaged tungsten heavy alloys under high strain rates at room temperature. Depending on the type of material and amount of superimposed pressure, different shear stress deformation behaviours were measured. Strength and failure properties are compared with values for depth of penetration and crater volumes measured in ballistic tests against semi-infinite targets. A good correlation between stress state dependent dynamic mechanical properties and ballistic results was found. Dr Krüger ([email protected]) is with Nordmetall GbR, Eibenberg, Einsiedler Str. 18h, D-09235 Burkhardtsdorf, Germany. Professor Dr Meyer is at the University of Technology Chemnitz, D-09107 Chemnitz, Germany. Mr Hofmann is at the Bundeswehr Research Institute for Materials, Explosives, Fuels & Lubricants (WIWEB), D-85435 Erding, Landshuter Str. 70, Germany. Mr Weinberger is with Israel Military Industries Ltd., P.O.B. 1044 Ramat Hasharon 47100, Israel. Manuscript received 17 December 2002; accepted 14 March 2003.