DEFINITION OF LOWER BOUNDARY IN REGION OF STRENGTH JOINTS AT HIGH-RATE OF STRAIN OF METALS

Explosive weldability windows were determined by means of experiments to obtain bimetallic joints with strength not less than that of the we aker material. To construct the weldability window correctly the influ ence of factors not previously taken into account has been investigate d. These factors are the dependence of the polytropic exponent of the explosion products on detonation velocity, the periphery distortions u nder casting of the plate and the influence of material strength on th e plate collision geometry. Mathematical relations to calculate the lo wer boundary of the weldability window, the optimum residual pressure, the dimensions of the zone of periphery effects and the polytropic ex ponent have been developed.