Search academic texts

Information × Registration Number 0212U001694, 0107U004477 , R & D reports Title Influence investigation of electrical hydro pulse treatment on tangential stress relief within structural aluminum alloys and determination of process parameters, which provide improving material deformability popup.stage_title Head Коsеnkov Viktor Мykhaylovych, Registration Date 27-02-2012 Organization Institute of Pulse Research and Engineering popup.description2 Object of the research is the phenomenon of tangential stress relief in aluminium alloys in the process of pulse electrohydraulic (EH) stress. The purpose of the research is to determine the dependence of plastic properties of constructional aluminium alloys on the relief processes caused by the electrohydopulse stress and to detect their connection with physico-mechanical properties of materials, energy and power parametres in technological procedures of material treatment by pressure. Methods of the research - mathematical modelling, experimental research of the phenomenon of tangential stress relief in aluminium alloys in the process of electrohydropulse stressing. By the developed complex method based on Hopkinson-Kol'skiy's method, dynamic physicomechanical characteristics of aluminium alloys АМцМ, Д16АМ, 5754Т2, АМг5М, 6111Т4, 5182, АМг6БМ are investigated in the interval of deformation velocities from 300 to 1500 1/s and compression deformations to 0.3. For the first time experimental demonstrations (on macro- and microlevel) are gained of a non-equilibrium condition of aluminium alloys in the course of their biaxial deformation under the influence of the waves oscillated by an electric discharge in water. For the first time the mathematical model of tangential stress relief in the solids deformed under the influence of an electric discharge in water is developed, considering thus the whole complex of energy transformation reserved in the capacitor bank. Experimental check-up is done of the mathematical model, and essential influence of the length of the discharge channel on the efficiency of plastic deforming of a cylindrical shell is defined at reserved energy 60 kJ. Parametres and technological procedures of EH treatment at which average plastic deformations of sheet aluminium alloys can be 2.5 times greater, and nonuniformity of distribution of deformations is twice less than at static deforming. Recommendations are developed on making of technological processes of EH treatment of aluminium alloys to enhance their plasticity. Product Description popup.authors Аврамець Д.Р. Бичков В.М. Волков Г.В. Коломійцева Л.П. Сокол С.В. Солов'ян Н.І. Старков М.В. Стрелковская Л.І. Тищенко Ф.М. Швець І.С. popup.nrat_date 2020-04-02 Close