Mathematical model of the heat interaction between the metal matrix and the reinforcement phase during the production of Metal Matrix Composites

This present paper is relevant to the establishment on mathematical model of the heat interaction between the metal matrix (liquid phase- Cu) and a reinforcement (solid- Fe) phase, during the production of the Metal Matrix Composites (MMCs) by the method of capillary molding. In this case is substituted heat object with a mathematical model drawn up and grounded to investigation of the original behavior and properties, clarifies temperature fields in bodies. The established simulation clarifies temperature fields and the causal liaison between the metal matrix and the reinforcement phase in the formation of the macro and microstructure at the time of production of MMCs. Casting process simulation is an approved method for the optimization of the methods of casting technology. The basic opportunities, ideology and structure of the software "MATLAB FEA" are introduced to simulate casting technology. The possibilities of the product are illustrated by the results obtained from a computer simulation by the technical process of the production of MMCs.

Trial of Heat Inactivation of Selected Viruses Following Irradiation

Four selected viruses were irradiated in ground pork with an electron beam at absorbed doses of 4.4 to 5.27 kG. Irradiated and nonirradiated viruses were heated at four temperatures for four time intervals and assayed for surviving virus. Data were examined for evidence of irradiation-heat interaction to determine whether absorbed irradiation would sensitize virus so that a lesser amount of heat would be required for inactivation. It was determined that irradiation does not increase lability to heat to a level that has practical application in virus inactivation.