Effect of the Impulsive Magnetic Field in the Course of Crystallization of Aluminum Alloys on Their Physical Properties

Abstract

We present the results of experimental investigation of the electric resistance and thermal conductivity of A356.0 and A413.1 aluminum alloys crystallized in impulsive magnetic fields. We show that the electric resistance of alloys processed by magnetic fields increases and their thermal conductivity decreases as compared with the initial state. We give a qualitative explanation of changes in the electric resistance and thermal conductivity of the analyzed alloys. The obtained temperature dependences of specific electric resistance do not contradict the existing theoretical concepts about the nature of the phenomenon of electron transfer in metals below and above the Debye temperature. The temperature dependences of the thermal conductivity for the analyzed alloys cannot be explained from the viewpoint of the quantum theory of heat transfer by the conductivity electrons for pure metals. In this connection, it is assumed that the thermal conductivity of alloys is determined not only by conductivity electrons, but also by the phonon component.