Relação entre granulometria e resistividade elétrica no aço 1045 através do ensaio não destrutivo por correntes parasitas

Abstract

In engineering, both in mechanical design and maintenance industrial equipment, it is always necessary to know what material some equipment was manufactured. In case of failures or defects in the equipment structure, it is important to investigate what the cause is and where are the defects. It is common to do destructive tests to obtain such information, and the parasitic test is one of the means that can be used. The goal of this work was establish the relation of grain size of 1045 steel and its electrical resistivity. After the realization of different thermal treatments in 12 samples of 1045 steel, prepare them metallographically, measure their grain sizes, and do the non-destructive test to obtain the values of the electrical conductivity phase angles, it was detected that the lower the grain size is, the lower is the electrical resistivity of the steel.