Search

In order to improve the workability of alloys CuNiSiCr a study of the conditions of homogenizing heat treatment and assessed their behavior through mechanical tests traction. Standardized tests were conducted at 850, 950 and 1025°C with time-keeping 0, 1.5 and 6 hours and a subsequent double aged. It was observed that the optimum workability for the alloys occurs at the 850°C and 6 hours. This improvement in ductility is associated with the presence of a microstructure containing a small amount of discontinuous precipitates in limiting grain and rounded precipitates inside the grains. It is concluded that the homogenizing heat treatment is and adequate method to increase the workability of the alloy. [ABSTRACT FROM AUTHOR]

In this paper we study the dependence of magnetic Barkhausen noise (RMB) with the various microstructural parameters of the steel AISI / SAE 1005, 1020, 1045, 1070; Determining the dependence of various parameters of the signal RMB as are the power spectral density, the amplitude of the peak, the noise envelope and shape of the peaks of noise, with the size grain. Besides using a model to explain the dependence of the above parameters RMB with the grain size. [ABSTRACT FROM AUTHOR]