Abstract
Abstract The study presents the results of research aimed at the construction of a model of the relationship between the physical properties of metal and the types of toughening treatment and modifiers used in the modification of BA1044 alloy. Samples of melts were subjected to four variants of the heat treatment and to five types of modification. Studies of the samples consisted in measurements of five physical parameters. Consequently, it was necessary to seek a relationship between the nine input parameters and five output parameters. With this number of the variables and a limited number of samples, searching for the relationships by way of statistical methods was obviously impossible, so it was decided to create an approximate model through the use of fuzzy logic. This study describes the process of creating a model and presents the results of some simulation experiments that confirm the validity of the correct approach.
Highlights
Within the framework of long-lasting research of cast aluminium bronzes, recently the effect of heat treatment of BA1044 alloy modified with calcium carbide and C + Ca additives has been studied
With large number of the variables and a limited number of samples - search for the relationships and creating an approximate model becomes nearly impossible
Some rules are presented for the construction of a fuzzy model to determine the application of a heat treatment and modification for an improvement of the material parameters (BA1044 alloy)
Summary
Within the framework of long-lasting research of cast aluminium bronzes, recently the effect of heat treatment of BA1044 alloy modified with calcium carbide and C + Ca additives has been studied.With large number of the variables and a limited number of samples - search for the relationships and creating an approximate model becomes nearly impossible.2. Within the framework of long-lasting research of cast aluminium bronzes, recently the effect of heat treatment of BA1044 alloy modified with calcium carbide and C + Ca additives has been studied. With large number of the variables and a limited number of samples - search for the relationships and creating an approximate model becomes nearly impossible. The aim of the study was to create a model of relationship between the properties of metal and the type of heat treatment and modification, mainly to determine which one of these processes has the most significant impact on the examined mechanical properties. The results of the investigations were collected on 72 samples cast from the BA1044 alloy. Additional division is in respect of the heat treatment type, and here the following variants can be distinguished:
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