Investigation of temperature cycles by real experiment and numerical simulation of welded joints from austenitic steel and aluminium

Abstract

Various research methods are used in the field of scientific research. The most frequently used methods are real experiment and computer modeling. A real experiment requires equipping the laboratory with very expensive equipment. The implementation of experiments in laboratories requires knowledgeable professional personnel to operate the devices. Therefore, when investigating phenomena, the real experiment is gradually being replaced by a numerical experiment using computer technology. Computer modeling with appropriate software provides convenient investigation of technical phenomena in various areas of technological processes. Realization of experiments by computer modeling is more flexible when solving technical processes. The content of the article is a description of the investigation of temperature cycles. The experiment described in this paper focused on measuring the temperature cycles of the butt and fillet welds made of austenitic steel and aluminum. The temperature cycles were investigated via a real experiment and modelling: 1/under laboratory conditions, measured using thermocouples located in the heat-affected zone (HAZ), 2/by numerical experiment performed in the ANSYS program using FEM. Numerical simulation was used to investigate the welding process. When modeling the temperature cycles, we compared the calculated temperatures in the nodes of the model, which corresponded to the places where the thermocouples were placed in the real experiment. Results from both experiments are shown graphically.