Analysis of technological methods of minimizing residual internal stresses at slm

Abstract

Additive manufacturing (hereinafter – en. AM) is a modern set of technologies that make it possible to quickly and qualitatively create products with a unique geometry that are impossible or difficult to produce by traditional production methods. Currently, re-searchers pay attention to two major areas, namely AM quality systems and the search for new regularities in already well-known materials that were produced in a traditional way. This technology has a number of advantages for the manufacture of aerospace products, but, like all production technologies, this technology has a number of disadvan-tages and problems. Residual internal stresses are one of the features of metal materials produced by layer-by-layer fusion using SLM technology, but they can significantly affect mechanical properties and geometric parameters. Their presence is especially important for AM materials, which inevitably lead to significant internal stresses. In this regard, it is important to minimize residual stresses in the process of manufacturing parts using SLM technology. To prevent deviations in the geometry of the part, it is necessary to take into account the ratio between the density of the specific energy supplied and its absorp-tion during the process. However, it is difficult to predict the optimal technological pa-rameters and strategies for building the SLM process for polycrystalline materials, since the quality of the product depends on a large number of factors. The search for ways of preliminary assessment and the development of measures to reduce residual stresses in the manufacture of parts using SLM technology is an urgent task of modern materials science. Thus, the issue of reducing the influence of internal stresses requires a funda-mental understanding of their influence on the geometric parameters and service charac-teristics of AM materials..