Akademik Veri Yönetim Sistemi
6th International Congress on 3D Printing (Additive Manufacturing) Technologies and Digital Industry, Bucuresti, Romanya, 23 - 25 Kasım 2022, ss.10-11, (Özet Bildiri)
The selective laser melting (SLM) method, in which complex
three-dimensional parts can be created by selectively melting the powders in
the desired location with the laser beam, is one of the most prominent metal
additive manufacturing methods. Since the SLM method is based on the physical phenomena
of and laser-matter interaction and thermal manufacturing, the temperature
distribution caused by laser directly affects physical, microstructural, and dimensional
properties of parts. In this research Finite Element Models (FEM) were
established to predict temperature distribution of
the build part. The moving Gaussian heat source is modeled to simulate the
laser beam incident on the powder surface. The
analyses have been conducted by using COMSOL software while taking the conduction,
convection and radiation phenomena into account. To investigate the effect of
process parameters on thermal distribution, varied laser powers and scanning
speeds were used while beam diameter and powder layer thickness were kept
constant. The results show that the dimension of the melt pool is significantly
affected by laser energy density. Additionally, the reported negative impacts
are addressed, including irregular melt pool formation, balling, and porosity. At
the conclusion, recommendations and future works regarding how to employ the
optimal parameters are provided.