چکیده مقاله
Selective laser melting SLM is an additive manufacturing technique in which functional, complex parts can be created directly by selectively melting layers of powder This process is characterized by highly localized high heat inputs during very short interaction times and will therefore significantly affect the microstructure For the successful production of parts with Laser Beam Melting technology support structures are essential Their main functions are to support overhanging structures, dissipate the heat generated during the process, and minimizing geometrical distortions caused by internal stresses If we want to produce a part that is overhanging feature, by the process of selective laser melting without the use of support structures, in some areas where thepart is hung, scanning is performed on the previous layer which is powder and if a support structure is used, the scan is performed on a layer that is solid In this study, the effect of powder and solid properties of the substrate as well as the effect of changing the substrate material on temperature distribution, thermal gradient and cooling rate were investigated The results of the simulation show that the changing the substrate material from AlSi10Mg to Al2024 and change the properties of the substrate from powder to solid reduces the temperature and increases the cooling rate This is because the thermal conductivity of Al2024 is higher than AlSi10Mg and the heat transfer through the thermal conductivity in the solid is more than the powder
کلیدواژهها
نویسندگان
Negin Amani
Master Student of Welding Engineering, Department of Materials Engineering, Tarbiat Modares University
Reza Miresmaeili
Associate Professor, Department of Materials Engineering, Tarbiat Modares University,
Mobin Karami
Master Student of Welding Engineering, Department of Materials Engineering, Tarbiat Modares University
شیوه ارجاع
Amani, Negin and Miresmaeili, Reza and Karami, Mobin,1400,A simulation for the effect of substrate on temperature distribution and thermal gradients in selective laser melting,4th International Conference on Welding and Non Destructive Testing & 22nd National Conference on Welding & Inspection & 11th National Conference on NDT,Isfahan
ارائهشده در
مجموعه مقالات چهارمین کنفرانس بین المللی جوشکاری و آزمایش های غیرمخرب و بیست و دومین کنفرانس ملی جوش و بازرسی و یازدهمین کنفرانس ملی آزمایش های غیرمخرب18 اسفند 1400 · اصفهان