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Selective laser melting of a 316L stainless steel

Grant number: 18/16898-0
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): December 01, 2018
Effective date (End): October 31, 2019
Field of knowledge:Engineering - Materials and Metallurgical Engineering
Principal Investigator:Piter Gargarella
Grantee:Riccardo Augusto Moreira Montuori
Home Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
Associated research grant:16/11309-0 - The study, development and application of a hybrid process: Additive Manufacturing (AM) plus High Speed Machining/Grinding (HSM/G), AP.TEM

Abstract

Selective Laser Melting (SLM) is an additive manufacturing process through which a part is built layer by laser. This method is used to fabricate products with complex shapes and customized density as prosthesis, airplane and car structural parts, molds and dies. The first step to fabricate a product by SLM is to optimize process parameters in order to produce parts with high relative density and free of critical structural defects. Every combination of raw material and SLM machine has its own optimum process parameters. This project aims to optimize the process parameters for a 316L stainless steel, which will be used to fabricate turbine blades. Samples with geometry 5x5x10 mm will be fabricated using different laser power, laser scanning speed, scanning strategy and hatching. The density of these samples will be measured by Archimedes' method and those with higher density will be characterized by X-ray diffraction, optical and electron scanning microscopy, differential scanning calorimetry and microhardness.