Eventos Anais de eventos
COBEF 2017
Congresso Brasileiro de Engenharia de Fabricação
STUDY ON DENSIFICATION OF IRON-TIN GRADED MATERIAL OBTAINED BY SELECTIVE LASER MELTING
Submission Author:
Cleiton André Comelli , SC
Co-Authors:
Carlos Ahrens, Luiza Bertoldo Benedetti
Presenter: Cleiton André Comelli
doi://10.26678/ABCM.COBEF2017.COF2017-0195
Abstract
The manufacturing of functionally graded materials (FGM) is based on structural or compositional variation through the part. A possible technology to obtain such materials is selective laser melting (SLM), an additive manufacturing (AM) technique that offers flexibility in multiple processing parameters while processing different materials at once. One of the fields of interest includes materials with different tribological and mechanical properties. In this study, cube specimens were manufactured with varied composition and process parameters, aiming to obtain maximum consolidation in each composition of a sequential gradient between pure iron up to iron with 25% of tin. Pure iron powder, iron powder with 12,5% of tin and iron powder with 25% of tin were used to obtain specimens. The energy density was varied within the composition by changing the scan spacing, laser power and scanning speed parameters. Following this methodology, it was possible to conclude that a higher energy application produce warpage, and a lower energy level results in very porous or even non-densified specimens. Energy densities between 26J/mm3 and 198J/mm3could produce solid parts that were submitted to density analysis. The results were analyzed using scanning electron microscopy (SEM) and response surface methodology (RSM), showing the variation of density in function of the process parameters applied and the increase of density with the increase of tin added to the alloy.
Keywords
Functionally graded materials, Selective laser melting, Additive manufacturing, Iron, Tin
