MATEC Web Conf.
Volume 321, 2020The 14th World Conference on Titanium (Ti 2019)
|Number of page(s)||7|
|Section||Additive and Near Net Shape Manufacturing|
|Published online||12 October 2020|
Process variation in Selective Laser Melting of Ti-6Al-4V alloy
1 Monash Centre for Additive Manufacturing, 15-17 Normanby Rd, Notting Hill, VIC 3168, Australia.
2 Department of Mechanical and Aerospace Engineering, Monash University, Clayton, VIC 3168, Australia
3 Department of Materials Science and Engineering, Monash University, Clayton, VIC 3168, Australia
The present work explores the variation in Ti-6Al-4V part quality introduced by the key process operations of Selective Laser Melting (SLM) process, the recoating, the gas flow, and the laser beam irradiation. Novel specimens and experiments were designed to characterize the differences in surface quality and thermal history as a function of part geometry and location on the build platform. The variation in the roughness of inclined surfaces shows a clear dependency on the laser incidence angle and the influence of gas flow on process by-products. The direction in which the laser beam traverse across the build area with respect to the gas flow direction also affects the surface quality. Thermal profiles were recorded by attaching thermocouples to the surface of the built part with various geometries. The measured temperature profiles show intense local fluctuations due to the rapid movement of the laser beam. The parts also experience a continuous heat treatment throughout the SLM process due to the low effective conductivity of the powder bed and continuous heat input by the laser.
© The Authors, published by EDP Sciences, 2020
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.