Dimensional Accuracy of Titanium Direct Metal Laser Sintered Parts

Access full-text files

Date

2016

Authors

Mitchell, W.F.
Lang, D.C.
Merdes, T.A.
Reutzel, E.W.
Welsh, G.S.

Journal Title

Journal ISSN

Volume Title

Publisher

University of Texas at Austin

Abstract

To address concerns regarding quality of production parts created using the Additive Manufacturing (AM) process, a study was conducted to quantify the dimensional accuracy of said parts. Fourteen AM builds were manufactured in Ti-6Al-4V material across two EOS DMLS machines (EOSINT M 280 and EOS M 290). In addition to studying the impact of machine-to-machine variability, other factors potentially impacting final dimensional accuracy were studied, including: powder state (virgin or reused); post-processing steps (heat treatment and part removal from substrate); location of part on substrate; and nominal part size. The results of the dimensional analysis showed that the individual machine itself was the dominant factor impacting dimensional accuracy. Also, a non-linear relationship between dimensional accuracy and nominal part size was identified, which would require a more complex machine calibration technique to correct.

Description

LCSH Subject Headings

Citation