A processing diagram for high-density Ti-6Al-4V by selective laser melting

Wang, Yinmin (Morris); Kamath, Chandrika; Voisin, Thomas; Li, Zan

doi:10.1108/RPJ-11-2017-0228

Title: A processing diagram for high-density Ti-6Al-4V by selective laser melting

Journal Article · 11 November 2018 · Rapid Prototyping Journal

DOI: https://doi.org/10.1108/RPJ-11-2017-0228 · OSTI ID:1491650

Wang, Yinmin (Morris) ^[1]; Kamath, Chandrika ^[1]; Voisin, Thomas ^[1]; Li, Zan ^[1]

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Density optimization is the first critical step in building additively manufactured parts with highquality and good mechanical properties. In earlier work, we developed an approach that combines simulations and experiments to identify processing parameters for high-density parts. Here we present the results for Ti-6Al-4V using the laser powder-bed-fusion technique. We show how simple, but approximate, simulations are used to design parameters for a limited set of single track experiments. The resulting melt-pool characteristics are then used to identify processing parameters for high-density pillars. From these experimental data, a processing diagram based on the normalized energy density concept is constructed, illustrating an optimized processing window for high- or low-density samples. Excellent mechanical properties are obtained for Ti-6Al-4V samples built from the optimized window. We discuss the limitations and implications of the processing diagram on the microstructure and mechanical properties.

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Research Organization:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1491650

Report Number(s):: LLNL-JRNL-737675; 890696

Journal Information:: Rapid Prototyping Journal, Journal Name: Rapid Prototyping Journal Journal Issue: 9 Vol. 24; ISSN 1355-2546

Publisher:: Emerald Group PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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