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

Abstract

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.

Authors:
 [1];  [2];  [2];  [2]
  1. (Morris) [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1491650
Report Number(s):
LLNL-JRNL-737675
Journal ID: ISSN 1355-2546; 890696
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Rapid Prototyping Journal
Additional Journal Information:
Journal Volume: 24; Journal Issue: 9; Journal ID: ISSN 1355-2546
Publisher:
Emerald Group Publishing
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Wang, Yinmin, Kamath, Chandrika, Voisin, Thomas, and Li, Zan. A processing diagram for high-density Ti-6Al-4V by selective laser melting. United States: N. p., 2018. Web. doi:10.1108/RPJ-11-2017-0228.
Wang, Yinmin, Kamath, Chandrika, Voisin, Thomas, & Li, Zan. A processing diagram for high-density Ti-6Al-4V by selective laser melting. United States. doi:10.1108/RPJ-11-2017-0228.
Wang, Yinmin, Kamath, Chandrika, Voisin, Thomas, and Li, Zan. Mon . "A processing diagram for high-density Ti-6Al-4V by selective laser melting". United States. doi:10.1108/RPJ-11-2017-0228.
@article{osti_1491650,
title = {A processing diagram for high-density Ti-6Al-4V by selective laser melting},
author = {Wang, Yinmin and Kamath, Chandrika and Voisin, Thomas and Li, Zan},
abstractNote = {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.},
doi = {10.1108/RPJ-11-2017-0228},
journal = {Rapid Prototyping Journal},
issn = {1355-2546},
number = 9,
volume = 24,
place = {United States},
year = {2018},
month = {11}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on November 12, 2019
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