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Influence of Direct Energy Deposition Parameters on Ti–6Al–4V Component’s Structure-Property Homogeneity

1
Titanium Department, Advanced Metals Division, Korea Institute of Materials Science, Changwon 51508, Korea
2
Department of Materials Science and Engineering, Pusan National University, Busan 46241, Korea
3
School of Materials Science and Engineering, Gyeongsang National University, Jinju 52828, Korea
*
Authors to whom correspondence should be addressed.
These authors contributed equally to this paper.
Academic Editor: Antonio Mateo
Metals 2021, 11(6), 887; https://doi.org/10.3390/met11060887
Received: 26 April 2021 / Revised: 12 May 2021 / Accepted: 26 May 2021 / Published: 28 May 2021
Ti–6Al–4V alloy is a typical 3D printing metal, and its application has been expanded to various fields owing to its excellent characteristics such as high specific strength, high corrosion resistance, and biocompatibility. In particular, direct energy deposition (DED) has been actively explored in the fields of deposition and the repair of large titanium parts. However, owing to the complicated thermal history of the DED process, the microstructures of the fusion zone (FZ), heat-affected zone (HAZ), and base metal (BM) are different, which results in variations of their mechanical characteristics. Therefore, the process reliability needs to be optimized. In this study, the microstructure and hardness of each region were investigated with respect to various DED process parameters. An artificial neural network (ANN) model was used to correlate the measured characteristics of the FZ, HAZ, and BM of Ti–6Al–4V components with the process parameters. The variation in the mechanical characteristics between the FZ, HAZ, and BM was minimized through post-heat treatment. Heat treatment carried out at 950 °C for 1 h revealed that the microstructure and hardness values throughout the component were homogeneous. View Full-Text
Keywords: direct energy deposition; Ti–6Al–4V alloy; melt pool geometry; artificial neural network; heat treatment direct energy deposition; Ti–6Al–4V alloy; melt pool geometry; artificial neural network; heat treatment
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MDPI and ACS Style

Lee, C.H.; Narayana, P.L.; Choi, S.-W.; Reddy, N.S.; Kim, J.H.; Kang, N.; Hong, J.-K. Influence of Direct Energy Deposition Parameters on Ti–6Al–4V Component’s Structure-Property Homogeneity. Metals 2021, 11, 887. https://doi.org/10.3390/met11060887

AMA Style

Lee CH, Narayana PL, Choi S-W, Reddy NS, Kim JH, Kang N, Hong J-K. Influence of Direct Energy Deposition Parameters on Ti–6Al–4V Component’s Structure-Property Homogeneity. Metals. 2021; 11(6):887. https://doi.org/10.3390/met11060887

Chicago/Turabian Style

Lee, Chan H., P. L. Narayana, Seong-Woo Choi, N. S. Reddy, Jae H. Kim, Namhyun Kang, and Jae-Keun Hong. 2021. "Influence of Direct Energy Deposition Parameters on Ti–6Al–4V Component’s Structure-Property Homogeneity" Metals 11, no. 6: 887. https://doi.org/10.3390/met11060887

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