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Production of Single Tracks of Ti-6Al-4V by Directed Energy Deposition to Determine the Layer Thickness for Multilayer Deposition
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Microstructure and Strength of Ti-6Al-4V Samples Additively Manufactured with TiC Heterogeneous Nucleation Site
Yoshimi Watanabe1, Shintaro Yamada1, Tadachika Chiba1
1Department of Physical Science and Engineering, Nagoya Institute of Technology, Nagoya 466-8555, Japan.
Materials (Basel, Switzerland)
|September 9, 2023
Summary
Adding titanium carbide (TiC) particles to titanium alloy (Ti-6Al-4V) powder during additive manufacturing significantly suppresses gas pores and balling. This advancement improves the quality of 3D-printed metal components.
Area of Science:
- Materials Science
- Additive Manufacturing
- Metallurgy
Background:
- Additive Manufacturing (AMed) of Ti-6Al-4V is crucial for aerospace and biomedical applications.
- Optimizing AMed processes to enhance material integrity and reduce defects is an ongoing challenge.
- Gas pores and balling are common defects in AMed Ti-6Al-4V, compromising mechanical properties.
Purpose of the Study:
- To investigate the effect of TiC heterogeneous nucleation site particles on the additive manufacturing of Ti-6Al-4V.
- To assess the suppression of defects like gas pores and balling in AMed Ti-6Al-4V with TiC addition.
- To analyze the microstructural and tensile properties of modified Ti-6Al-4V samples.
Main Methods:
- Fabrication of Ti-6Al-4V samples using an EOS M 290 machine under reduced power.
- Inclusion of TiC heterogeneous nucleation site particles in the metallic powder.
- Microstructural analysis and tensile testing of the produced samples.
- Single-track tests to evaluate defect suppression mechanisms.
Main Results:
- The addition of TiC particles effectively suppressed the formation of gas pores and balling during the additive manufacturing of Ti-6Al-4V.
- Reduced power conditions were explored in conjunction with TiC particle addition.
- Microstructure and tensile behavior were characterized for both modified and unmodified samples.
Conclusions:
- TiC heterogeneous nucleation site particles are effective in mitigating common defects in additively manufactured Ti-6Al-4V.
- This approach offers a viable strategy for improving the quality and reliability of 3D-printed titanium components.
- Further research can explore variations in TiC content and other processing parameters.
