首页|Composition fine-tuning for directed energy deposition of Ti-6Al-4V
Composition fine-tuning for directed energy deposition of Ti-6Al-4V
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NSTL
Elsevier
Current research activities involving the laser directed energy deposition (DED) of Ti-6Al-4V alloy focus on its microstructure and performance. This paper details an approach for fine-tuning the content of Al and V during DED Ti-6Al-4V and explores a heat treatment strategy to enhance mechanical properties. A Ti-6Al-4V feedstock powder was adapted to provide the basis of Ti-5.6Al-3.8V, Ti-5.3Al-3.6V, and Ti-5.0Al-3.4V alloys. The effect of alloy composition on tensile properties of DED these alloys were determined. It was confirmed that the tensile properties of DED Ti-5.6Al-3.8V and Ti-5.3Al-3.6V alloys exceeded those of forging standard of Ti-6Al-4V, while the tensile strength of DED Ti-5.0Al-3.4V was lower than the forging standard of Ti-6Al-4V due to coarsened alpha laths in the prior beta grains. The changes to microstructure and tensile properties of DED Ti-5.6Al-3.8V and Ti5.3Al-3.6V alloys after heat treatment were analyzed, and the results showed that the elongation of the DED Ti-5.3Al-3.6V after heat treatment was significantly improved, from 11.3%-17.2%, while its tensile strength slightly decreased 1.7 %. The results are expected to guide the fabrication of DED near Ti-6Al-4V alloy to produce products with high ductility at a minimal compromise in ultimate tensile strength.
Element fine-tuningNear Ti-6Al-4VDirected energy deposition (DED)Heat treatmentMicrostructure evolutionProperties improvement
Zhang, Fengying、Wang, Kun、Li, Yao、Chen, Yongnan、Yang, Meng、Wang, Meng、Clare, Adam T.
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Changan Univ, Sch Mat Sci & Engn, Xian 710064, Peoples R China
Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
Univ Nottingham, Fac Engn, Adv Component Engn Lab, Nottingham NG7 2RD, England
NSTL
Elsevier
