Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/87489
Title: Revealing martensitic transformation and α/β interface evolution in electron beam melting three-dimensional-printed Ti-6Al-4V
Authors: Tan, Xipeng
Kok, Yihong
Toh, Wei Quan
Tan, Yu Jun
Descoins, Marion
Mangelinck, Dominique
Tor, Shu Beng
Leong, Kah Fai
Chua, Chee Kai
Keywords: 3D Printing
DRNTU::Engineering::Mechanical engineering
Electron Beam Melting
Issue Date: 2016
Source: Tan, X., Kok, Y., Toh, W. Q., Tan, Y. J., Descoins, M., Mangelinck, D., . . . Chua, C. K. (2016). Revealing martensitic transformation and α/β interface evolution in electron beam melting three-dimensional-printed Ti-6Al-4V. Scientific Reports, 6, 26039-. doi:10.1038/srep26039
Series/Report no.: Scientific Reports
Abstract: As an important metal three-dimensional printing technology, electron beam melting (EBM) is gaining increasing attention due to its huge potential applications in aerospace and biomedical fields. EBM processing of Ti-6Al-4V as well as its microstructure and mechanical properties were extensively investigated. However, it is still lack of quantitative studies regarding its microstructural evolution, indicative of EBM thermal process. Here, we report α′ martensitic transformation and α/β interface evolution in varied printing thicknesses of EBM-printed Ti-6Al-4V block samples by means of atom probe tomography. Quantitative chemical composition analysis suggests a general phase transformation sequence. By increasing in-fill hatched thickness, elemental partitioning ratios arise and β volume fraction is increased. Furthermore, we observe kinetic vanadium segregation and aluminum depletion at interface front and the resultant α/β interface widening phenomenon. It may give rise to an increased α/β lattice mismatch and weakened α/β interfaces, which could account for the degraded strength as printing thickness increases.
URI: https://hdl.handle.net/10356/87489
http://hdl.handle.net/10220/46746
DOI: 10.1038/srep26039
Schools: School of Mechanical and Aerospace Engineering 
Research Centres: Singapore Centre for 3D Printing 
Rights: © 2016 The Authors (Nature Publishing Group). This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
Fulltext Permission: open
Fulltext Availability: With Fulltext
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