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Effect of Heat Treatment on the Microstructure and Mechanical Properties of Additive Manufactured Ti-6.5Al-2Zr-1Mo-1V Alloy

Zhang, Sheng; Zhang, Yuqi; Qi, Jinshun; Zou, Zhiyi; Qian, Yuanhong

Effect of Heat Treatment on the Microstructure and Mechanical Properties of Additive Manufactured Ti-6.5Al-2Zr-1Mo-1V Alloy Thumbnail


Authors

Sheng Zhang

Yuqi Zhang

Jinshun Qi

ZHIYI ZOU Zhiyi.Zou2@nottingham.ac.uk
Research Fellow

Yuanhong Qian



Contributors

Carmine Maletta
Editor

Abstract

Ti-6.5Al-2Zr-1Mo-1V (TA15), widely used in the aerospace industry, is a medium- to high-strength, near-α titanium alloy with high aluminium equivalent value. The TA15 fabricated via laser powder bed fusion (L-PBF) normally presents a typical brittle appearance in as-built status, with high strength and low ductility. In this study, the microstructure and properties of L-PBF TA15 were engineered by various heat treatments below the β-transus temperature (1022 °C). After heat treatment, the original acicular martensite gradually transforms into a typical lamellar α + β dual-phase structure. Withannealing temperature increases, the lamellar α phase thickened with a decreased aspect ratio. Globularisation of the α grain can be noticed when annealing above 800 °C, which leads to a balance between strength and ductility. After heat treatment between 800–900 °C, the desired combination of strength and ductility can be achieved, with elongation of about 12.5% and ultimate tensile strength of about 1100 Mpa.

Citation

Zhang, S., Zhang, Y., Qi, J., Zou, Z., & Qian, Y. (2023). Effect of Heat Treatment on the Microstructure and Mechanical Properties of Additive Manufactured Ti-6.5Al-2Zr-1Mo-1V Alloy. Materials, 16(1), Article 160. https://doi.org/10.3390/ma16010160

Journal Article Type Article
Acceptance Date Dec 20, 2022
Online Publication Date Dec 24, 2022
Publication Date Jan 1, 2023
Deposit Date Mar 1, 2023
Publicly Available Date Mar 1, 2023
Journal Materials
Electronic ISSN 1996-1944
Peer Reviewed Peer Reviewed
Volume 16
Issue 1
Article Number 160
DOI https://doi.org/10.3390/ma16010160
Keywords Article, laser powder bed fusion, TA15 alloy, heat treatment, microstructure, mechanical property
Public URL https://nottingham-repository.worktribe.com/output/15924760
Publisher URL https://www.mdpi.com/1996-1944/16/1/160

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