AccScience Publishing / MSAM / Volume 4 / Issue 1 / DOI: 10.36922/msam.8332
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ORIGINAL RESEARCH ARTICLE

Effect of in situ electromagnetic field manipulation on the microstructure and hardness of titanium alloy during laser melting deposition

Chang Liu1,2 ,  Yongjian Wu1,2 ,  Jian Zhou1,2 ,  Yan Wen1,2* ,  Liqiang Wang3 ,  Lechun Xie1,2*
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1 Hubei Key Laboratory of Advanced Technology for Automotive Components, Wuhan University of Technology, Wuhan, Hubei, China
2 Hubei Collaborative Innovation Center for Automotive Components Technology, Wuhan University of Technology, Wuhan, Hubei, China
3 State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, China
MSAM 2025, 4(1), 8332 https://doi.org/10.36922/msam.8332
Submitted: 31 December 2024 | Accepted: 23 January 2025 | Published: 18 March 2025
© 2025 by the Author(s). This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution 4.0 International License ( https://creativecommons.org/licenses/by/4.0/ )
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Abstract

The electromagnetic field is a non-contact physical field that can influence the internal flow of the melt pool and regulate the microstructure properties of alloy through electromagnetic force during laser melting deposition (LMD). This study proposes a 3D numerical model of LMD Ti-6Al-4V coupled with an electromagnetic field and investigates the effect of the electromagnetic field on the fluid dynamics of the melt pool during LMD. The results indicated that a steady electromagnetic field can suppress the internal flow of the melt pool. In an electromagnetic field of 39.40 mT, the length of β-columnar grains significantly decreases from 490 to 354 μm, resulting in fragmentation and equiaxed tendencies, thereby enhancing the hardness of the deposition layer. This study provides a new method for in situ manipulation of the microstructure and mechanical properties of titanium alloys during LMD.

Keywords
In situ manipulation
Electromagnetic field
Laser melting deposition
Ti-6Al-4V
Molten pool
Funding
This work was financially supported by the Major Research Plan of the National Natural Science Foundation of China (Grant No. 92266102), National Natural Science Foundation of China (No. 52271135), Innovation Funding Project of National Engineering and Research Center for Commercial Aircraft Manufacturing (COMAC-SFGS-2022-1871), Overseas Expertise Introduction Project for Discipline Innovation (B17034), and Innovative Research Team Development Program of Ministry of Education of China (IRT_17R83).
Conflict of interest
Both Lechun Xie and Liqiang Wang serve as the Editorial Board Members of the journal but were not involved in any way (directly or indirectly) in the editorial and peer-review process conducted for this paper. Other authors declare they have no competing interests.
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Materials Science in Additive Manufacturing, Electronic ISSN: 2810-9635 Published by AccScience Publishing
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