Effect of laser remelting on surface morphology and mechanical properties of laser deposition manufactured thin-walled Ti-6Al-4V alloy
ISSN: 1355-2546
Article publication date: 30 July 2024
Issue publication date: 27 August 2024
Abstract
Purpose
This paper aims to systematically investigate the effect of laser remelting on the surface morphology and mechanical properties of laser deposition manufactured thin-walled Ti-6Al-4V alloy.
Design/methodology/approach
Thin-walled Ti-6Al-4V samples were prepared by laser deposition manufacturing (LDM) method and subsequently surface-treated by laser remelting in a controlled environment. By experiments, the surface qualities and mechanical properties of LDM Ti-6Al-4V alloy before and after laser remelting were investigated.
Findings
After laser remelting, the surface roughness of LDM Ti-6Al-4V alloy decreases from 15.316 to 1.813 µm, hard and brittle martensite presents in the microstructure of the remelted layer, and the microhardness of the laser remelted layer increases by 11.39%. Compared with the machined LDM specimen, the strength of the specimen including the remelted layer improves by about 5%, while the elongation and fatigue life decrease by about 72.17% and 64.60%, respectively.
Originality/value
The results establish foundational data for the application of laser remelting to LDM thin-walled Ti-6Al-4V parts, and may provide an opportunity for laser remelting to process the nonfitting surfaces of LDM parts.
Keywords
Acknowledgements
The authors gratefully acknowledge the financial support from the National Key Research and Development Program of China (Grant No. 2021YFC2801904) and International S&T Cooperation Program of Liaoning Province (Grant No. 2023JH2/10700024).
Data availability statement: The data that support the findings of this study are available from the corresponding author upon reasonable request.
Funding: The work was supported by the National Key Research and Development Program of China (Grant No. 2021YFC2801904) and International S&T Cooperation Program of Liaoning Province (Grant No. 2023JH2/10700024).
Conflict of interest: The authors declare that there are no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
Citation
He, B., Tan, J., Yang, G., Yi, J. and Wang, Y. (2024), "Effect of laser remelting on surface morphology and mechanical properties of laser deposition manufactured thin-walled Ti-6Al-4V alloy", Rapid Prototyping Journal, Vol. 30 No. 8, pp. 1638-1647. https://doi.org/10.1108/RPJ-02-2023-0052
Publisher
:Emerald Publishing Limited
Copyright © 2024, Emerald Publishing Limited