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Study on the influence of process parameters on high performance Ti-6Al-4V parts in laser powder bed fusion

Peng Wang (Faculty of Materials and Manufacturing, Mechanical Industry Key Laboratory of Heavy Machine Tool Digital Design and Testing, Beijing University of Technology, Beijing, China and Faculty of Materials and Manufacturing, Beijing Key Laboratory of Advanced Manufacturing Technology, Beijing University of Technology, Beijing, China)
Dongju Chen (Faculty of Materials and Manufacturing, Mechanical Industry Key Laboratory of Heavy Machine Tool Digital Design and Testing, Beijing University of Technology, Beijing, China and Faculty of Materials and Manufacturing, Beijing Key Laboratory of Advanced Manufacturing Technology, Beijing University of Technology, Beijing, China)
Jinwei Fan (Faculty of Materials and Manufacturing, Mechanical Industry Key Laboratory of Heavy Machine Tool Digital Design and Testing, Beijing University of Technology, Beijing, China and Faculty of Materials and Manufacturing, Beijing Key Laboratory of Advanced Manufacturing Technology, Beijing University of Technology, Beijing, China)
Kun Sun (Faculty of Materials and Manufacturing, Mechanical Industry Key Laboratory of Heavy Machine Tool Digital Design and Testing, Beijing University of Technology, Beijing, China and Faculty of Materials and Manufacturing, Beijing Key Laboratory of Advanced Manufacturing Technology, Beijing University of Technology, Beijing, China)
Shuiyuan Wu (Faculty of Materials and Manufacturing, Mechanical Industry Key Laboratory of Heavy Machine Tool Digital Design and Testing, Beijing University of Technology, Beijing, China and Faculty of Materials and Manufacturing, Beijing Key Laboratory of Advanced Manufacturing Technology, Beijing University of Technology, Beijing, China)
Jia Li (Faculty of Materials and Manufacturing, Mechanical Industry Key Laboratory of Heavy Machine Tool Digital Design and Testing, Beijing University of Technology, Beijing, China and Faculty of Materials and Manufacturing, Beijing Key Laboratory of Advanced Manufacturing Technology, Beijing University of Technology, Beijing, China)
Yueqiang Sun (Faculty of Materials and Manufacturing, Mechanical Industry Key Laboratory of Heavy Machine Tool Digital Design and Testing, Beijing University of Technology, Beijing, China and Faculty of Materials and Manufacturing, Beijing Key Laboratory of Advanced Manufacturing Technology, Beijing University of Technology, Beijing, China)

Rapid Prototyping Journal

ISSN: 1355-2546

Article publication date: 21 April 2022

Issue publication date: 14 October 2022

231

Abstract

Purpose

The purpose of this paper is to improve the performance and quality of Ti-6Al-4V fabricated by laser powder bed fusion.

Design/methodology/approach

Single-track experiments were conducted during the fabrication process to obtain the single tracks with excellent wettability to narrow the process parameter window. The effects of process parameters on the build surface, cross-section, relative density, defects, surface roughness, microstructure and mechanical properties of the parts were analyzed through multilayer fabrication experiments and surface optimization experiments.

Findings

The point distance has the greatest influence on the build surface of the fabricated parts, and the unmelted defects can be eliminated when the point distance is 35 µm. The relative density of the fabricated parts decreased with the increase of the point distance, and the hatch spacing has different characteristics with respect to the relative density of the fabricated parts under different laser powers. It was observed that the most of experimental groups with higher relative densities than 99%, and the highest density could reach 99.99%. The surface roughness can be reduced to less than 10 µm through remelting optimization.

Originality/value

The research results can provide theoretical support for scientific researchers and data support for engineers.

Keywords

Acknowledgements

Funding: This research was funded by the National Natural Science Foundation of China Grant Number 51875010.

Data availability: All authors have been personally and actively involved in substantive work leading to the report and will hold themselves jointly and individually responsible for its content.

Ethical approval: The material has not been published in whole or in part elsewhere; the paper is not currently being considered for publication elsewhere.

Conflict of interest: The authors declare that they have no conflict of interest.

Citation

Wang, P., Chen, D., Fan, J., Sun, K., Wu, S., Li, J. and Sun, Y. (2022), "Study on the influence of process parameters on high performance Ti-6Al-4V parts in laser powder bed fusion", Rapid Prototyping Journal, Vol. 28 No. 9, pp. 1655-1676. https://doi.org/10.1108/RPJ-09-2021-0235

Publisher

:

Emerald Publishing Limited

Copyright © 2022, Emerald Publishing Limited

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