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Article

Variations in the Surface Integrity of Ti-6Al-4V by Combinations of Additive and Subtractive Manufacturing Processes

1
Department of Mechanical Engineering, Lebanese American University, Byblos 36, Lebanon
2
Department of Production Engineering, Manufacturing and Metrology Systems, KTH, Royal Institute of Technology, 100 44 Stockholm, Sweden
*
Author to whom correspondence should be addressed.
Materials 2020, 13(8), 1825; https://doi.org/10.3390/ma13081825
Received: 18 February 2020 / Revised: 3 April 2020 / Accepted: 8 April 2020 / Published: 13 April 2020
(This article belongs to the Special Issue Machinability of Metallic Materials and Composites)
Additive manufacturing (AM) has recently been accorded considerable interest by manufacturers. Many manufacturing industries, amongst others in the aerospace sector, are already using AM parts or are investing in such manufacturing methods. Important material properties, such as microstructures, residual stress, and surface topography, can be affected by AM processes. In addition, a subtractive manufacturing (SM) process, such as machining, is required for finishing certain parts when accurate tolerances are required. This finish machining will subsequently affect the surface integrity and topography of the material. In this research work, we focused on the surface integrity of Ti-6Al-4V parts manufactured using three different types of AM and finished using an SM step. The aim of this study was to gain an understanding on how each process affects the resulting surface integrity of the material. It was found that each AM process affects the materials’ properties differently and that clear differences exist compared to a reference material manufactured using conventional methods. The newly generated surface was investigated after the SM step and each combination of AM/SM resulted in differences in surface integrity. It was found that different AM processes result in different microstructures which in turn affect surface integrity after the SM process. View Full-Text
Keywords: additive manufacturing; titanium; machining; surface integrity additive manufacturing; titanium; machining; surface integrity
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MDPI and ACS Style

Bejjani, R.; Bamford, E.; Cedergren, S.; Archenti, A.; Rashid, A. Variations in the Surface Integrity of Ti-6Al-4V by Combinations of Additive and Subtractive Manufacturing Processes. Materials 2020, 13, 1825. https://doi.org/10.3390/ma13081825

AMA Style

Bejjani R, Bamford E, Cedergren S, Archenti A, Rashid A. Variations in the Surface Integrity of Ti-6Al-4V by Combinations of Additive and Subtractive Manufacturing Processes. Materials. 2020; 13(8):1825. https://doi.org/10.3390/ma13081825

Chicago/Turabian Style

Bejjani, Roland, Erik Bamford, Stefan Cedergren, Andreas Archenti, and Amir Rashid. 2020. "Variations in the Surface Integrity of Ti-6Al-4V by Combinations of Additive and Subtractive Manufacturing Processes" Materials 13, no. 8: 1825. https://doi.org/10.3390/ma13081825

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