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Experimental study on surface quality and machinability of Ti-6Al-4V rotated parts fabricated by low-speed wire electrical discharge turning

Experimental study on surface quality and machinability of Ti-6Al-4V rotated parts fabricated by... This paper firstly focused on analyzing the characteristics of surface damage in low-speed wire electrical discharge machining (LS-WEDM) and introducing the multiple cutting strategy into the LS-WEDT to improve the surface quality and minimize surface defects. Surface and sub-surface damages of Ti-6Al-4V (TC4) workpiece produced in LS-WEDT are discussed, which includes craters, cracks, surface alloying, surface composition, micro-hardness, and white layer. Experimental results indicated that the craters produced in LS-WEDTed surface are extended and very shallow. Although TC4 material has poor thermal conductivity, cracks can completely disappear by decreasing peak current in LS-WEDT, which differs from LS-WEDM. Comparing with LS-WEDMed surfaces, debris adhering on LS-WEDTed surface is very few due to good flushing condition and point contact discharge mechanism. The foreign elements of oxygen and copper are detected on LS-WEDTed surface, but the contents are less than LS-WEDMed surface. The micro-hardness of the heat-affected zone is much lower than substrate and the discontinuous white layer is obtained in LS-WEDT. The LS-WEDTed surface machined after finishing trim cut (FTC) is very smooth with invisible craters, and the white and heat-affected layers’ thickness are greatly reduced. Finally, practical machining is carried out via fabrication of the rotated micro-part and taper pin with diameter of 40 μm. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png The International Journal of Advanced Manufacturing Technology Springer Journals

Experimental study on surface quality and machinability of Ti-6Al-4V rotated parts fabricated by low-speed wire electrical discharge turning

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References (24)

Publisher
Springer Journals
Copyright
Copyright © 2017 by Springer-Verlag London Ltd., part of Springer Nature
Subject
Engineering; Industrial and Production Engineering; Media Management; Mechanical Engineering; Computer-Aided Engineering (CAD, CAE) and Design
ISSN
0268-3768
eISSN
1433-3015
DOI
10.1007/s00170-017-1360-4
Publisher site
See Article on Publisher Site

Abstract

This paper firstly focused on analyzing the characteristics of surface damage in low-speed wire electrical discharge machining (LS-WEDM) and introducing the multiple cutting strategy into the LS-WEDT to improve the surface quality and minimize surface defects. Surface and sub-surface damages of Ti-6Al-4V (TC4) workpiece produced in LS-WEDT are discussed, which includes craters, cracks, surface alloying, surface composition, micro-hardness, and white layer. Experimental results indicated that the craters produced in LS-WEDTed surface are extended and very shallow. Although TC4 material has poor thermal conductivity, cracks can completely disappear by decreasing peak current in LS-WEDT, which differs from LS-WEDM. Comparing with LS-WEDMed surfaces, debris adhering on LS-WEDTed surface is very few due to good flushing condition and point contact discharge mechanism. The foreign elements of oxygen and copper are detected on LS-WEDTed surface, but the contents are less than LS-WEDMed surface. The micro-hardness of the heat-affected zone is much lower than substrate and the discontinuous white layer is obtained in LS-WEDT. The LS-WEDTed surface machined after finishing trim cut (FTC) is very smooth with invisible craters, and the white and heat-affected layers’ thickness are greatly reduced. Finally, practical machining is carried out via fabrication of the rotated micro-part and taper pin with diameter of 40 μm.

Journal

The International Journal of Advanced Manufacturing Technology – Springer Journals

Published: Nov 25, 2017

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