Influence Factors and Microstructures of Machined Surface in Electrical Discharge Machining for SiCw/2024 Aluminium Matrix Composite

DOI

10.2991/icmse-18.2018.35How to use a DOI?

Keywords

SiCw/2024; aluminium matrix composites; electrical discharge machining (EDM); microstructure.

Abstract

The microstructures of machined surface of the specimens in electrical discharge machining(EDM) for SiCw/2024 aluminium matrix composites were measured with scanning electron microscope(SEM) and Talysurf-6 roughometer, and the energy spectrums of them were analyzed using EDAX spectrometer. The results show that the microstructures of machined surface are the “birds nest” shape complex structures, and mainly by the formation of pits, flange convexes, bonding of aluminium droplets again, cracks and SiCw whisker breakages. Moreover, deformation and failure modes of SiCw whiskers have three kinds of fusing and breaking off, pulling out directly, bonding again. With the increase of pulse width, processing speed and roughness values of the machined surface will increase, too. However, with the increase of pulse interval, processing speed will rapidly decrease, but roughness values of machined surface will maintain the stability.

Copyright

© 2018, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Dazhen Wang
AU  - Peifeng Feng
PY  - 2018/05
DA  - 2018/05
TI  - Influence Factors and Microstructures of Machined Surface in Electrical Discharge Machining for SiCw/2024 Aluminium Matrix Composite
BT  - Proceedings of the 2018 8th International Conference on Manufacturing Science and Engineering (ICMSE 2018)
PB  - Atlantis Press
SP  - 174
EP  - 180
SN  - 2352-5401
UR  - https://doi.org/10.2991/icmse-18.2018.35
DO  - 10.2991/icmse-18.2018.35
ID  - Wang2018/05
ER  -